Intel(R) Xeon(TM) Processor with 512 KB L2 Cache Datasheet
Intel
®
Xeon
TM
Processor with 533 MHz
Front Side Bus at 2 GHz to 3.06 GHz
Product Features
·
Available at 2, 2.40, 2.66, 2.80, and 3.06 GHz
·
Dual processing server/workstation support
·
Binary compatible with applications running on
previous members of Intel's IA32
microprocessor line
·
Intel
®
NetBurstTM micro-architecture
·
Hyper-Threading Technology
-- Hardware support for multithreaded
applications
·
533 MHz Front Side Bus
-- Bandwidth up to 4.3 GB/second
·
Rapid Execution Engine: Arithmetic Logic
Units (ALUs) run at twice the processor core
frequency
·
Hyper Pipelined Technology
·
Advance Dynamic Execution
-- Very deep out-of-order execution
-- Enhanced branch prediction
·
Level 1 Execution Trace Cache stores 12 K
micro-ops and removes decoder latency from
main execution loops
--
Includes 8 KB Level 1 data cache
·
512 KB Advanced Transfer L2 Cache (on-die,
full speed Level 2 cache) with 8-way
associativity and Error Correcting Code (ECC)
·
Enables system support of up to 64 GB of
physical memory
·
Streaming SIMD Extensions 2 (SSE2)
-- 144 new instructions for double-precision
floating point operations, media/video
streaming, and secure transactions
·
Enhanced floating point and multimedia unit for
enhanced video, audio, encryption, and 3D
performance
·
Power Management capabilities
-- System Management mode
-- Multiple low-power states
·
Advanced System Management Features
-- Thermal Monitor
--
Machine Check Architecture (MCA)
Document Number: 252135-003
March 2003
The Intel Xeon processor with 533 MHz Front
Side Bus delivers compute power at unparalleled
value and flexibility for powerful workstations,
internet infrastructure, and departmental server
applications. The Intel
®
NetBurstTM micro-
architecture and Hyper-Threading Technology
deliver outstanding performance and headroom
for peak internet server workloads, resulting in
faster response times, support for more users, and
improved scalability.
The Intel
®
XeonTM Processor with 533 MHz Front Side Bus is designed for high-performance
dual-processor workstation and server applications. Based on the Intel
®
NetBurstTM micro-
architecture and the new Hyper-Threading Technology, it is binary compatible with previous
Intel Architecture (IA-32) processors. The Intel Xeon processor with 533 MHz Front Side Bus is
scalable to two processors in a multiprocessor system providing exceptional performance for
applications running on advanced operating systems such as Windows XP*, Windows* 2000,
Linux*, and UNIX*.
2
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL® PRODUCTS. NO LICENSE, EXPRESS OR IMPLIED, BY
ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT. EXCEPT AS PROVIDED IN
INTEL'S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, INTEL ASSUMES NO LIABILITY WHATSOEVER, AND INTEL DISCLAIMS
ANY EXPRESS OR IMPLIED WARRANTY, RELATING TO SALE AND/OR USE OF INTEL PRODUCTS INCLUDING LIABILITY OR WARRANTIES
RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER
INTELLECTUAL PROPERTY RIGHT. Intel products are not intended for use in medical, life saving, life sustaining applications.
Intel may make changes to specifications and product descriptions at any time, without notice.
*
Other names and brands may be claimed as the property of others.
Designers must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined." Intel reserves these for
future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them.
The Intel
®
XeonTM processor may contain design defects or errors known as errata which may cause the product to deviate from
published specifications. Current characterized errata are available on request.
MPEG is an international standard for video compression/
decompression promoted by ISO. Implementations of MPEG CODECs, or MPEG enabled platforms may require licenses from various entities,
including Intel Corporation.
Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature may be obtained by calling 1-800-
548-4725 or by visiting Intel's website at http://www.intel.com.
Intel, Pentium, Pentium III Xeon, Intel Xeon and Intel NetBurst are trademark or registered trademarks of Intel Corporation or its subsidiaries in the
United States and other countries.
Copyright © Intel Corporation, 2002-2003
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
3
Contents
1.0
Introduction......................................................................................................................... 7
1.1
Terminology........................................................................................................... 8
1.1.1
Processor Packaging Terminology........................................................... 8
1.2
State of Data ......................................................................................................... 9
1.3
References .......................................................................................................... 10
2.0
Electrical Specifications.................................................................................................... 11
2.1
Front Side Bus and GTLREF .............................................................................. 11
2.2
Power and Ground Pins ...................................................................................... 11
2.3
Decoupling Guidelines ........................................................................................ 11
2.3.1
VCC
Decoupling ..................................................................................... 12
2.3.2
Front Side Bus AGTL+ Decoupling ........................................................ 12
2.4
Front Side Bus Clock (BCLK[1:0]) and Processor Clocking................................ 12
2.4.1
Bus Clock ............................................................................................... 13
2.5
PLL Filter ............................................................................................................. 13
2.5.1
Mixing Processors .................................................................................. 15
2.6
Voltage Identification .......................................................................................... 15
2.6.1
Mixing Processors of Different Voltages ................................................ 16
2.7
Reserved Or Unused Pins................................................................................... 17
2.8
Front Side Bus Signal Groups............................................................................. 17
2.9
Asynchronous GTL+ Signals............................................................................... 19
2.10
Maximum Ratings................................................................................................ 19
2.11
Processor DC Specifications............................................................................... 19
2.12
AGTL+ Front Side Bus Specifications ................................................................. 26
3.0
Mechanical Specifications ................................................................................................ 29
3.1
Mechanical Specifications ................................................................................... 30
3.2
Processor Package Load Specifications ............................................................. 35
3.3
Insertion Specifications ....................................................................................... 36
3.4
Mass Specifications............................................................................................. 36
3.5
Materials.............................................................................................................. 36
3.6
Markings.............................................................................................................. 37
3.7
Pin-Out Diagram.................................................................................................. 38
4.0
Pin Listing and Signal Definitions ..................................................................................... 41
4.1
Processor Pin Assignments ................................................................................ 41
4.1.1
Pin Listing by Pin Name ......................................................................... 41
4.1.2
Pin Listing by Pin Number ...................................................................... 50
4.2
Signal Definitions................................................................................................. 60
5.0
Thermal Specifications ..................................................................................................... 69
5.1
Thermal Specifications ........................................................................................ 70
5.2
Measurements for Thermal Specifications ......................................................... 72
5.2.1
Processor Case Temperature Measurement ......................................... 72
6.0
Features ........................................................................................................................... 73
6.1
Power-On Configuration Options ........................................................................ 73
6.2
Clock Control and Low Power States.................................................................. 73
4
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
6.2.1
Normal State--State 1 ........................................................................... 73
6.2.2
AutoHALT Powerdown State--State 2 .................................................. 74
6.2.3
Stop-Grant State--State 3 ..................................................................... 74
6.2.4
HALT/Grant Snoop State--State 4 ........................................................ 75
6.2.5
Sleep State--State 5.............................................................................. 75
6.2.6
Bus Response During Low Power States .............................................. 76
6.3
Thermal Monitor .................................................................................................. 76
6.3.1
Thermal Diode........................................................................................ 77
7.0
Boxed Processor Specifications....................................................................................... 79
7.1
Introduction ......................................................................................................... 79
7.2
Mechanical Specifications................................................................................... 80
7.2.1
Boxed Processor Heatsink Dimensions ................................................. 80
7.2.2
Boxed Processor Heatsink Weight......................................................... 80
7.2.3
Boxed Processor Retention Mechanism and Heatsink Supports........... 80
7.3
Boxed Processor Requirements ......................................................................... 84
7.3.1
Intel® XeonTM Processor with 533 MHz Front Side Bus ........................ 84
7.3.2
1U Rack Mount Server Solution ............................................................. 88
7.4
Thermal Specifications........................................................................................ 90
7.4.1
Boxed Processor Cooling Requirements ............................................... 90
8.0
Debug Tools Specifications.............................................................................................. 91
8.1
Logic Analyzer Interface (LAI) ............................................................................. 91
8.1.1
Mechanical Considerations .................................................................... 91
8.1.2
Electrical Considerations........................................................................ 91
Figures
1
Typical VCCIOPLL, VCCA and VSSA Power Distribution .................................. 14
2
Phase Lock Loop (PLL) Filter Requirements ...................................................... 14
3
Intel® XeonTM processor with 533 MHz Front Side Bus Voltage-
Current Projections (VID 1.5V)............................................................................ 22
4
Intel Xeon processor with 533 MHz Front Side Bus Voltage-Current
Projections (VID 1.525V)..................................................................................... 23
5
Electrical Test Circuit .......................................................................................... 27
6
THERMTRIP# to VCC Timing ............................................................................. 27
7
FC-mPGA2 Processor Package Assembly Drawing........................................... 29
8
FC-mPGA Processor Package Top View: Component Placement Detail........... 30
9
Intel® XeonTM Processor with 533 MHz Front Side Bus in the
FC-mPGA2 Package Drawing ............................................................................ 31
10
FC-mPGA2 Processor Package Top View: Component Height Keep-in ............ 32
11
FC-mPGA2 Processor Package Cross Section View: Pin Side
Component Keep-in ............................................................................................ 33
12
FC-mPGA2 Processor Package: Pin Detail ........................................................ 34
13
IHS Flatness and Tilt Drawing............................................................................. 35
14
Processor Top-Side Markings ............................................................................. 37
15
Processor Bottom-Side Markings........................................................................ 37
16
Processor Pin Out Diagram: Top View ............................................................... 38
17
Processor Pin Out Diagram: Bottom View .......................................................... 39
18
Processor with Thermal and Mechanical Components - Exploded View ............ 69
19
Processor Thermal Design Power vs Electrical Projections for VID = 1.500V... 70
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
5
20
Processor Thermal Design Power vs Electrical Projections for VID = 1.525V .... 71
21
Thermal Measurement Point for Processor TCASE............................................ 72
22
Stop Clock State Machine ................................................................................... 74
23
Mechanical Representation of the Boxed Processor Passive Heatsink.............. 79
24
Boxed Processor Retention Mechanism and Clip ............................................... 81
25
Boxed Processor Retention Mechanism that Ships with the Processor.............. 82
26
Multiple View Space Requirements for the Boxed Processor ............................. 83
27
Fan Connector Electrical Pin Sequence............................................................. 85
28
Processor Wind Tunnel General Dimensions ..................................................... 86
29
Processor Wind Tunnel Detailed Dimensions ..................................................... 87
30
Exploded View of the 1U Thermal Solution......................................................... 88
31
Assembled View of the 1U Thermal Solution ...................................................... 89
Tables
1
Front Side Bus-to-Core Frequency Ratio ............................................................ 13
2
Front Side Bus Clock Frequency Select Truth Table for BSEL[1:0].................... 13
3
Voltage Identification Definition ........................................................................... 16
4
Front Side Bus Signal Groups............................................................................. 18
5
Processor Absolute Maximum Ratings ............................................................... 19
6
Voltage and Current Specifications ..................................................................... 21
7
Front Side Bus Differential BCLK Specifications................................................. 23
8
AGTL+ Signal Group DC Specifications ............................................................. 24
9
TAP and PWRGOOD Signal Group DC Specifications....................................... 24
10
Asynchronous GTL+ Signal Group DC Specifications ........................................ 25
11
BSEL[1:0] and VID[4:0] DC Specifications.......................................................... 25
12
AGTL+ Bus Voltage Definitions........................................................................... 26
13
Miscellaneous Signals + Specifications .............................................................. 27
14
Dimensions for the Intel® XeonTM Processor with 533 MHz Front
Side Bus in the FC-mPGA2 Package.................................................................. 32
15
Package Dynamic and Static Load Specifications .............................................. 35
16
Processor Mass................................................................................................... 36
17
Processor Material Properties ............................................................................. 36
38
Pin Listing by Pin Name ...................................................................................... 41
39
Pin Listing by Pin Number ................................................................................... 50
41
Signal Definitions................................................................................................. 60
42
Processor Thermal Design Power....................................................................... 70
43
Power-On Configuration Option Pins .................................................................. 73
44
Thermal Diode Parameters ................................................................................. 77
45
Thermal Diode Interface...................................................................................... 78
46
Fan Cable Connector Requirements................................................................... 85
47
Fan Power and Signal Specifications.................................................................. 85
6
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
Revision History
Date of Release
Revision
No.
Description
November 2002
-001
Initial Release
February 2003
-002
Added 3.06 GHz information.
Edited definitions with current terminology.
Added two TDP loadline figures in chapter 6.
Edited figures 18 and 19.
Added notes to signal definition tables for symmetric agents.
Edited Chapter 8.0 Boxed Processor Specifications.
March 2003
-003
Deleted Chapter 3 and Removed Section 2.13, 2.14
Added Table 13
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
7
1.0
Introduction
The Intel
®
XeonTM Processor with 533 MHz Front Side Bus is based on the Intel
®
NetBurstTM
micro-architecture, which operates at significantly higher clock speeds and delivers performance
levels that are significantly higher than previous generations of IA-32 processors. While based on
the Intel
NetBurst micro-architecture, it maintains the tradition of compatibility with IA-32
software.
The Intel
NetBurst micro-architecture features begin with innovative techniques that enhance
processor execution such as Hyper Pipelined Technology, a Rapid Execution Engine, Advanced
Dynamic Execution, enhanced Floating Point and Multimedia unit, and Streaming SIMD
Extensions 2 (SSE2). The Hyper Pipelined Technology doubles the pipeline depth in the processor,
allowing the processor to reach much higher core frequencies. The Rapid Execution Engine allows
the two integer ALUs in the processor to run at twice the core frequency, which allows many
integer instructions to execute in one half of the internal core clock period. The Advanced Dynamic
Execution improves speculative execution and branch prediction internal to the processor. The
floating point and multi-media units have been improved by making the registers 128 bits wide and
adding a separate register for data movement. Finally, SSE2 adds 144 new instructions for double-
precision floating point, SIMD integer, and memory management for improvements in video/
multimedia processing, secure transactions, and visual internet applications.
Also part of the Intel NetBurst micro-architecture, the front side bus and caches on the Intel Xeon
processor with 533 MHz Front Side Bus provide tremendous throughput for server and workstation
workloads. The 533 MHz Front Side Bus provides a high-bandwidth pipeline to the system
memory and I/O. It is a quad-pumped bus running off a 133 MHz Front Side Bus clock making
4.3 Gigabytes per second (4,300 Megabytes per second) data transfer rates possible. The Execution
Trace Cache is a level 1 cache that stores approximately twelve thousand decoded micro-
operations, which removes the decoder latency from the main execution path and increases
performance. The Advanced Transfer Cache is a 512 KB on-die level 2 cache running at the speed
of the processor core providing increased bandwidth over previous micro-architectures.
In addition to the Intel NetBurst micro-architecture, the Intel Xeon processor with 533 MHz Front
Side Bus includes a groundbreaking new technology called Hyper-Threading technology, which
enables multi-threaded software to execute tasks in parallel within the processor resulting in a more
efficient, simultaneous use of processor resources. Server applications can realize increased
performance from Hyper-Threading technology today, while workstation applications are expected
to benefit from Hyper-Threading technology in the future through software and processor
evolution. The combination of Intel NetBurst micro-architecture and Hyper-Threading technology
delivers outstanding performance, throughput, and headroom for peak software workloads
resulting in faster response times and improved scalability.
The Intel
Xeon processor with 533 MHz Front Side Bus is intended for high performance worksta-
tion and server systems with up to two processors on a single bus. The processor supports both uni-
and dual-processor designs. The Intel Xeon with 533 MHz Front Side Bus processors do not incor-
porate system managment devices (PIROM, OEM Scratchpad EEPROM, and thermal sensor), but
offer direct access to the pins of an on-die thermal diode. These output pins can interface with a
thermal sensor device that is placed on the baseboard. The Intel
Xeon processor with 533 MHz
Front Side Bus is packaged in a 604-pin flip chip micro-PGA2 (FC-mPGA2) package, and utilizes
a surface mount ZIF socket with 604 pins.
The FC-mPGA2 package contains an extra pin (located at location AE30) compared to the INT-
mPGA package. This additional pin serves as a keying mechanism to prevent the FC-mPGA2
package from being installed in the 603-pin socket since processors in the FC-mPGA2 package are
8
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
only supported in the 604-pin socket. Since the additional contact for pin AE30 is electrically inert,
the 604-pin socket will not have a solder ball at this location.
Mechanical components used for attaching thermal solutions to the baseboard should have a high
degree of commonality with the thermal solution components enabled for the Intel Xeon processor
Heatsinks and retention mechanisms have been designed with manufacturability as a high priority.
Hence, mechanical assembly can be completed from the top of the baseboard.
The Intel
Xeon processor with 533 MHz Front Side Bus uses a scalable front side bus protocol
referred to as the "Front Side Bus" in this document. The processor front side bus utilizes a split-
transaction, deferred reply protocol similar to that introduced by the Pentium
®
Pro processor Front
Side Bus, but is not compatible with the Pentium Pro processor front side bus. The Intel
Xeon
processor with 533 MHz Front Side Bus is compatible with the Intel Xeon processor Front Side
Bus. The front side bus uses Source-Synchronous Transfer (SST) of address and data to improve
performance, and transfers data four times per bus clock (4X data transfer rate). Along with the 4X
data bus, the address bus can deliver addresses two times per bus clock and is referred to as a
`double-clocked' or 2X address bus. In addition, the Request Phase completes in one clock cycle.
Working together, the 4X data bus and 2X address bus provide a data bus bandwidth of up to 4.3
Gigabytes per second. Finally, the front side bus also introduces transactions that are used to
deliver interrupts.
Signals on the front side bus use Assisted GTL+ (AGTL+) level voltages which are fully described
in the appropriate platform design guide (refer to
Section 1.3
).
1.1
Terminology
A `#' symbol after a signal name refers to an active low signal, indicating a signal is in the asserted
state when driven to a low level. For example, when RESET# is low, a reset has been requested.
Conversely, when NMI is high, a nonmaskable interrupt has occurred. In the case of signals where
the name does not imply an active state but describes part of a binary sequence (such as address or
data), the `#' symbol implies that the signal is inverted. For example, D[3:0] = `HLHL' refers to a
hex `A', and D[3:0]# = `LHLH' also refers to a hex `A' (H= High logic level, L= Low logic level).
Front Side Bus (FSB): The electrical interface that connects the processor to the chipset. Also
referred to as the processor system bus or the system bus. All memory and I/O transactions as well
as interrupt messages pass between the processor and chipset over the FSB.
1.1.1
Processor Packaging Terminology
Commonly used terms are explained here for clarification:
·
604-pin socket
-
The 604-pin socket contains an additional contact to accept the additional
keying pin on the Intel Xeon processor in the FC-mPGA2 packages at pin location AE30. The
604-pin socket will also accept processors with the INT-mPGA package. Since the additional
contact for pin AE30 is electrically inert, the 604-pin socket will not have a solder ball at this
location. Therefore, the additional keying pin will not require a baseboard via nor a surface-
mount pad. See the mPGA604 Socket Design Guidelines for details regarding this socket.
·
Central Agent - The central agent is the host bridge to the processor and is typically known as
the chipset.
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
9
·
Flip Chip Ball Grid Array (FC-BGA) - Microprocessor packaging using "flip chip" design,
where the processor is attached to the substrate face-down for better signal integrity, more
efficient heat removal and lower inductance.
·
FC-mPGA2 - Packaging technology with the processor die mounted directly to a micro-Pin
Grid Array substrate with an integrated heat spreader (IHS).
·
Front Side Bus - Front Side Bus (FSB) is the electrical interface that connects the processor to
the chipset. Also referred to as the processor system bus or the system bus. All memory and
I/O transactions as well as interrupt messages pass between the processor and chipset over the
FSB.
·
Intel
®
XeonTM processor with 512 KB L2 cache - The entire processor in its INT-mPGA
package, including processor core in its FC-BGA package, integrated heat spreader (IHS), and
interposer.
·
Intel
®
XeonTM processor with 533 MHz Front Side Bus - The entire processor in its FC-
mPGA2 package, including processor core in its FC-BGA package, integrated heat spreader
(IHS), and interposer.
·
Integrated Heat Spreader (IHS) - The surface used to attach a heatsink or other thermal
solution to the processor.
·
Interposer - The structure on which the processor core package and I/O pins are mounted.
·
OEM - Original Equipment Manufacturer.
·
Processor core - The processor's execution engine. All AC timing and signal integrity
specifications are to the pads of the processor core.
·
Retention mechanism - The support components that are mounted through the baseboard to
the chassis to provide mechanical retention for the processor and heatsink assembly.
·
Symmetric Agent - A symmetric agent is a processor which shares the same I/O subsystem
and memory array, and runs the same operating system as another processor in a system.
Systems using symmetric agents are known as Symmetric Multiprocessing (SMP) systems.
Intel
®
XeonTM (DP - Dual Processor) processors should only be used in SMP systems which
have two or fewer symmetric agents.
1.2
State of Data
The data contained in this document is subject to change. It is the best information that Intel is able
to provide at the publication date of this document.
10
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
1.3
References
The reader of this specification should also be familiar with material and concepts presented in the
following documents:
.
NOTES:
1. Contact your Intel representative for the latest revision of documents without order numbers.
Document
Intel Order Number
1
AP-485, Intel® Processor Identification and the CPUID Instruction
241618
IA-32 Intel ® Architecture Software Developer's Manual
· Volume I: Basic Architecture
· Volume II: Instruction Set Reference
· Volume III: System Programming Guide
245470
245471
245472
Intel ® Xeon
TM
Processor with 512-KB L2 Cache and Intel
®
E7505 Chipset
Platform Design Guide
http://developer.intel.com
Intel® XeonTM Processor Thermal Design Guidelines
298348
603 -Pin Socket Design Guidelines
249672
mPGA604 Socket Design Guidelines
11299
Intel® XeonTM Processor Specification Update
249678
CK00 Clock Synthesizer/Driver Design Guidelines
249206
VRM 9.0 DC-DC Converter Design Guidelines
249205
VRM 9.1 DC-DC Converter Design Guidelines
298646
Dual Intel® Xeon
TM
Processor Voltage Regulator Down (VRD) Design
Guidelines
298644
ITP700 Debug Port Design Guide
249679
Intel® XeonTM Processor with 533 MHz Front Side Bus System Compatibility
Guidelines
Intel® XeonTM Processor with 533 MHz Front Side Bus Signal Integrity
Models
http://developer.intel.com
Intel® XeonTM Processor with 533 MHz Front Side Bus Mechanical Models in
ProE* Format
http://developer.intel.com
IIntel® XeonTM Processor with 533 MHz Front Side Bus Mechanical Models
in IGES* Format
http://developer.intel.com
Intel® XeonTM Processor with 512-KB L2 Cache Front Side Bus Thermal
Models (FloTherm* and ICEPAK* format)
http://developer.intel.com
Intel® XeonTM Processor with 533 MHz Front Side Bus Core Boundary Scan
Descriptor Language (BSDL) Model
http://developer.intel.com
Wired for Management 2.0 Design Guide
http://developer.intel.com
Boxed Integration Notes
http://support.intel.com/
support/processors/xeon
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
11
2.0
Electrical Specifications
2.1
Front Side Bus and GTLREF
Most Intel
®
XeonTM Processor with 533MHz Front Side Bus signals use Assisted Gunning
Transceiver Logic (AGTL+) signaling technology. This signaling technology provides improved
noise margins and reduced ringing through low voltage swings and controlled edge rates.
The
processor termination voltage level is V
CC
, the operating voltage of the processor core. The use of a
termination voltage that is determined by the processor core allows better voltage scaling on the
processor front side bus. Because of the speed improvements to data and address busses, signal
integrity and platform design methods become more critical than with previous processor families.
Front side bus design guidelines are detailed in the appropriate platform design guide (refer to
Section 1.3
).
The AGTL+ inputs require a reference voltage (GTLREF) which is used by the receivers to
determine if a signal is a logical 0 or a logical 1. GTLREF must be generated on the baseboard (See
Table 12
for GTLREF specifications). Termination resistors are provided on the processor silicon
and are terminated to its core voltage (V
CC
). The on-die termination resistors are a selectable
feature and can be enabled or disabled via the ODTEN pin. For end bus agents, on-die termination
can be enabled to control reflections on the transmission line. For middle bus agents, on-die
termination must be disabled. Intel chipsets will also provide on-die termination, thus eliminating
the need to terminate the bus on the baseboard for most AGTL+ signals. Refer to
Section 2.12
for
details on ODTEN resistor termination requirements.
Note:
Some AGTL+ signals do not include on-die termination and must be terminated on the baseboard.
See
Table 4
for details regarding these signals.
The AGTL+ signals depend on incident wave switching. Therefore timing calculations for AGTL+
signals are based on flight time as opposed to capacitive deratings. Analog signal simulation of the
front side bus, including trace lengths, is highly recommended when designing a system. Please
refer to http://developer.intel.com to obtain the Intel
®
XeonTM Processor with 533 MHZ Front Side
Bus Signal Integrity Models.
2.2
Power and Ground Pins
For clean on-chip power distribution, the Intel
Xeon processor with 533 MHz Front Side Bus has
190 V
CC
(power) and 189 V
SS
(ground) inputs. All V
CC
pins must be connected to the system power
plane, while all V
SS
pins must be connected to the system ground plane. The processor V
CC
pins
must be supplied the voltage determined by the processor VID (Voltage ID) pins.
2.3
Decoupling Guidelines
Due to its large number of transistors and high internal clock speeds, the processor is capable of
generating large average current swings between low and full power states. This may cause
voltages on power planes to sag below their minimum values if bulk decoupling is not adequate.
Larger bulk storage (C
BULK
), such as electrolytic capacitors, supply current during longer lasting
changes in current demand by the component, such as coming out of an idle condition. Similarly,
they act as a storage well for current when entering an idle condition from a running condition.
12
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
Care must be taken in the baseboard design to ensure that the voltage provided to the processor
remains within the specifications listed in
Table 6
. Failure to do so can result in timing violations or
reduced lifetime of the component. For further information and guidelines, refer to the appropriate
platform design guidelines.
2.3.1
V
CC
Decoupling
Regulator solutions need to provide bulk capacitance with a low Effective Series Resistance (ESR)
and the baseboard designer must ensure a low interconnect resistance from the regulator (or VRM
pins) to the 604-pin socket. Bulk decoupling may be provided on the voltage regulation module
(VRM) to meet help meet the large current swing requirements. The remaining decoupling is
provided on the baseboard. The power delivery path must be capable of delivering enough current
while maintaining the required tolerances (defined in
Table 6
). For further information regarding
power delivery, decoupling, and layout guidelines, refer to the appropriate platform design
guidelines.
2.3.2
Front Side Bus AGTL+ Decoupling
The Intel
®
XeonTM processor with 533MHz Front Side Bus integrates signal termination on the die
as well as part of the required high frequency decoupling capacitance on the processor package.
However, additional high frequency capacitance must be added to the baseboard to properly
decouple the return currents from the front side bus. Bulk decoupling must also be provided by the
baseboard for proper AGTL+ bus operation. Decoupling guidelines are described in the appropriate
platform design guidelines.
2.4
Front Side Bus Clock (BCLK[1:0]) and Processor Clocking
BCLK[1:0] directly controls the front side bus interface speed as well as the core frequency of the
processor. As in previous generation processors, the processor core frequency is a multiple of the
BCLK[1:0] frequency. The maximum processor bus ratio multiplier will be set during
manufacturing. The default setting will equal the maximum speed for the processor.
The BCLK[1:0] inputs directly control the operating speed of the front side bus interface. The
processor core frequency is configured during reset by using values stored internally during
manufacturing. The stored value sets the highest bus fraction at which the particular processor can
operate.
Clock multiplying within the processor is provided by the internal PLL, which requires a constant
frequency BCLK[1:0] input with exceptions for spread spectrum clocking. Processor DC and AC
specifications for the BCLK[1:0] inputs are provided in
Table 7
and
Table 13
, respectively. These
specifications must be met while also meeting signal integrity requirements as outlined in
Chapter
3.0
. The processor utilizes a differential clock. Details regarding BCLK[1:0] driver specifications
are provided in the CK408 Clock Synthesizer/Driver Design Guidelines.
.
Table 1
contains the sup-
ported bus fraction ratios and their corresponding core frequencies.
Intel® XeonTM Processor with 533 MHz Front Side Bus
Datasheet
13
Table 1.
Front Side Bus-to-Core Frequency Ratio
2.4.1
Bus Clock
The front side bus frequency is set to the maximum supported by the individual processor.
BSEL[1:0] are outputs used to select the front side bus frequency.
Table 2
defines the possible
combinations of the signals and the frequency associated with each combination. The frequency is
determined by the processor(s), chipset, and clock synthesizer. All front side bus agents must
operate at the same frequency. Individual processors will only operate at their specified front side
bus clock frequency, (100 MHz for present generation processors).
The Intel® Xeon
TM
processor with a 533 MHz Front Side Bus is designed to run on a baseboard
with a 133 MHz bus clock.. On these baseboards, BSEL[0:1] are considered `reserved' at the
processor socket. .
Table 2.
Front Side Bus Clock Frequency Select Truth Table for BSEL[1:0]
2.5
PLL Filter
V
CCA
and V
CCIOPLL
are power sources required by the processor PLL clock generator. This
requirement is identical to that of the Intel Xeon
processor with 512-KB L2 cache. Since these
PLLs are analog in nature, they require quiet power supplies for minimum jitter. Jitter is
detrimental to the system: it degrades external I/O timings as well as internal core timings (i.e.
maximum frequency). To prevent this degradation, these supplies must be low pass filtered from
V
CC
. A typical filter topology is shown in
Figure 1
.
The AC low-pass requirements, with input at V
CC
and output measured across the capacitor (C
A
or
C
IO
in
Figure 1
), is as follows:
·
< 0.2 dB gain in pass band
·
< 0.5 dB attenuation in pass band < 1 Hz (see DC drop in next set of requirements)
·
> 34 dB attenuation from 1 MHz to 66 MHz
·
> 28 dB attenuation from 66 MHz to core frequency
Front Side Bus-to-Core
Frequency Ratio
Core Frequency
1/15
2 GHz
1/18
2.40 GHz
1/20
2.66 GHz
1/21
2.80 GHz
1/23
3.06 GHz
BSEL1
BSEL0
Bus Clock Frequency
L
L
100 MHz
L
H
133 MHz
H
L
Reserved
H
H
Reserved
14
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
The filter requirements are illustrated in
Figure 2
. For recommendations on implementing the filter
refer to the appropriate platform design guidelines.
Figure 1. Typical V
CCIOPLL
, V
CCA
and V
SSA
Power Distribution
VCC
VCCA
VSSA
VCCIOPLL
L1/L2
L1/L2
C
C
Processor
PLL
R-Socket
R-Trace
R-Socket
R-Socket
R-Trace
Processor interposer "pin"
Baseboard via that connects
filter to VCC plane
Trace
< 0.02
Socket pin
Figure 2. Phase Lock Loop (PLL) Filter Requirements
0 dB
-28 dB
-34 dB
0.2 dB
forbidden
zone
-0.5 dB
forbidden
zone
1 MHz
66 MHz
fcore
fpeak
1 Hz
DC
passband
high frequency
band
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
15
NOTES:
1. Diagram not to scale.
2. No specifications for frequencies beyond f
core
(core frequency).
3. f
peak
, if existent, should be less than 0.05 MHz.
2.5.1
Mixing Processors
Intel only supports those processor combinations operating with the same front side bus frequency,
core frequency, VID settings, and cache sizes. Not all operating systems can support multiple
processors with mixed frequencies. Intel does not support or validate operation of processors with
different cache sizes. Mixing processors of different steppings but the same model (as per CPUID
instruction) is supported, and is outlined in the Intel® XeonTM Processor Specification Update.
Additional details are provided in AP-485, the Intel Processor Identification and the CPUID
Instruction application note.
The Intel Xeon processor with 533 MHz Front Side Bus does not sample the pins IGNNE#,
LINT[0]/INTR, LINT[1]/NMI, and A20M# to establish the core to front side bus ratio. Rather, the
processor runs at its tested frequency at initial power-on. If the processor needs to run at a lower
core frequency, as must be done when a higher speed processor is added to a system that contains a
lower frequency processor, the system BIOS is able to effect the change in the core to front side bus
ratio.
2.6
Voltage Identification
The VID specification for the processor is defined in this datasheet, and is supported by power
delivery solutions designed according to the Dual Intel® Xeon
TM
Processor Voltage Regulator
Down (VRD) Design Guidelines, VRM 9.0 DC-DC Converter Design Guidelines, and VRM 9.1
DC-DC Converter Design Guidelines. The minimum voltage is provided in
Table 6,
and varies
with processor frequency. This allows processors running at a higher frequency to have a relaxed
minimum voltage specification. The specifications have been set such that one voltage regulator
design can work with all supported processor frequencies.
Note that the VID pins will drive valid and correct logic levels when the Intel
®
XeonTM processor
with 533 MHz Front Side Bus is provided with a valid voltage applied to the SM_V
CC
pins.
VID_V
CC
must be correct and stable prior to enabling the output of the VRM that supplies
V
CC
. Similarly, the output of the VRM must be disabled before VID_V
CC
becomes invalid.
Refer to
Figure 17
for details.
The processor uses five voltage identification pins, VID[4:0], to support automatic selection of
processor voltages.
Table 3
specifies the voltage level corresponding to the state of VID[4:0]. A `1'
in this table refers to a high voltage and a `0' refers to low voltage level. If the processor socket is
empty (VID[4:0] = 11111), or the VRD or VRM cannot supply the voltage that is requested, it must
disable its voltage output. For further details, see the Dual Intel® Xeon
TM
Processor Voltage
Regulator Down (VRD) Design Guidelines, or VRM 9.0 DC-DC Converter Design Guidelines or
the VRM 9.1 DC-DC Converter Design Guidelines.
16
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
2.6.1
Mixing Processors of Different Voltages
Mixing processors operating with different VID settings (voltages) is not supported and will not be
validated by Intel.
Table 3. Voltage Identification Definition
Processor Pins
VID4
VID3
VID2
VID1
VID0
V
CC_VID
(V)
1
1
1
1
1
VRM output off
1
1
1
1
0
1.100
1
1
1
0
1
1.125
1
1
1
0
0
1.150
1
1
0
1
1
1.175
1
1
0
1
0
1.200
1
1
0
0
1
1.225
1
1
0
0
0
1.250
1
0
1
1
1
1.275
1
0
1
1
0
1.300
1
0
1
0
1
1.325
1
0
1
0
0
1.350
1
0
0
1
1
1.375
1
0
0
1
0
1.400
1
0
0
0
1
1.425
1
0
0
0
0
1.450
0
1
1
1
1
1.475
0
1
1
1
0
1.500
0
1
1
0
1
1.525
0
1
1
0
0
1.550
0
1
0
1
1
1.575
0
1
0
1
0
1.600
0
1
0
0
1
1.625
0
1
0
0
0
1.650
0
0
1
1
1
1.675
0
0
1
1
0
1.700
0
0
1
0
1
1.725
0
0
1
0
0
1.750
0
0
0
1
1
1.775
0
0
0
1
0
1.800
0
0
0
0
1
1.825
0
0
0
0
0
1.850
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
17
2.7
Reserved Or Unused Pins
All Reserved pins must remain unconnected on the system baseboard. Connection of these pins to
V
CC
, V
SS
, or to any other signal (including one another) can result in component malfunction or
incompatibility with future processors. See
Chapter 5.0
for a pin listing of the processor and for the
location of all Reserved pins.
For reliable operation, unused inputs or bidirectional signals should always be connected to an
appropriate signal level. In a system-level design, on-die termination has been included on the
processor to allow signal termination to be accomplished by the processor silicon. Most unused
AGTL+ inputs should be left as no connects, as AGTL+ termination is provided on the processor
silicon. However, see
Table 4
for details on AGTL+ signals that do not include on-die termination.
Unused active high inputs should be connected through a resistor to ground (V
SS
). Unused outputs
can be left unconnected, however this may interfere with some TAP functions, complicate debug
probing, and prevent boundary scan testing. A resistor must be used when tying bidirectional
signals to power or ground. When tying any signal to power or ground, a resistor will also allow for
system testability. For unused AGTL+ input or I/O signals, use pull-up resistors of the same value
for the on-die termination resistors (R
TT
). See
Table 12
.
TAP, Asynchronous GTL+ inputs, and Asynchronous GTL+ outputs do not include on-die
termination. Inputs and all used outputs must be terminated on the baseboard. Unused outputs may
be terminated on the baseboard or left unconnected. Note that leaving unused outputs unterminated
may interfere with some TAP functions, complicate debug probing, and prevent boundary scan
testing. Signal termination for these signal types is discussed in the ITP700 Debug Port Design
Guide.
All TESTHI[6:0] pins should be individually connected to V
CC
via a pull-up resistor which
matches the trace impedance within
±
10
. TESTHI[3:0] and TESTHI[6:5] may all be tied
together and pulled up to V
CC
with a single resistor if desired. However, utilization of boundary
scan test will not be functional if these pins are connected together. TESTHI4 must always be
pulled up independently from the other TESTHI pins. For optimum noise margin, all pull-up
resistor values used for TESTHI[6:0] pins should have a resistance value within 20 percent of the
impedance of the baseboard transmission line traces. For example, if the trace impedance is 50
,
then a pull-up resistor value between 40 and 60
should be used. The TESTHI[6:0] termination
recommendations provided in the Intel® Xeon
TM
Processor Datasheet are also suitable for the
Intel
®
XeonTM processor with 533 MHz Front Side Bus. However, Intel recommends new designs
or designs undergoing design updates follow the trace impedance matching termination guidelines
outlined in this section.
2.8
Front Side Bus Signal Groups
In order to simplify the following discussion, the front side bus signals have been combined into
groups by buffer type. AGTL+ input signals have differential input buffers, which use GTLREF as
a reference level. In this document, the term "AGTL+ Input" refers to the AGTL+ input group as
well as the AGTL+ I/O group when receiving. Similarly, "AGTL+ Output" refers to the AGTL+
output group as well as the AGTL+ I/O group when driving.
With the implementation of a source synchronous data bus comes the need to specify two sets of
timing parameters. One set is for common clock signals whose timings are specified with respect to
rising edge of BCLK0 (ADS#, HIT#, HITM#, etc.) and the second set is for the source
synchronous signals which are relative to their respective strobe lines (data and address) as well as
18
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
rising edge of BCLK0. Asynchronous signals are still present (A20M#, IGNNE#, etc.) and can
become active at any time during the clock cycle.
Table 4
identifies which signals are common
clock, source synchronous and asynchronous.
NOTES:
1. Refer to
Section 5.2
for signal descriptions.
2. These signal groups are not terminated by the processor. Refer the ITP700 Debug Port Design Guide and
corresponding Design Guide for termination requirements and further details.
3. The Intel
®
XeonTM processor with 533MHz Front Side Bus
utilizes only BR0# and BR1#. BR2# and BR3# are
not driven by the processor but must be terminated to V
CC
. For additional details regarding the BR[3:0]#
signals, see
Section 5.2
and
Section 7.1
and the appropriate Platform Design Guidelines.
4. These signals do not have on-die termination. Refer to corresponding Platform Design Guidelines for
termination requirements.
5. Note that Reset initialization function of these pins is now a software function on the Intel
®
XeonTM
processor with 533MHz Front Side Bus.
6. The value of these pins during the active-to-inactive edge of RESET# to determine processor configuration
options. See
Section 7.1
for details.
7. These signals may be driven simultaneously by multiple agents (wired-or).
8. VID_Vcc is required for correct VID logic operation of the Intel
®
XeonTM processor with 533 MHz Front Side
Bus. Refer to
Figure 17
for details.
Table 4. Front Side Bus Signal Groups
Signal Group
Type
Signals
1
AGTL+ Common Clock Input
Synchronous to BCLK[1:0]
BPRI#, BR[3:1]#
3,4
, DEFER#, RESET#
4
,
RS[2:0]#, RSP#, TRDY#
AGTL+ Common Clock I/O
Synchronous to BCLK[1:0]
ADS#, AP[1:0]#, BINIT#
7
, BNR#
7
,
BPM[5:0]#
2
, BR0#
2
, DBSY#, DP[3:0]#,
DRDY#, HIT#
7
, HITM#
7
, LOCK#, MCERR#
7
AGTL+ Source Synchronous
I/O
Synchronous to assoc.
strobe
AGTL+ Strobes
Synchronous to BCLK[1:0]
ADSTB[1:0]#, DSTBP[3:0]#, DSTBN[3:0]#
Asynchronous GTL+ Input
4
Asynchronous
A20M#
5
, IGNNE#
5
, INIT#
6
, LINT0/INTR
5
,
LINT1/NMI
5
, SLP#, STPCLK#
Asynchronous GTL+ Output
4
Asynchronous
FERR#, IERR#, THERMTRIP#, PROCHOT#
Front Side Bus Clock
Clock
BCLK1, BCLK0
TAP Input
2
Synchronous to TCK
TCK, TDI, TMS, TRST#
TAP Output
2
Synchronous to TCK
TDO
Power/Other
Power/Other
BSEL[1:0], COMP[1:0], GTLREF, ODTEN,
Reserved, SKTOCC#, TESTHI[6:0],VID[4:0],
V
CC
, VID_V
CC
8
, V
CCA
, V
CCIOPLL
, V
SSA
, V
SS
,
V
CCSENSE
, V
SSSENSE,
PWRGOOD
Signals
Associated Strobe
REQ[4:0]#,A[16:3]#
6
ADSTB0#
A[35:17]#
5
ADSTB1#
D[15:0]#, DBI0#
DSTBP0#, DSTBN0#
D[31:16]#, DBI1#
DSTBP1#, DSTBN1#
D[47:32]#, DBI2#
DSTBP2#, DSTBN2#
D[63:48]#, DBI3#
DSTBP3#, DSTBN3#
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
19
2.9
Asynchronous GTL+ Signals
The Intel
®
XeonTM Processor with 533 MHz Front Side Bus does not utilize CMOS voltage levels
on any signals that connect to the processor silicon. As a result, legacy input signals such as
A20M#, IGNNE#, INIT#, LINT0/INTR, LINT1/NMI, SLP#, and STPCLK# utilize GTL+ input
buffers. Legacy output FERR#/PBE# and other non-AGTL+ signals IERR#, THERMTRIP# and
PROCHOT# utilize GTL+ output buffers. All of these asynchronous GTL+ signals follow the same
DC requirements as AGTL+ signals, however the outputs are not driven high (during the logical 0-
to-1 transition) by the processor (the major difference between GTL+ and AGTL+). Asynchronous
GTL+ signals do not have setup or hold time specifications in relation to BCLK[1:0]. However, all
of the asynchronous GTL+ signals are required to be asserted for at least two BCLKs in order for
the processor to recognize them. See
Table 10
for the DC specifications for the asynchronous
GTL+ signal groups.
2.10
Maximum Ratings
Table 5
lists the processor's maximum environmental stress ratings. Functional operation at the
absolute maximum and minimum is neither implied nor guaranteed. The processor should not
receive a clock while subjected to these conditions. Functional operating parameters are listed in
the AC and DC tables. Extended exposure to the maximum ratings may affect device reliability.
Furthermore, although the processor contains protective circuitry to resist damage from static
electric discharge, one should always take precautions to avoid high static voltages or electric
fields.
1. This rating applies to any pin of the processor.
2. Contact Intel for storage requirements in excess of one year.
2.11
Processor DC Specifications
The processor DC specifications in this section are defined at the processor core (pads) unless
noted otherwise. See
Section 5.1
for the processor pin listings and
Section 5.2
for the signal
definitions. The voltage and current specifications for all versions of the processor are detailed in
Table 6
. For platform planning refer to
Figure 3
. Notice that the graphs include Thermal Design
Power (TDP) associated with the maximum current levels. The DC specifications for the AGTL+
signals are listed in
Table 8
.
Table 5. Processor Absolute Maximum Ratings
Symbol
Parameter
Min
Max
Unit
Notes
T
STORAGE
Processor storage temperature
-40
85
°C
2
V
CC
Any processor supply voltage with
respect to V
SS
-0.3
1.75
V
1
V
inAGTL+
AGTL+ buffer DC input voltage with
respect to V
SS
-0.1
1.75
V
V
inGTL+
Async GTL+ buffer DC input voltage
with respect to Vss
-0.1
1.75
V
I
VID
Max VID pin current
5
mA
20
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
Table 6
through
Table 11
list the processor DC specifications and are valid only while meeting
specifications for case temperature (T
CASE
as specified in
Chapter 6.0
), clock frequency, and input
voltages. Care should be taken to read all notes associated with each parameter.
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
21
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all processors.
2. These voltages are targets only. A variable voltage source should exist on systems in the event that a
different voltage is required. See
Section 2.6
and
Table 3
for more information.
3. The voltage specification requirements are measured across vias on the platform for the V
CC_SENSE
and
V
SS_SENSE
pins close to the socket with a 100 MHz bandwidth oscilloscope, 1.5 pF maximum probe
capacitance, and 1 milliohm minimum impedance. The maximum length of ground wire on the probe should
be less than 5 mm. Ensure external noise from the system is not coupled in the scope probe.
4. The processor should not be subjected to any static Vcc level that exceeds the voltage vs current load-line for
any given current loading (as shown in figure 3 for VID=1.500V and figure 4 for VID=1.525V). Moreover, Vcc
should never exceed Vcc_VID. Failure to adhere to this specification can shorten the processor lifetime.
5. Vcc_max and Vcc_min are defined at a load of Icc_max. Icc_max is defined at Vcc_max
6. The current specified is also for AutoHALT State.
7. The maximum instantaneous current the processor will draw while the thermal control circuit is active as
indicated by the assertion of PROCHOT#.
8. VID_V
CC
is required for correct operation of the processor VID logic. Refer to
Figure 17
for details.
9. This specification applies to the PLL power pins VCCA and VCCIOPLL. See
Section 2.5
for details. This
parameter is based on design characterization and is not tested
10.This specification applies to each GTLREF pin.
11. The loadlines specify voltage limits at the die measured at V
CC_SENSE
and V
SS_SENSE
pins. Voltage
regulation feedback for voltage regulator circuits must be taken from processor V
CC
and V
SS
pins.
12.Adherence to this loadline specification is required to ensure reliable processor operation.
Table 6. Voltage and Current Specifications
Symbol
Parameter
Core Freq
Min
Typ
Max
VID
Unit
Notes
1
V
CC
V
CC
for Intel Xeon
processor with 533
MHz Front Side Bus
2 GHz
2.40 GHz
2.66 GHz
2.80 GHz
3.06 GHz
1.353
1.344
1.334
1.331
1.352
Refer to
Figure 3
1.461
1.456
1.452
1.450
1.467
1.5
1.5
1.5
1.5
1.525
V
V
V
V
V
2, 3, 4, 5,11, 12
2, 3, 4, 5,11, 12
2, 3, 4, 5,11, 12
2, 3, 4, 5,11, 12
2, 3, 4, 5,11, 12
SM_V
CC
SMBus supply
voltage
All freq.
3.135
3.30
3.465
V
8
I
CC
I
CC
for Intel Xeon
processor with 533
MHz Front Side Bus
2 GHz
2.40 GHz
2.66 GHz
2.80 GHz
3.06 GHz
45.4
51.4
57.1
59.1
69.1
A
A
A
A
A
4, 5
4, 5
4, 5
4, 5
4, 5
I
CC_PLL
I
CC
for PLL power
pins
All freq
60
mA
9
I
CC_GTLREF
I
CC
for GTLREF pins
All freq
15
µA
10
I
SGnt
/I
SLP
I
CC
Stop-Grant/Sleep
All freq
25
A
6
I
TCC
I
CC
TCC active
All freq
18.6
A
7
22
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
Figure 3. Intel® XeonTM processor with 533 MHz Front Side Bus Voltage-Current
Projections (VID 1.5V)
1.44
1.45
1.46
1.47
1.48
1.49
1.50
1.51
0
10
20
30
40
50
60
70
Processor Current (A)
M
axi
m
u
m
Processor
Vol
t
age (
V
D
C
)
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
23
Figure 4. Intel Xeon processor with 533 MHz Front Side Bus Voltage-Current
Projections (VID 1.525V)
NOTES:.
Table 7. Front Side Bus Differential BCLK Specifications
Symbol
Parameter
Min
Typ
Max
Unit
Figure
Notes
1
V
L
Input Low
Voltage
-.150
0.000
N/A
V
7
V
H
Input High
Voltage
0.660
0.710
0.850
V
7
V
CROSS(abs)
Absolute
Crossing Point
0.250
N/A
0.550
V
7, 7
2,8
V
CROSS(rel)
Relative
Crossing Point
0.250 +
0.5(V
Havg
- 0.710)
N/A
0.550 +
0.5(V
Havg
- 0.710)
V
7, 7
2,3,8,9
V
CROSS
Range of
Crossing Points
N/A
N/A
0.140
V
7, 7
2,10
V
OV
Overshoot
N/A
N/A
V
H
+ 0.3
V
7
4
V
US
Undershoot
-0.300 N/A
N/A
V
7
5
V
RBM
Ringback Margin
0.200
N/A
N/A
V
6
V
TM
Threshold Margin
V
cross
- 0.100
N/A
V
cross
+ 0.100
V
6
24
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies.
2. Crossing voltage is defined as the instantaneous voltage value when the rising edge of BCLK0 equals the
falling edge of BCLK1.
3. V
Havg
is the statistical average of the V
H
measured by the oscilloscope.
4. Overshoot is defined as the absolute value of the maximum voltage.
5. Undershoot is defined as the absolute value of the minimum voltage.
6. Ringback Margin is defined as the absolute voltage difference between the maximum Rising Edge Ringback
and the maximum Falling Edge Ringback.
7. Threshold Region is defined as a region entered around the crossing point voltage in which the differential
receiver switches. It includes input threshold hysteresis.
8. The crossing point must meet the absolute and relative crossing point specifications simultaneously.
9. V
Havg
can be measured directly using "Vtop" on Agilent* scopes and "High" on Tektronix* scopes.
10.
V
CROSS
is defined as the total variation of all crossing voltages as defined in note 2.
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies and cache sizes.
2. V
IH
is defined as the minimum voltage level at a receiving agent that will be interpreted as a logical high
value.
3. V
IL
is defined as the maximum voltage level at a receiving agent that will be interpreted as a logical low value.
4. V
IH
and V
ON
may experience excursions above V
CC
. However, input signal drivers must comply with the
signal quality specifications in
Chapter 3.0
.
5. Refer to the Intel
®
XeonTM Processor with 533 MHz Front Side Bus Signal Integrity Models for I/V
characteristics.
6. The V
CC
referred to in these specifications refers to instantaneous V
CC
.
7. V
OL_MAX
of 0.450 V is guaranteed when driving into a test load as indicated in
Figure 5
, with R
TT
enabled.
8. Leakage to V
CC
with pin held at 300 mV.
9. Leakage to V
SS
with pin held at V
CC
.
Table 9. TAP and PWRGOOD Signal Group DC Specifications
Table 8. AGTL+ Signal Group DC Specifications
Symbol
Parameter
Min
Max
Unit
Notes
1,7
V
IH
Input High Voltage
1.10 * GTLREF
V
CC
V
2, 4, 6
V
IL
Input Low Voltage
0.0
0.90 * GTLREF
V
3, 6
V
OH
Output High Voltage
N/A
V
CC
V
4, 6
I
OL
Output Low Current
N/A
V
CC
/
(0.50 * R
TT_min
+ R
ON_min
)
= 50
mA
6
I
HI
Pin Leakage High
N/A
100
µA
9
I
LO
Pin Leakage Low
N/A
500
µA
8
R
ON
Buffer On Resistance
7
11
5, 7
Symbol
Parameter
Min
Max
Unit
Notes
1, 2
V
HYS
TAP Input Hysteresis
200
300
8
V
T+
TAP input low to high
threshold voltage
0.5 * (V
CC
+ V
HYS_MIN
)
0.5 * (V
CC
+ V
HYS_MAX
)
5
V
T-
TAP input high to low
threshold voltage
0.5 * (V
CC
- V
HYS_MAX
)
0.5 * (V
CC
- V
HYS_MIN
)
5
V
OH
Output High Voltage
N/A
V
CC
V
3, 5
I
OL
Output Low Current
40
mA
6, 7
I
HI
Pin Leakage High
N/A
100
µA
10
I
LO
Pin Leakage Low
N/A
500
µA
9
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
25
NOTES:.
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies and cache sizes.
2. All outputs are open drain
3. TAP signal group must meet the system signal quality specification in Chapter 3.0.
4. Refer to the Intel
®
XeonTM Processor with 533 MHz Front Side Bus Signal Integrity Models for I/V
characteristics.
5. The V
CC
referred to in these specifications refers to instantaneous V
CC
.
6. The maximum output current is based on maximum current handling capability of the buffer and is not
specified into the test load.
7. V
OL_MAX
of 0.300V is guaranteed when driving a test load.
8. V
HYS
represents the amount of hysteresis, nominally centered about 0.5*V
CC
, for all TAP inputs.
9. Leakage to V
CC
with Pin held at 300 mV.
10.Leakage to V
SS
with pin held at V
CC
.
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies and cache sizes.
2. All outputs are open drain
3. V
IH
is defined as the minimum voltage level at a receiving agent that will be interpreted as a logical high
value.
4. V
IL
is defined as the maximum voltage level at a receiving agent that will be interpreted as a logical low value.
5. V
IH
and V
OH
may experience excursions above V
CC
. However, input signal drivers must comply with the
signal quality specifications in
Chapter 3.0
.
6. Refer to the Intel
®
XeonTMProcessor with 533 MHz Front Side Bus Signal Integrity Models for I/V
characteristics.
7. The V
CC
referred to in these specifications refers to instantaneous V
CC
.
8. The maximum output current is based on maximum current handling capability of the buffer and is not
specified into the test load.
9. V
OL_MAX
of 0.450 V is guaranteed when driving into a test load as indicated in
Figure 5
, with R
TT
enabled.
10. Leakage to V
CC
with Pin held at 300 mV.
11. Leakage to V
SS
with pin held at V
CC
.
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies and cache sizes.
2. These parameters are based on design characterization and are not tested.
Table 11. BSEL[1:0] and VID[4:0] DC Specifications
R
ON
Buffer On Resistance
8.75
13.75
4
Table 10. Asynchronous GTL+ Signal Group DC Specifications
Symbol
Parameter
Min
Max
Unit
Notes
1, 7
V
IH
Input High Voltage
1.10 * GTLREF
V
CC
V
3, 5, 7
V
IL
Input Low Voltage
0.0
0.90 * GTLREF
V
4, 6
V
OH
Output High Voltage
N/A
V
CC
V
2, 5, 7
I
OL
Output Low Current
50
mA
8,9
I
HI
Pin Leakage High
N/A
100
µA
11
I
LO
Pin Leakage Low
N/A
500
µA
10
R
ON
Buffer On Resistance
7
11
6
Symbol
Parameter
Min Max
Unit
Notes
1
Ron (BSEL)
Buffer On
Resistance
9.2
14.3
2
Ron
(VID)
Buffer On
Resistance
7.8
12.8
2
I
HI
Pin Leakage Hi
N/A
100
µA
3
26
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies.
2. These parameters are not tested and are based on design simulations.
3. Leakage to Vss with pin held at 2.50V.
2.12
AGTL+ Front Side Bus Specifications
Routing topologies are dependent on the number of processors supported and the chipset used in
the design. Please refer to the appropriate platform design guidelines.
In most cases, termination
resistors are not required as these are integrated into the processor. See
Table 4
for details on which
AGTL+ signals do not include on-die termination.The termination resistors are enabled or disabled
through the ODTEN pin. To enable termination, this pin should be pulled up to V
CC
through a
resistor and to disable termination, this pin should be pulled down to V
SS
through a resistor. For
optimum noise margin, all pull-up and pull-down resistor values used for the ODTEN pin should
have a resistance value within 20 percent of the impedance of the baseboard transmission line
traces. For example, if the trace impedance is 50
, then a value between 40 and 60
should be
used
.
The processor's on-die termination must be enabled for the end agent only. Please refer to
Table 12
for termination resistor values. For more details on platform design see the appropriate
platform design guidelines.
Valid high and low levels are determined by the input buffers via comparing with a reference
voltage called GTLREF.
Table 12
lists the GTLREF specifications. The AGTL+ reference voltage (GTLREF) should be
generated on the baseboard using high precision voltage divider circuits. It is important that the
baseboard impedance is held to the specified tolerance, and that the intrinsic trace capacitance for
the AGTL+ signal group traces is known and well-controlled. For more details on platform design
see the appropriate platform design guidelines.
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies.
2. The tolerances for this specification have been stated generically to enable system designer to calculate the
minimum values across the range of V
CC
.
3. GTLREF is generated from V
CC
on the baseboard by a voltage divider of 1 percent resistors. Refer to the
appropriate platform design guidelines for implementation details.
4. R
TT
is the on-die termination resistance measured from V
CC
to 1/3 V
CC
at the AGTL+ output driver. Refer to
the Intel
®
XeonTM Processor with 533MHz Front Side Bus Signal Integrity Models for I/V characteristics.
5. COMP resistors are pull downs to V
SS
provided on the baseboard with 1% tolerance. See the appropriate
platform design guidelines for implementation details.
6. The V
CC
referred to in these specifications refers to instantaneous V
CC
.
7. The COMP resistance value varies by platform. Refer to the appropriate platform design guideline for the
recommended COMP resistance value.
Table 12. AGTL+ Bus Voltage Definitions
Symbol
Parameter
Min
Typ
Max
Units
Notes
1
GTLREF
Bus Reference Voltage
2/3 * V
CC
- 2%
2/3 * V
CC
2/3 * V
CC
+ 2%
V
2, 3, 6
GTLREF
New Design
Bus Reference Voltage
0.63*V
CC
- 2%
0.63*V
CC
0.63*V
CC
+
2%
V
2, 3, 6,
R
TT
Termination Resistance
36
41
46
4
R
TT
New
Design
Termination Resistance
45
50
55
4, 9
COMP[1:0]
COMP Resistance
42.77
43.2
43.63
5, 8
COMP[1:0]
New
Design
COMP Resistance
49.55
50
50.45
5, 8, 9
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
27
8. The values for R
TT
and COMP noted as `New Designs' apply to designs that are optimized for the Intel
®
XeonTM processor with 533MHz Front Side Bus. Refer to the appropriate platform design guideline for the
recommended COMP resistance value.
9. This specification applies to the Intel® XeonTMprocessor with 533MHz Front Side Bus when implemented in
platforms that do not include forward compatibility with future processors.
Table 13. Miscellaneous Signals + Specifications
Figure 6. THERMTRIP# to V
CC
Timing
T# Parameter
Min
Max
Unit
Figure
Notes
T39: THERMTRIP# to Vcc Removal
0.5
S
6
Figure 5. Electrical Test Circuit
Vtt
Vtt
Rload = 50 ohms
C = 1.2pF
L = 2.4nH
AC Timings
specified at pad.
Zo = 50 ohms, d=420mils, So=169ps/in
THERMTRIP# Power Down Sequence
T39 < 0.5 seconds
Note: THERMTRIP# is undefined when RESET is active
THERMTRIP#
Vcc
T39
28
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
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Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
29
3.0
Mechanical Specifications
The Intel® XeonTM Processor with 533 MHz Front Side Bus uses the Flip Chip Micro-Pin Grid
Array (FC-mPGA) package containing the processor die covered by an integrated heat spreader
(IHS) Mechanical specifications for the processor are given in this section. See
Section 1.1
for
terminology definitions.
Figure 7
provides a basic assembly drawing and includes the components
which make up the entire processor. Package dimensions are provided in
Table 14
.
The Intel® XeonTM processor with 533 MHz Front Side Bus utilizes a surface mount 604-pin zero-
insertion force (ZIF) socket for installation into the baseboard. See the 604-Pin Socket Design
Guidelines for further details on the processor socket.
For
Figure 9
through
Figure 13
, the following notes apply:
1. Unless otherwise specified, the following drawings are dimensioned in millimeters.
2. All dimensions are not tested, but are guaranteed by design characterization.
3. Figures and drawings labelled as "Reference Dimensions" are provided for informational
purposes only. Reference Dimensions are extracted from the mechanical design database and
are nominal dimensions with no tolerance information applied. Reference Dimensions are
NOT checked as part of the processor manufacturing process. Unless noted as such,
dimensions in parentheses without tolerances are Reference Dimensions.
4. Drawings are not to scale.
Note:
applies to Intel Xeon processor in the FC-mPGA2 package.
1. Integrated Heat Spreader (IHS)
2. Processor die
3. FC-mPGA2 package
4. Land side Capacitors
5. Package Pin
Figure 7.
FC-mPGA2 Processor Package Assembly Drawing
1
2
3
30
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
3.1
Mechanical Specifications
Figure 8.
FC-mPGA Processor Package Top View: Component Placement Detail
Pin A1
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
31
Figure 9.
Intel® XeonTM Processor with 533 MHz Front Side Bus in the FC-mPGA2 Package
Drawing
32
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
Figure 10
details the keep-in zone for components mounted to the top side of the processor
interposer. The components include the EEPROM, thermal sensor, resistors and capacitors.
Table 14. Dimensions for the Intel® XeonTM Processor with 533 MHz Front Side
Bus in the FC-mPGA2 Package
Symbol
Notes
Min
Nominal
Max
A
42.40
42.50
42.60
B
30.90
31.00
31.10
E
3.42
3.60
3.78
F
1.95
2.03
2.11
G
18.80
19.05
19.30
H
37.85
38.10
38.35
J
6.35
Nominal Component Keepin
K
12.70
Nominal Component Keepin
L
14.99
15.24
15.49
M
30.23
30.48
30.73
N
6.35
Nominal Component Keepin
R
1.27
Nominal
T
12.70
P
0.26
0.31
0.36
Pin Diameter
Pin Tp
0.25
Milimeters
Figure 10.
FC-mPGA2 Processor Package Top View: Component Height Keep-in
15.5
7.5
1.61
15.5
7.5
1.61
COMPONENT KEEPOUT
CROSS HATCHED AREA
2.27 mm MAX ALLOWABLE
COMPONENT HEIGHT
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
33
Figure 11
details the keep-in specification for pin-side components. The processor may contain pin
side capacitors mounted to the processor package. These capacitors will be exposed within the
opening of the interposer cavity.
Figure 11.
FC-mPGA2 Processor Package Cross Section View: Pin Side Component Keep-in
12.7 mm
Component Keepin
1.5 mm
Component
Keepin
IHS
FC-mPGA2P
34
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
Figure 12.
FC-mPGA2 Processor Package: Pin Detail
1. Kovar pin with plating of 0.2 micrometers Au over 2.0 micrometer Ni.
2. 0.254 Diametric true position, pin to pin.
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
35
Figure 13
details the flatness and tilt specifications for the IHS of the Intel Xeon processor with
533 MHz Front Side Bus, respectively. Tilt is measured with the reference datum set to the bottom
of the processor interposer.
3.2
Processor Package Load Specifications
Table 15
provides dynamic and static load specifications for the processor IHS. These mechanical
load limits should not be exceeded during heat sink assembly, mechanical stress testing, or
standard drop and shipping conditions. The heat sink attach solutions must not induce continuous
stress onto the processor with the exception of a uniform load to maintain the heat sink-to-
processor thermal interface. It is not recommended to use any portion of the processor interposer as
a mechanical reference or load bearing surface for thermal solutions.
NOTES:
1. This specification applies to a uniform compressed load.
2. This is the maximum static force that can be applied by the heatsink and clip to maintain the heatsink and
processor interface.
3. These parameters are based on design characterization and not tested.
4. Dynamic loading specifications are defined assuming a maximum duration of 11ms.
5. The heatsink weight is assumed to be one pound. Shock input to the system during shock testing is assumed
to be 50 G's. AF is the amplification factor.
Figure 13.
IHS Flatness and Tilt Drawing
0.080
Table 15. Package Dynamic and Static Load Specifications
Parameter
Max
Unit
Unit
Static
50
lbf
1, 2, 3
Dynamic
50 + 1 lb * 50G input * 1.8 (AF)
= 140
lbf
1, 2, 4, 5
36
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
3.3
Insertion Specifications
The processor can be inserted and removed 15
times from a 604-pin socket meeting the mPGA604
Socket Design Guidelines document. Note that this specification is based on design
characterization and is not tested.
3.4
Mass Specifications
Table 16
specifies the processors mass. This includes all components which make up the entire
processor product.
3.5
Materials
The processor is assembled from several components. The basic material properties are described
in
Table 17
.
Table 16. Processor Mass
Processor
Mass (grams)
Intel® XeonTM Processor with 533 MHz Front Side
Bus
25
Table 17. Processor Material Properties
Component
Material
Integrated Heat Spreader
Nickel plated copper
FC-BGA
BT Resin
Interposer
FR4
Interposer pins
Kovar with Gold over nickel
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
37
3.6
Markings
The following section details the processor top-side laser markings. It is provided to aid in the
identification of the processor.
NOTE:
1. Character size for laser markings is: height 0.050" (1.27mm), width 0.032" (0.81mm).
2. All characters will be in upper case.
Figure 15.
Processor Bottom-Side Markings
Figure 14.
Processor Top-Side Markings
Group A Line1
Group A Line2
Group B Line1
Group B Line2
Pin A1
Dynamic Laser
Mark Area with 2D Matrix
2D Matrix encodes ATPO
number and Serial number
Group A Line1
Group A Line2
Group B Line1
Group B Line2
Group A Line1
Group A Line2
Group B Line1
Group B Line2
Pin A1
Pin A1
Dynamic Laser
Mark Area with 2D Matrix
2D Matrix encodes ATPO
number and Serial number
38
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
3.7
Pin-Out Diagram
This section provides two view of the processor pin grid.
Figure 16
and
Figure 17
detail
the coordinates of the processor pins.
Figure 16.
Processor Pin Out Diagram: Top View
Vc
c
/
V
s
s
ADDRESS
DATA
V
cc/
V
s
s
CLOCKS
SMBus
COMMON
CLOCK
COMMON
CLOCK
Async /
JTAG
= Signal
= Power
= Ground
= Reserved
A
C
E
G
J
L
N
R
U
W
AA
AC
AE
B
D
F
H
K
M
P
T
V
Y
AB
AD
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
1
= GTLREF
= SM_VCC
A
C
E
G
J
L
N
R
U
W
AA
AC
AE
B
D
F
H
K
M
P
T
V
Y
AB
AD
2
4
6
8
10
12
14
16
18
20
22
24
26
28
= Mechanical
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
39
Figure 17.
Processor Pin Out Diagram: Bottom View
Vcc/Vss
Vcc
/
Vss
= Signal
= Power
= Ground
= Reserved
= GTLREF
= SM_VCC
AD
AD
ADDRESS
DATA
CLOCKS
SMBus
COMMON
CLOCK
COMMON
CLOCK
Async /
JTAG
A
C
E
G
J
L
N
R
U
W
AA
AC
AE
B
D
F
H
K
M
P
T
V
Y
AB
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
1
A
C
E
G
J
L
N
R
U
W
AA
AC
AE
B
D
F
H
K
M
P
T
V
Y
AB
2
4
6
8
10
12
14
16
18
20
22
24
26
28
= Mechanical
40
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
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Intel® XeonTM Processor with 533MHz Front Side Bus
Datasheet
41
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
A3#
A22
Source Sync
Input/Output
A4#
A20
Source Sync
Input/Output
A5#
B18
Source Sync
Input/Output
A6#
C18
Source Sync
Input/Output
A7#
A19
Source Sync
Input/Output
A8#
C17
Source Sync
Input/Output
A9#
D17
Source Sync
Input/Output
A10#
A13
Source Sync
Input/Output
A11#
B16
Source Sync
Input/Output
A12#
B14
Source Sync
Input/Output
A13#
B13
Source Sync
Input/Output
A14#
A12
Source Sync
Input/Output
A15#
C15
Source Sync
Input/Output
A16#
C14
Source Sync
Input/Output
A17#
D16
Source Sync
Input/Output
A18#
D15
Source Sync
Input/Output
A19#
F15
Source Sync
Input/Output
A20#
A10
Source Sync
Input/Output
A21#
B10
Source Sync
Input/Output
A22#
B11
Source Sync
Input/Output
A23#
C12
Source Sync
Input/Output
A24#
E14
Source Sync
Input/Output
A25#
D13
Source Sync
Input/Output
A26#
A9
Source Sync
Input/Output
A27#
B8
Source Sync
Input/Output
A28#
E13
Source Sync
Input/Output
A29#
D12
Source Sync
Input/Output
A30#
C11
Source Sync
Input/Output
A31#
B7
Source Sync
Input/Output
A32#
A6
Source Sync
Input/Output
A33#
A7
Source Sync
Input/Output
A34#
C9
Source Sync
Input/Output
A35#
C8
Source Sync
Input/Output
A20M#
F27
Async GTL+
Input
ADS#
D19
Common Clk
Input/Output
ADSTB0#
F17
Source Sync
Input/Output
ADSTB1#
F14
Source Sync
Input/Output
AP0#
E10
Common Clk
Input/Output
AP1#
D9
Common Clk
Input/Output
BCLK0
Y4
Sys Bus Clk
Input
BCLK1
W5
Sys Bus Clk
Input
BINIT#
F11
Common Clk
Input/Output
BNR#
F20
Common Clk
Input/Output
BPM0#
F6
Common Clk
Input/Output
BPM1#
F8
Common Clk
Input/Output
BPM2#
E7
Common Clk
Input/Output
BPM3#
F5
Common Clk
Input/Output
BPM4#
E8
Common Clk
Input/Output
BPM5#
E4
Common Clk
Input/Output
BPRI#
D23
Common Clk
Input
BR0#
D20
Common Clk
Input/Output
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
4.0
Pin Listing and Signal Definitions
4.1
Processor Pin Assignments
Section 2.8
contains the front side bus signal groups in
Table 4
for the Intel
®
XeonTM Processor with
533 MHz Front Side Bus. This section provides a sorted pin list in
Table 38
and
Table 39
.
Table 38
is
a listing of all processor pins ordered alphabetically by pin name.
Table 39
is a listing of all processor
pins ordered by pin number.
4.1.1
Pin Listing by Pin Name
Intel® XeonTM Processor with 533MHz Front Side Bus
42
Datasheet
BR1#
F12
Common Clk
Input
BR2#
1
E11
Common Clk
Input
BR3#
1
D10
Common Clk
Input
BSEL0
AA3
Power/Other
Output
2
BSEL1
AB3
Power/Other
Output
2
COMP0
AD16
Power/Other
Input
COMP1
E16
Power/Other
Input
D0#
Y26
Source Sync
Input/Output
D1#
AA27
Source Sync
Input/Output
D2#
Y24
Source Sync
Input/Output
D3#
AA25
Source Sync
Input/Output
D4#
AD27
Source Sync
Input/Output
D5#
Y23
Source Sync
Input/Output
D6#
AA24
Source Sync
Input/Output
D7#
AB26
Source Sync
Input/Output
D8#
AB25
Source Sync
Input/Output
D9#
AB23
Source Sync
Input/Output
D10#
AA22
Source Sync
Input/Output
D11#
AA21
Source Sync
Input/Output
D12#
AB20
Source Sync
Input/Output
D13#
AB22
Source Sync
Input/Output
D14#
AB19
Source Sync
Input/Output
D15#
AA19
Source Sync
Input/Output
D16#
AE26
Source Sync
Input/Output
D17#
AC26
Source Sync
Input/Output
D18#
AD25
Source Sync
Input/Output
D19#
AE25
Source Sync
Input/Output
D20#
AC24
Source Sync
Input/Output
D21#
AD24
Source Sync
Input/Output
D22#
AE23
Source Sync
Input/Output
D23#
AC23
Source Sync
Input/Output
D24#
AA18
Source Sync
Input/Output
D25#
AC20
Source Sync
Input/Output
D26#
AC21
Source Sync
Input/Output
D27#
AE22
Source Sync
Input/Output
D28#
AE20
Source Sync
Input/Output
D29#
AD21
Source Sync
Input/Output
D30#
AD19
Source Sync
Input/Output
D31#
AB17
Source Sync
Input/Output
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
D32#
AB16
Source Sync
Input/Output
D33#
AA16
Source Sync
Input/Output
D34#
AC17
Source Sync
Input/Output
D35#
AE13
Source Sync
Input/Output
D36#
AD18
Source Sync
Input/Output
D37#
AB15
Source Sync
Input/Output
D38#
AD13
Source Sync
Input/Output
D39#
AD14
Source Sync
Input/Output
D40#
AD11
Source Sync
Input/Output
D41#
AC12
Source Sync
Input/Output
D42#
AE10
Source Sync
Input/Output
D43#
AC11
Source Sync
Input/Output
D44#
AE9
Source Sync
Input/Output
D45#
AD10
Source Sync
Input/Output
D46#
AD8
Source Sync
Input/Output
D47#
AC9
Source Sync
Input/Output
D48#
AA13
Source Sync
Input/Output
D49#
AA14
Source Sync
Input/Output
D50#
AC14
Source Sync
Input/Output
D51#
AB12
Source Sync
Input/Output
D52#
AB13
Source Sync
Input/Output
D53#
AA11
Source Sync
Input/Output
D54#
AA10
Source Sync
Input/Output
D55#
AB10
Source Sync
Input/Output
D56#
AC8
Source Sync
Input/Output
D57#
AD7
Source Sync
Input/Output
D58#
AE7
Source Sync
Input/Output
D59#
AC6
Source Sync
Input/Output
D60#
AC5
Source Sync
Input/Output
D61#
AA8
Source Sync
Input/Output
D62#
Y9
Source Sync
Input/Output
D63#
AB6
Source Sync
Input/Output
DBSY#
F18
Common Clk
Input/Output
DEFER#
C23
Common Clk
Input
DBI0#
AC27
Source Sync
Input/Output
DBI1#
AD22
Source Sync
Input/Output
DBI2#
AE12
Source Sync
Input/Output
DBI3#
AB9
Source Sync
Input/Output
DP0#
AC18
Common Clk
Input/Output
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
Intel® XeonTM Processor with 533MHz Front Side Bus
Datasheet
43
DP1#
AE19
Common Clk
Input/Output
DP2#
AC15
Common Clk
Input/Output
DP3#
AE17
Common Clk
Input/Output
DRDY#
E18
Common Clk
Input/Output
DSTBN0#
Y21
Source Sync
Input/Output
DSTBN1#
Y18
Source Sync
Input/Output
DSTBN2#
Y15
Source Sync
Input/Output
DSTBN3#
Y12
Source Sync
Input/Output
DSTBP0#
Y20
Source Sync
Input/Output
DSTBP1#
Y17
Source Sync
Input/Output
DSTBP2#
Y14
Source Sync
Input/Output
DSTBP3#
Y11
Source Sync
Input/Output
FERR#
E27
Async GTL+
Output
GTLREF
W23
Power/Other
Input
GTLREF
W9
Power/Other
Input
GTLREF
F23
Power/Other
Input
GTLREF
F9
Power/Other
Input
HIT#
E22
Common Clk
Input/Output
HITM#
A23
Common Clk
Input/Output
IERR#
E5
Async GTL+
Output
IGNNE#
C26
Async GTL+
Input
INIT#
D6
Async GTL+
Input
LINT0
B24
Async GTL+
Input
LINT1
G23
Async GTL+
Input
LOCK#
A17
Common Clk
Input/Output
MCERR#
D7
Common Clk
Input/Output
ODTEN
B5
Power/Other
Input
PROCHOT#
B25
Async GTL+
Output
PWRGOOD
AB7
Async GTL+
Input
REQ0#
B19
Source Sync
Input/Output
REQ1#
B21
Source Sync
Input/Output
REQ2#
C21
Source Sync
Input/Output
REQ3#
C20
Source Sync
Input/Output
REQ4#
B22
Source Sync
Input/Output
Reserved
A1
Reserved
Reserved
Reserved
A4
Reserved
Reserved
Reserved
A15
Reserved
Reserved
Reserved
A16
Reserved
Reserved
Reserved
A26
Reserved
Reserved
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
Reserved
B1
Reserved
Reserved
Reserved
C5
Reserved
Reserved
Reserved
D25
Reserved
Reserved
Reserved
W3
Reserved
Reserved
Reserved
Y3
Reserved
Reserved
THERMDA
Y27
Anode Pin
Output
THERMDC
Y28
Cathode Pin
Output
Reserved
AC1
Reserved
Reserved
Reserved
AD1
Reserved
Reserved
SMB_PRT
AE4
Ground
VSS
Reserved
AE15
Reserved
Reserved
Reserved
AE16
Reserved
Reserved
RESET#
Y8
Common Clk
Input
RS0#
E21
Common Clk
Input
RS1#
D22
Common Clk
Input
RS2#
F21
Common Clk
Input
RSP#
C6
Common Clk
Input
SKTOCC#
A3
Power/Other
Output
SLP#
AE6
Async GTL+
Input
NC
AD28
Reserved
NC
AC28
Reserved
NC
AC29
Reserved
NC
AA29
Reserved
NC
AB29
Reserved
NC
AB28
Reserved
NC
AA28
Reserved
NC
Y29
Reserved
NC
AE28
Reserved
NC
AE29
Reserved
NC
AD29
Reserved
SMI#
C27
Async GTL+
Input
STPCLK#
D4
Async GTL+
Input
TCK
E24
TAP
Input
TDI
C24
TAP
Input
TDO
E25
TAP
Output
TESTHI0
W6
Power/Other
Input
TESTHI1
W7
Power/Other
Input
TESTHI2
W8
Power/Other
Input
TESTHI3
Y6
Power/Other
Input
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
1
Intel® XeonTM Processor with 533MHz Front Side Bus
44
Datasheet
TESTHI4
AA7
Power/Other
Input
TESTHI5
AD5
Power/Other
Input
TESTHI6
AE5
Power/Other
Input
THERMTRIP#
F26
Async GTL+
Output
TMS
A25
TAP
Input
TRDY#
E19
Common Clk
Input
TRST#
F24
TAP
Input
VCC
A2
Power/Other
VCC
A8
Power/Other
VCC
A14
Power/Other
VCC
A18
Power/Other
VCC
A24
Power/Other
VCC
A28
Power/Other
VCC
A30
Power/Other
VCC
B4
Power/Other
VCC
B6
Power/Other
VCC
B12
Power/Other
VCC
B20
Power/Other
VCC
B26
Power/Other
VCC
B29
Power/Other
VCC
B31
Power/Other
VCC
C2
Power/Other
VCC
C4
Power/Other
VCC
C10
Power/Other
VCC
C16
Power/Other
VCC
C22
Power/Other
VCC
C28
Power/Other
VCC
C30
Power/Other
VCC
D1
Power/Other
VCC
D8
Power/Other
VCC
D14
Power/Other
VCC
D18
Power/Other
VCC
D24
Power/Other
VCC
D29
Power/Other
VCC
D31
Power/Other
VCC
E2
Power/Other
VCC
E6
Power/Other
VCC
E12
Power/Other
VCC
E20
Power/Other
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
VCC
E26
Power/Other
VCC
E28
Power/Other
VCC
E30
Power/Other
VCC
F1
Power/Other
VCC
F4
Power/Other
VCC
F10
Power/Other
VCC
F16
Power/Other
VCC
F22
Power/Other
VCC
F29
Power/Other
VCC
F31
Power/Other
VCC
G2
Power/Other
VCC
G4
Power/Other
VCC
G6
Power/Other
VCC
G8
Power/Other
VCC
G24
Power/Other
VCC
G26
Power/Other
VCC
G28
Power/Other
VCC
G30
Power/Other
VCC
H1
Power/Other
VCC
H3
Power/Other
VCC
H5
Power/Other
VCC
H7
Power/Other
VCC
H9
Power/Other
VCC
H23
Power/Other
VCC
H25
Power/Other
VCC
H27
Power/Other
VCC
H29
Power/Other
VCC
H31
Power/Other
VCC
J2
Power/Other
VCC
J4
Power/Other
VCC
J6
Power/Other
VCC
J8
Power/Other
VCC
J24
Power/Other
VCC
J26
Power/Other
VCC
J28
Power/Other
VCC
J30
Power/Other
VCC
K1
Power/Other
VCC
K3
Power/Other
VCC
K5
Power/Other
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
Intel® XeonTM Processor with 533MHz Front Side Bus
Datasheet
45
VCC
K7
Power/Other
VCC
K9
Power/Other
VCC
K23
Power/Other
VCC
K25
Power/Other
VCC
K27
Power/Other
VCC
K29
Power/Other
VCC
K31
Power/Other
VCC
L2
Power/Other
VCC
L4
Power/Other
VCC
L6
Power/Other
VCC
L8
Power/Other
VCC
L24
Power/Other
VCC
L26
Power/Other
VCC
L28
Power/Other
VCC
L30
Power/Other
VCC
M1
Power/Other
VCC
M3
Power/Other
VCC
M5
Power/Other
VCC
M7
Power/Other
VCC
M9
Power/Other
VCC
M23
Power/Other
VCC
M25
Power/Other
VCC
M27
Power/Other
VCC
M29
Power/Other
VCC
M31
Power/Other
VCC
N1
Power/Other
VCC
N3
Power/Other
VCC
N5
Power/Other
VCC
N7
Power/Other
VCC
N9
Power/Other
VCC
N23
Power/Other
VCC
N25
Power/Other
VCC
N27
Power/Other
VCC
N29
Power/Other
VCC
N31
Power/Other
VCC
P2
Power/Other
VCC
P4
Power/Other
VCC
P6
Power/Other
VCC
P8
Power/Other
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
VCC
P24
Power/Other
VCC
P26
Power/Other
VCC
P28
Power/Other
VCC
P30
Power/Other
VCC
R1
Power/Other
VCC
R3
Power/Other
VCC
R5
Power/Other
VCC
R7
Power/Other
VCC
R9
Power/Other
VCC
R23
Power/Other
VCC
R25
Power/Other
VCC
R27
Power/Other
VCC
R29
Power/Other
VCC
R31
Power/Other
VCC
T2
Power/Other
VCC
T4
Power/Other
VCC
T6
Power/Other
VCC
T8
Power/Other
VCC
T24
Power/Other
VCC
T26
Power/Other
VCC
T28
Power/Other
VCC
T30
Power/Other
VCC
U1
Power/Other
VCC
U3
Power/Other
VCC
U5
Power/Other
VCC
U7
Power/Other
VCC
U9
Power/Other
VCC
U23
Power/Other
VCC
U25
Power/Other
VCC
U27
Power/Other
VCC
U29
Power/Other
VCC
U31
Power/Other
VCC
V2
Power/Other
VCC
V4
Power/Other
VCC
V6
Power/Other
VCC
V8
Power/Other
VCC
V24
Power/Other
VCC
V26
Power/Other
VCC
V28
Power/Other
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
Intel® XeonTM Processor with 533MHz Front Side Bus
46
Datasheet
VCC
V30
Power/Other
VCC
W1
Power/Other
VCC
W25
Power/Other
VCC
W27
Power/Other
VCC
W29
Power/Other
VCC
W31
Power/Other
VCC
Y10
Power/Other
VCC
Y16
Power/Other
VCC
Y2
Power/Other
VCC
Y22
Power/Other
VCC
Y30
Power/Other
VCC
AA1
Power/Other
VCC
AA4
Power/Other
VCC
AA6
Power/Other
VCC
AA12
Power/Other
VCC
AA20
Power/Other
VCC
AA26
Power/Other
VCC
AA31
Power/Other
VCC
AB2
Power/Other
VCC
AB8
Power/Other
VCC
AB14
Power/Other
VCC
AB18
Power/Other
VCC
AB24
Power/Other
VCC
AB30
Power/Other
VCC
AC3
Power/Other
VCC
AC4
Power/Other
VCC
AC10
Power/Other
VCC
AC16
Power/Other
VCC
AC22
Power/Other
VCC
AC31
Power/Other
VCC
AD2
Power/Other
VCC
AD6
Power/Other
VCC
AD12
Power/Other
VCC
AD20
Power/Other
VCC
AD26
Power/Other
VCC
AD30
Power/Other
VCC
AE3
Power/Other
VCC
AE8
Power/Other
VCC
AE14
Power/Other
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
VCC
AE18
Power/Other
VCC
AE24
Power/Other
VCCA
AB4
Power/Other
Input
VCCIOPLL
AD4
Power/Other
Input
VCCSENSE
B27
Power/Other
Output
VID0
F3
Power/Other
Output
VID1
E3
Power/Other
Output
VID2
D3
Power/Other
Output
VID3
C3
Power/Other
Output
VID4
B3
Power/Other
Output
VSS
A5
Power/Other
VSS
A11
Power/Other
VSS
A21
Power/Other
VSS
A27
Power/Other
VSS
A29
Power/Other
VSS
A31
Power/Other
VSS
B2
Power/Other
VSS
B9
Power/Other
VSS
B15
Power/Other
VSS
B17
Power/Other
VSS
B23
Power/Other
VSS
B28
Power/Other
VSS
B30
Power/Other
VSS
C1
Power/Other
VSS
C7
Power/Other
VSS
C13
Power/Other
VSS
C19
Power/Other
VSS
C25
Power/Other
VSS
C29
Power/Other
VSS
C31
Power/Other
VSS
D2
Power/Other
VSS
D5
Power/Other
VSS
D11
Power/Other
VSS
D21
Power/Other
VSS
D27
Power/Other
VSS
D28
Power/Other
VSS
D30
Power/Other
VSS
E1
Power/Other
VSS
E9
Power/Other
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
Intel® XeonTM Processor with 533MHz Front Side Bus
Datasheet
47
VSS
E15
Power/Other
VSS
E17
Power/Other
VSS
E23
Power/Other
VSS
E29
Power/Other
VSS
E31
Power/Other
VSS
F2
Power/Other
VSS
F7
Power/Other
VSS
F13
Power/Other
VSS
F19
Power/Other
VSS
F25
Power/Other
VSS
F28
Power/Other
VSS
F30
Power/Other
VSS
G1
Power/Other
VSS
G3
Power/Other
VSS
G5
Power/Other
VSS
G7
Power/Other
VSS
G9
Power/Other
VSS
G25
Power/Other
VSS
G27
Power/Other
VSS
G29
Power/Other
VSS
G31
Power/Other
VSS
H2
Power/Other
VSS
H4
Power/Other
VSS
H6
Power/Other
VSS
H8
Power/Other
VSS
H24
Power/Other
VSS
H26
Power/Other
VSS
H28
Power/Other
VSS
H30
Power/Other
VSS
J1
Power/Other
VSS
J3
Power/Other
VSS
J5
Power/Other
VSS
J7
Power/Other
VSS
J9
Power/Other
VSS
J23
Power/Other
VSS
J25
Power/Other
VSS
J27
Power/Other
VSS
J29
Power/Other
VSS
J31
Power/Other
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
VSS
K2
Power/Other
VSS
K4
Power/Other
VSS
K6
Power/Other
VSS
K8
Power/Other
VSS
K24
Power/Other
VSS
K26
Power/Other
VSS
K28
Power/Other
VSS
K30
Power/Other
VSS
L1
Power/Other
VSS
L3
Power/Other
VSS
L5
Power/Other
VSS
L7
Power/Other
VSS
L9
Power/Other
VSS
L23
Power/Other
VSS
L25
Power/Other
VSS
L27
Power/Other
VSS
L29
Power/Other
VSS
L31
Power/Other
VSS
M2
Power/Other
VSS
M4
Power/Other
VSS
M6
Power/Other
VSS
M8
Power/Other
VSS
M24
Power/Other
VSS
M26
Power/Other
VSS
M28
Power/Other
VSS
M30
Power/Other
VSS
N2
Power/Other
VSS
N4
Power/Other
VSS
N6
Power/Other
VSS
N8
Power/Other
VSS
N24
Power/Other
VSS
N26
Power/Other
VSS
N28
Power/Other
VSS
N30
Power/Other
VSS
P1
Power/Other
VSS
P3
Power/Other
VSS
P5
Power/Other
VSS
P7
Power/Other
VSS
P9
Power/Other
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
Intel® XeonTM Processor with 533MHz Front Side Bus
48
Datasheet
VSS
P23
Power/Other
VSS
P25
Power/Other
VSS
P27
Power/Other
VSS
P29
Power/Other
VSS
P31
Power/Other
VSS
R2
Power/Other
VSS
R4
Power/Other
VSS
R6
Power/Other
VSS
R8
Power/Other
VSS
R24
Power/Other
VSS
R26
Power/Other
VSS
R28
Power/Other
VSS
R30
Power/Other
VSS
T1
Power/Other
VSS
T3
Power/Other
VSS
T5
Power/Other
VSS
T7
Power/Other
VSS
T9
Power/Other
VSS
T23
Power/Other
VSS
T25
Power/Other
VSS
T27
Power/Other
VSS
T29
Power/Other
VSS
T31
Power/Other
VSS
U2
Power/Other
VSS
U4
Power/Other
VSS
U6
Power/Other
VSS
U8
Power/Other
VSS
U24
Power/Other
VSS
U26
Power/Other
VSS
U28
Power/Other
VSS
U30
Power/Other
VSS
V1
Power/Other
VSS
V3
Power/Other
VSS
V5
Power/Other
VSS
V7
Power/Other
VSS
V9
Power/Other
VSS
V23
Power/Other
VSS
V25
Power/Other
VSS
V27
Power/Other
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
VSS
V29
Power/Other
VSS
V31
Power/Other
VSS
W2
Power/Other
VSS
W4
Power/Other
VSS
W24
Power/Other
VSS
W26
Power/Other
VSS
W28
Power/Other
VSS
W30
Power/Other
VSS
Y1
Power/Other
VSS
Y5
Power/Other
VSS
Y7
Power/Other
VSS
Y13
Power/Other
VSS
Y19
Power/Other
VSS
Y25
Power/Other
VSS
Y31
Power/Other
VSS
AA2
Power/Other
VSS
AA9
Power/Other
VSS
AA15
Power/Other
VSS
AA17
Power/Other
VSS
AA23
Power/Other
VSS
AA30
Power/Other
VSS
AB1
Power/Other
VSS
AB5
Power/Other
VSS
AB11
Power/Other
VSS
AB21
Power/Other
VSS
AB27
Power/Other
VSS
AB31
Power/Other
VSS
AC2
Power/Other
VSS
AC7
Power/Other
VSS
AC13
Power/Other
VSS
AC19
Power/Other
VSS
AC25
Power/Other
VSS
AC30
Power/Other
VSS
AD3
Power/Other
VSS
AD9
Power/Other
VSS
AD15
Power/Other
VSS
AD17
Power/Other
VSS
AD23
Power/Other
VSS
AD31
Power/Other
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
Intel® XeonTM Processor with 533MHz Front Side Bus
Datasheet
49
1. In systems utilizing the Intel Xeon processor, the system
designer must pull-up these signals to the processor VCC
2. Baseboard treating AA3 and AB3 as Reserved will operate
correctly with a bus clock of 133 MHz.
VSS
AE2
Power/Other
VSS
AE11
Power/Other
VSS
AE21
Power/Other
VSS
AE27
Power/Other
VSSA
AA5
Power/Other
Input
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
VSSSENSE
D26
Power/Other
Output
Table 38. Pin Listing by Pin Name
Pin Name
Pin No.
Signal
Buffer Type
Direction
Intel® XeonTM Processor with 533MHz Front Side Bus
50
Datasheet
4.1.2
Pin Listing by Pin Number
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
A1
Reserved
Reserved
Reserved
A2
VCC
Power/Other
A3
SKTOCC#
Power/Other
Output
A4
Reserved
Reserved
Reserved
A5
VSS
Power/Other
A6
A32#
Source Sync
Input/Output
A7
A33#
Source Sync
Input/Output
A8
VCC
Power/Other
A9
A26#
Source Sync
Input/Output
A10
A20#
Source Sync
Input/Output
A11
VSS
Power/Other
A12
A14#
Source Sync
Input/Output
A13
A10#
Source Sync
Input/Output
A14
VCC
Power/Other
A15
Reserved
Reserved
Reserved
A16
Reserved
Reserved
Reserved
A17
LOCK#
Common Clk
Input/Output
A18
VCC
Power/Other
A19
A7#
Source Sync
Input/Output
A20
A4#
Source Sync
Input/Output
A21
VSS
Power/Other
A22
A3#
Source Sync
Input/Output
A23
HITM#
Common Clk
Input/Output
A24
VCC
Power/Other
A25
TMS
TAP
Input
A26
Reserved
Reserved
Reserved
A27
VSS
Power/Other
A28
VCC
Power/Other
A29
VSS
Power/Other
A30
VCC
Power/Other
A31
VSS
Power/Other
B1
Reserved
Reserved
Reserved
B2
VSS
Power/Other
B3
VID4
Power/Other
Output
B4
VCC
Power/Other
B5
OTDEN
Power/Other
Input
B6
VCC
Power/Other
B7
A31#
Source Sync
Input/Output
B8
A27#
Source Sync
Input/Output
B9
VSS
Power/Other
B10
A21#
Source Sync
Input/Output
B11
A22#
Source Sync
Input/Output
B12
VCC
Power/Other
B13
A13#
Source Sync
Input/Output
B14
A12#
Source Sync
Input/Output
B15
VSS
Power/Other
B16
A11#
Source Sync
Input/Output
B17
VSS
Power/Other
B18
A5#
Source Sync
Input/Output
B19
REQ0#
Common Clk
Input/Output
B20
VCC
Power/Other
B21
REQ1#
Common Clk
Input/Output
B22
REQ4#
Common Clk
Input/Output
B23
VSS
Power/Other
B24
LINT0
Async GTL+
Input
B25
PROCHOT#
Power/Other
Output
B26
VCC
Power/Other
B27
VCCSENSE
Power/Other
Output
B28
VSS
Power/Other
B29
VCC
Power/Other
B30
VSS
Power/Other
B31
VCC
Power/Other
C1
VSS
Power/Other
C2
VCC
Power/Other
C3
VID3
Power/Other
Output
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
Intel® XeonTM Processor with 533MHz Front Side Bus
Datasheet
51
C4
VCC
Power/Other
C5
Reserved
Reserved
Reserved
C6
RSP#
Common
Clk
Input
C7
VSS
Power/Other
C8
A35#
Source Sync
Input/Output
C9
A34#
Source Sync
Input/Output
C10
VCC
Power/Other
C11
A30#
Source Sync
Input/Output
C12
A23#
Source Sync
Input/Output
C13
VSS
Power/Other
C14
A16#
Source Sync
Input/Output
C15
A15#
Source Sync
Input/Output
C16
VCC
Power/Other
C17
A8#
Source Sync
Input/Output
C18
A6#
Source Sync
Input/Output
C19
VSS
Power/Other
C20
REQ3#
Common Clk
Input/Output
C21
REQ2#
Common Clk
Input/Output
C22
VCC
Power/Other
C23
DEFER#
Common Clk
Input
C24
TDI
TAP
Input
C25
VSS
Power/Other
Input
C26
IGNNE#
Async GTL+
Input
C27
SMI#
Async GTL+
Input
C28
VCC
Power/Other
C29
VSS
Power/Other
C30
VCC
Power/Other
C31
VSS
Power/Other
D1
VCC
Power/Other
D2
VSS
Power/Other
D3
VID2
Power/Other
Output
D4
STPCLK#
Async GTL+
Input
D5
VSS
Power/Other
D6
INIT#
Async GTL+
Input
D7
MCERR#
Common Clk
Input/Output
D8
VCC
Power/Other
D9
AP1#
Common Clk
Input/Output
D10
BR3#
1
Common Clk
Input
D11
VSS
Power/Other
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
D12
A29#
Source Sync
Input/Output
D13
A25#
Source Sync
Input/Output
D14
VCC
Power/Other
D15
A18#
Source Sync
Input/Output
D16
A17#
Source Sync
Input/Output
D17
A9#
Source Sync
Input/Output
D18
VCC
Power/Other
D19
ADS#
Common
Clk
Input/Output
D20
BR0#
Common
Clk
Input/Output
D21
VSS
Power/Other
D22
RS1#
Common Clk
Input
D23
BPRI#
Common Clk
Input
D24
VCC
Power/Other
D25
Reserved
Reserved
Reserved
D26
VSSSENSE
Power/Other
Output
D27
VSS
Power/Other
D28
VSS
Power/Other
D29
VCC
Power/Other
D30
VSS
Power/Other
D31
VCC
Power/Other
E1
VSS
Power/Other
E2
VCC
Power/Other
E3
VID1
Power/Other
Output
E4
BPM5#
Common Clk
Input/Output
E5
IERR#
Common Clk
Output
E6
VCC
Power/Other
E7
BPM2#
Common Clk
Input/Output
E8
BPM4#
Common Clk
Input/Output
E9
VSS
Power/Other
E10
AP0#
Common Clk
Input/Output
E11
BR2#
1
Common Clk
Input
E12
VCC
Power/Other
E13
A28#
Source Sync
Input/Output
E14
A24#
Source Sync
Input/Output
E15
VSS
Power/Other
E16
COMP1
Power/Other
Input
E17
VSS
Power/Other
E18
DRDY#
Common Clk
Input/Output
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
Intel® XeonTM Processor with 533MHz Front Side Bus
52
Datasheet
E19
TRDY#
Common Clk
Input
E20
VCC
Power/Other
E21
RS0#
Common Clk
Input
E22
HIT#
Common Clk
Input/Output
E23
VSS
Power/Other
E24
TCK
TAP
Input
E25
TDO
TAP
Output
E26
VCC
Power/Other
E27
FERR#
Async GTL+
Output
E28
VCC
Power/Other
E29
VSS
Power/Other
E30
VCC
Power/Other
E31
VSS
Power/Other
F1
VCC
Power/Other
F2
VSS
Power/Other
F3
VID0
Power/Other
Output
F4
VCC
Power/Other
F5
BPM3#
Common Clk
Input/Output
F6
BPM0#
Common Clk
Input/Output
F7
VSS
Power/Other
F8
BPM1#
Common Clk
Input/Output
F9
GTLREF
Power/Other
Input
F10
VCC
Power/Other
F11
BINIT#
Common Clk
Input/Output
F12
BR1#
Common Clk
Input
F13
VSS
Power/Other
F14
ADSTB1#
Source Sync
Input/Output
F15
A19#
Source Sync
Input/Output
F16
VCC
Power/Other
F17
ADSTB0#
Source Sync
Input/Output
F18
DBSY#
Common Clk
Input/Output
F19
VSS
Power/Other
F20
BNR#
Common Clk
Input/Output
F21
RS2#
Common Clk
Input
F22
VCC
Power/Other
F23
GTLREF
Power/Other
Input
F24
TRST#
TAP
Input
F25
VSS
Power/Other
F26
THERMTRIP
#
Async GTL+
Output
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
F27
A20M#
Async GTL+
Input
F28
VSS
Power/Other
F29
VCC
Power/Other
F30
VSS
Power/Other
F31
VCC
Power/Other
G1
VSS
Power/Other
G2
VCC
Power/Other
G3
VSS
Power/Other
G4
VCC
Power/Other
G5
VSS
Power/Other
G6
VCC
Power/Other
G7
VSS
Power/Other
G8
VCC
Power/Other
G9
VSS
Power/Other
G23
LINT1
Async GTL+
Input
G24
VCC
Power/Other
G25
VSS
Power/Other
G26
VCC
Power/Other
G27
VSS
Power/Other
G28
VCC
Power/Other
G29
VSS
Power/Other
G30
VCC
Power/Other
G31
VSS
Power/Other
H1
VCC
Power/Other
H2
VSS
Power/Other
H3
VCC
Power/Other
H4
VSS
Power/Other
H5
VCC
Power/Other
H6
VSS
Power/Other
H7
VCC
Power/Other
H8
VSS
Power/Other
H9
VCC
Power/Other
H23
VCC
Power/Other
H24
VSS
Power/Other
H25
VCC
Power/Other
H26
VSS
Power/Other
H27
VCC
Power/Other
H28
VSS
Power/Other
H29
VCC
Power/Other
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
Intel® XeonTM Processor with 533MHz Front Side Bus
Datasheet
53
H30
VSS
Power/Other
H31
VCC
Power/Other
J1
VSS
Power/Other
J2
VCC
Power/Other
J3
VSS
Power/Other
J4
VCC
Power/Other
J5
VSS
Power/Other
J6
VCC
Power/Other
J7
VSS
Power/Other
J8
VCC
Power/Other
J9
VSS
Power/Other
J23
VSS
Power/Other
J24
VCC
Power/Other
J25
VSS
Power/Other
J26
VCC
Power/Other
J27
VSS
Power/Other
J28
VCC
Power/Other
J29
VSS
Power/Other
J30
VCC
Power/Other
J31
VSS
Power/Other
K1
VCC
Power/Other
K2
VSS
Power/Other
K3
VCC
Power/Other
K4
VSS
Power/Other
K5
VCC
Power/Other
K6
VSS
Power/Other
K7
VCC
Power/Other
K8
VSS
Power/Other
K9
VCC
Power/Other
K23
VCC
Power/Other
K24
VSS
Power/Other
K25
VCC
Power/Other
K26
VSS
Power/Other
K27
VCC
Power/Other
K28
VSS
Power/Other
K29
VCC
Power/Other
K30
VSS
Power/Other
K31
VCC
Power/Other
L1
VSS
Power/Other
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
L2
VCC
Power/Other
L3
VSS
Power/Other
L4
VCC
Power/Other
L5
VSS
Power/Other
L6
VCC
Power/Other
L7
VSS
Power/Other
L8
VCC
Power/Other
L9
VSS
Power/Other
L23
VSS
Power/Other
L24
VCC
Power/Other
L25
VSS
Power/Other
L26
VCC
Power/Other
L27
VSS
Power/Other
L28
VCC
Power/Other
L29
VSS
Power/Other
L30
VCC
Power/Other
L31
VSS
Power/Other
M1
VCC
Power/Other
M2
VSS
Power/Other
M3
VCC
Power/Other
M4
VSS
Power/Other
M5
VCC
Power/Other
M6
VSS
Power/Other
M7
VCC
Power/Other
M8
VSS
Power/Other
M9
VCC
Power/Other
M23
VCC
Power/Other
M24
VSS
Power/Other
M25
VCC
Power/Other
M26
VSS
Power/Other
M27
VCC
Power/Other
M28
VSS
Power/Other
M29
VCC
Power/Other
M30
VSS
Power/Other
M31
VCC
Power/Other
N1
VCC
Power/Other
N2
VSS
Power/Other
N3
VCC
Power/Other
N4
VSS
Power/Other
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
Intel® XeonTM Processor with 533MHz Front Side Bus
54
Datasheet
N5
VCC
Power/Other
N6
VSS
Power/Other
N7
VCC
Power/Other
N8
VSS
Power/Other
N9
VCC
Power/Other
N23
VCC
Power/Other
N24
VSS
Power/Other
N25
VCC
Power/Other
N26
VSS
Power/Other
N27
VCC
Power/Other
N28
VSS
Power/Other
N29
VCC
Power/Other
N30
VSS
Power/Other
N31
VCC
Power/Other
P1
VSS
Power/Other
P2
VCC
Power/Other
P3
VSS
Power/Other
P4
VCC
Power/Other
P5
VSS
Power/Other
P6
VCC
Power/Other
P7
VSS
Power/Other
P8
VCC
Power/Other
P9
VSS
Power/Other
P23
VSS
Power/Other
P24
VCC
Power/Other
P25
VSS
Power/Other
P26
VCC
Power/Other
P27
VSS
Power/Other
P28
VCC
Power/Other
P29
VSS
Power/Other
P30
VCC
Power/Other
P31
VSS
Power/Other
R1
VCC
Power/Other
R2
VSS
Power/Other
R3
VCC
Power/Other
R4
VSS
Power/Other
R5
VCC
Power/Other
R6
VSS
Power/Other
R7
VCC
Power/Other
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
R8
VSS
Power/Other
R9
VCC
Power/Other
R23
VCC
Power/Other
R24
VSS
Power/Other
R25
VCC
Power/Other
R26
VSS
Power/Other
R27
VCC
Power/Other
R28
VSS
Power/Other
R29
VCC
Power/Other
R30
VSS
Power/Other
R31
VCC
Power/Other
T1
VSS
Power/Other
T2
VCC
Power/Other
T3
VSS
Power/Other
T4
VCC
Power/Other
T5
VSS
Power/Other
T6
VCC
Power/Other
T7
VSS
Power/Other
T8
VCC
Power/Other
T9
VSS
Power/Other
T23
VSS
Power/Other
T24
VCC
Power/Other
T25
VSS
Power/Other
T26
VCC
Power/Other
T27
VSS
Power/Other
T28
VCC
Power/Other
T29
VSS
Power/Other
T30
VCC
Power/Other
T31
VSS
Power/Other
U1
VCC
Power/Other
U2
VSS
Power/Other
U3
VCC
Power/Other
U4
VSS
Power/Other
U5
VCC
Power/Other
U6
VSS
Power/Other
U7
VCC
Power/Other
U8
VSS
Power/Other
U9
VCC
Power/Other
U23
VCC
Power/Other
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
Intel® XeonTM Processor with 533MHz Front Side Bus
Datasheet
55
U24
VSS
Power/Other
U25
VCC
Power/Other
U26
VSS
Power/Other
U27
VCC
Power/Other
U28
VSS
Power/Other
U29
VCC
Power/Other
U30
VSS
Power/Other
U31
VCC
Power/Other
V1
VSS
Power/Other
V2
VCC
Power/Other
V3
VSS
Power/Other
V4
VCC
Power/Other
V5
VSS
Power/Other
V6
VCC
Power/Other
V7
VSS
Power/Other
V8
VCC
Power/Other
V9
VSS
Power/Other
V23
VSS
Power/Other
V24
VCC
Power/Other
V25
VSS
Power/Other
V26
VCC
Power/Other
V27
VSS
Power/Other
V28
VCC
Power/Other
V29
VSS
Power/Other
V30
VCC
Power/Other
V31
VSS
Power/Other
W1
VCC
Power/Other
W2
VSS
Power/Other
W3
Reserved
Reserved
Reserved
W4
VSS
Power/Other
W5
BCLK1
Sys Bus Clk
Input
W6
TESTHI0
Power/Other
Input
W7
TESTHI1
Power/Other
Input
W8
TESTHI2
Power/Other
Input
W9
GTLREF
Power/Other
Input
W23
GTLREF
Power/Other
Input
W24
VSS
Power/Other
W25
VCC
Power/Other
W26
VSS
Power/Other
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
W27
VCC
Power/Other
W28
VSS
Power/Other
W29
VCC
Power/Other
W30
VSS
Power/Other
W31
VCC
Power/Other
Y1
VSS
Power/Other
Y2
VCC
Power/Other
Y3
Reserved
Reserved
Reserved
Y4
BCLK0
Sys Bus Clk
Input
Y5
VSS
Power/Other
Y6
TESTHI3
Power/Other
Input
Y7
VSS
Power/Other
Y8
RESET#
Common Clk
Input
Y9
D62#
Source Sync
Input/Output
Y10
VCC
Power/Other
Y11
DSTBP3#
Source Sync
Input/Output
Y12
DSTBN3#
Source Sync
Input/Output
Y13
VSS
Power/Other
Y14
DSTBP2#
Source Sync
Input/Output
Y15
DSTBN2#
Source Sync
Input/Output
Y16
VCC
Power/Other
Y17
DSTBP1#
Source Sync
Input/Output
Y18
DSTBN1#
Source Sync
Input/Output
Y19
VSS
Power/Other
Y20
DSTBP0#
Source Sync
Input/Output
Y21
DSTBN0#
Source Sync
Input/Output
Y22
VCC
Power/Other
Y23
D5#
Source Sync
Input/Output
Y24
D2#
Source Sync
Input/Output
Y25
VSS
Power/Other
Y26
D0#
Source Sync
Input/Output
Y27
THERMDA
Anode Pin
Output
Y28
THERMDC
Cathode Pin
Output
Y29
NC
Reserved
Y30
VCC
Power/Other
Y31
VSS
Power/Other
AA1
VCC
Power/Other
AA2
VSS
Power/Other
AA3
BSEL0
Power/Other
Output
2
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
Intel® XeonTM Processor with 533MHz Front Side Bus
56
Datasheet
AA4
VCC
Power/Other
AA5
VSSA
Power/Other
Input
AA6
VCC
Power/Other
AA7
TESTHI4
Power/Other
Input
AA8
D61#
Source Sync
Input/Output
AA9
VSS
Power/Other
AA10
D54#
Source Sync
Input/Output
AA11
D53#
Source Sync
Input/Output
AA12
VCC
Power/Other
AA13
D48#
Source Sync
Input/Output
AA14
D49#
Source Sync
Input/Output
AA15
VSS
Power/Other
AA16
D33#
Source Sync
Input/Output
AA17
VSS
Power/Other
AA18
D24#
Source Sync
Input/Output
AA19
D15#
Source Sync
Input/Output
AA20
VCC
Power/Other
AA21
D11#
Source Sync
Input/Output
AA22
D10#
Source Sync
Input/Output
AA23
VSS
Power/Other
AA24
D6#
Source Sync
Input/Output
AA25
D3#
Source Sync
Input/Output
AA26
VCC
Power/Other
AA27
D1#
Source Sync
Input/Output
AA28
NC
Reserved
AA29
NC
Reserved
AA30
VSS
Power/Other
AA31
VCC
Power/Other
AB1
VSS
Power/Other
AB2
VCC
Power/Other
AB3
BSEL1
Power/Other
Output
2
AB4
VCCA
Power/Other
Input
AB5
VSS
Power/Other
AB6
D63#
Source Sync
AB7
PWRGOOD
Power/Other
Input
AB8
VCC
Power/Other
AB9
DBI3#
Source Sync
Input/Output
AB10
D55#
Source Sync
Input/Output
AB11
VSS
Power/Other
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
AB12
D51#
Source Sync
Input/Output
AB13
D52#
Source Sync
Input/Output
AB14
VCC
Power/Other
AB15
D37#
Source Sync
Input/Output
AB16
D32#
Source Sync
Input/Output
AB17
D31#
Source Sync
Input/Output
AB18
VCC
Power/Other
AB19
D14#
Source Sync
Input/Output
AB20
D12#
Source Sync
Input/Output
AB21
VSS
Power/Other
AB22
D13#
Source Sync
Input/Output
AB23
D9#
Source Sync
Input/Output
AB24
VCC
Power/Other
AB25
D8#
Source Sync
Input/Output
AB26
D7#
Source Sync
Input/Output
AB27
VSS
Power/Other
AB28
NC
Reserved
AB29
NC
Reserved
AB30
VCC
Power/Other
AB31
VSS
Power/Other
AC1
Reserved
Reserved
Reserved
AC2
VSS
Power/Other
AC3
VCC
Power/Other
AC4
VCC
Power/Other
AC5
D60#
Source Sync
Input/Output
AC6
D59#
Source Sync
Input/Output
AC7
VSS
Power/Other
AC8
D56#
Source Sync
Input/Output
AC9
D47#
Source Sync
Input/Output
AC10
VCC
Power/Other
AC11
D43#
Source Sync
Input/Output
AC12
D41#
Source Sync
Input/Output
AC13
VSS
Power/Other
AC14
D50#
Source Sync
Input/Output
AC15
DP2#
Common Clk
Input/Output
AC16
VCC
Power/Other
AC17
D34#
Source Sync
Input/Output
AC18
DP0#
Common Clk
Input/Output
AC19
VSS
Power/Other
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
Intel® XeonTM Processor with 533MHz Front Side Bus
Datasheet
57
1. In systems utilizing the Intel Xeon processor, the system
designer must pull-up these signals to the processor VCC.
2. Baseboards treating AA3 and AB3 as Reserved will operate
correctly with a bus clock of 133 MHz.
AC20
D25#
Source Sync
Input/Output
AC21
D26#
Source Sync
Input/Output
AC22
VCC
Power/Other
AC23
D23#
Source Sync
Input/Output
AC24
D20#
Source Sync
Input/Output
AC25
VSS
Power/Other
AC26
D17#
Source Sync
Input/Output
AC27
DBI0#
Source Sync
Input/Output
AC28
NC
Reserved
AC29
NC
Reserved
AC30
VSS
Power/Other
AC31
VCC
Power/Other
AD1
Reserved
Reserved
Reserved
AD2
VCC
Power/Other
AD3
VSS
Power/Other
AD4
VCCIOPLL
Power/Other
Input
AD5
TESTHI5
Power/Other
Input
AD6
VCC
Power/Other
AD7
D57#
Source Sync
Input/Output
AD8
D46#
Source Sync
Input/Output
AD9
VSS
Power/Other
AD10
D45#
Source Sync
Input/Output
AD11
D40#
Source Sync
Input/Output
AD12
VCC
Power/Other
AD13
D38#
Source Sync
Input/Output
AD14
D39#
Source Sync
Input/Output
AD15
VSS
Power/Other
AD16
COMP0
Power/Other
Input
AD17
VSS
Power/Other
AD18
D36#
Source Sync
Input/Output
AD19
D30#
Source Sync
Input/Output
AD20
VCC
Power/Other
AD21
D29#
Source Sync
Input/Output
AD22
DBI1#
Source Sync
Input/Output
AD23
VSS
Power/Other
AD24
D21#
Source Sync
Input/Output
AD25
D18#
Source Sync
Input/Output
AD26
VCC
Power/Other
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
AD27
D4#
Source Sync
Input/Output
AD28
NC
Reserved
AD29
NC
Reserved
AD30
VCC
Power/Other
AD31
VSS
Power/Other
AE2
VSS
Power/Other
AE3
VCC
Power/Other
AE4
SMD_PRT
Ground
Output
AE5
TESTHI6
Power/Other
Input
AE6
SLP#
Async GTL+
Input
AE7
D58#
Source Sync
Input/Output
AE8
VCC
Power/Other
AE9
D44#
Source Sync
Input/Output
AE10
D42#
Source Sync
Input/Output
AE11
VSS
Power/Other
AE12
DBI2#
Source Sync
Input/Output
AE13
D35#
Source Sync
Input/Output
AE14
VCC
Power/Other
AE15
Reserved
Reserved
Reserved
AE16
Reserved
Reserved
Reserved
AE17
DP3#
Common Clk
Input/Output
AE18
VCC
Power/Other
AE19
DP1#
Common Clk
Input/Output
AE20
D28#
Source Sync
Input/Output
AE21
VSS
Power/Other
AE22
D27#
Source Sync
Input/Output
AE23
D22#
Source Sync
Input/Output
AE24
VCC
Power/Other
AE25
D19#
Source Sync
Input/Output
AE26
D16#
Source Sync
Input/Output
AE27
VSS
Power/Other
AE28
VID_V
CC
Power/Other
AE29
VID_V
CC
Power/Other
AE30
Mechanical
Key
Table 39. Pin Listing by Pin Number
Pin No.
Pin Name
Signal
Buffer Type
Direction
58
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
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Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
59
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60
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
4.2
Signal Definitions
Table 41. Signal Definitions (Sheet 1 of 9)
Name
Type
Description
Notes
A[35:3]#
I/O
A[35:3]# (Address) define a 2
36
byte physical memory address space. In sub-phase
1 of the address phase, these pins transmit the address of a transaction. In sub-
phase 2, these pins transmit transaction type information. These signals must
connect the appropriate pins of all agents on the front side bus. A[35:3]# are
protected by parity signals AP[1:0]#. A[35:3]# are source synchronous signals and
are latched into the receiving buffers by ADSTB[1:0]#.
On the active-to-inactive transition of RESET#, the processors sample a subset of
the A[35:3]# pins to determine their power-on configuration. See
Section 6.1
.
4
A20M#
I
If A20M# (Address-20 Mask) is asserted, the processor masks physical address bit
20 (A20#) before looking up a line in any internal cache and before driving a read/
write transaction on the bus. Asserting A20M# emulates the 8086 processor's
address wrap-around at the 1 MByte boundary. Assertion of A20M# is only
supported in real mode.
A20M# is an asynchronous signal. However, to ensure recognition of this signal
following an I/O write instruction, it must be valid along with the TRDY# assertion of
the corresponding I/O write bus transaction.
3
ADS#
I/O
ADS# (Address Strobe) is asserted to indicate the validity of the transaction
address on the A[35:3]# pins. All bus agents observe the ADS# activation to begin
parity checking, protocol checking, address decode, internal snoop, or deferred
reply ID match operations associated with the new transaction. This signal must
connect the appropriate pins on all front side bus agents.
4
ADSTB[1:0]#
I/O
Address strobes are used to latch A[35:3]# and REQ[4:0]# on their rising and falling
edge.
4
AP[1:0]#
I/O
AP[1:0]# (Address Parity) are driven by the request initiator along with ADS#,
A[35:3]#, and the transaction type on the REQ[4:0]# pins. A correct parity signal is
high if an even number of covered signals are low and low if an odd number of
covered signals are low. This allows parity to be high when all the covered signals
are high. AP[1:0]# should connect the appropriate pins of all front side bus agents.
The following table defines the coverage model of these signals.
4
BCLK[1:0]
I
The differential pair BCLK (Bus Clock) determines the bus frequency. All processor
front side bus agents must receive these signals to drive their outputs and latch
their inputs.
All external timing parameters are specified with respect to the rising edge of
BCLK0 crossing the falling edge of BCLK1.
4
Request Signals
Subphase 1
Subphase 2
A[35:24]#
AP0#
AP1#
A[23:3]#
AP1#
AP0#
REQ[4:0]#
AP1#
AP0#
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
61
BINIT#
I/O
BINIT# (Bus Initialization) may be observed and driven by all processor front side
bus agents and if used, must connect the appropriate pins of all such agents. If the
BINIT# driver is enabled during power on configuration, BINIT# is asserted to signal
any bus condition that prevents reliable future information.
If BINIT# observation is enabled during power-on configuration (see
Section 6.1
)
and BINIT# is sampled asserted, symmetric agents reset their bus LOCK# activity
and bus request arbitration state machines. The bus agents do not reset their IOQ
and transaction tracking state machines upon observation of BINIT# assertion.
Once the BINIT# assertion has been observed, the bus agents will re-arbitrate for
the front side bus and attempt completion of their bus queue and IOQ entries.
If BINIT# observation is disabled during power-on configuration, a central agent
may handle an assertion of BINIT# as appropriate to the error handling architecture
of the system.
4
BNR#
I/O
BNR# (Block Next Request) is used to assert a bus stall by any bus agent who is
unable to accept new bus transactions. During a bus stall, the current bus owner
cannot issue any new transactions.
Since multiple agents might need to request a bus stall at the same time, BNR# is a
wire-OR signal which must connect the appropriate pins of all processor front side
bus agents. In order to avoid wire-OR glitches associated with simultaneous edge
transitions driven by multiple drivers, BNR# is activated on specific clock edges and
sampled on specific clock edges.
4
BPM[5:0]#
I/O
BPM[5:0]# (Breakpoint Monitor) are breakpoint and performance monitor signals.
They are outputs from the processor which indicate the status of breakpoints and
programmable counters used for monitoring processor performance. BPM[5:0]#
should connect the appropriate pins of all front side bus agents.
BPM4# provides PRDY# (Probe Ready) functionality for the TAP port. PRDY# is a
processor output used by debug tools to determine processor debug readiness.
BPM5# provides PREQ# (Probe Request) functionality for the TAP port. PREQ# is
used by debug tools to request debug operation of the processors.
BPM[5:4]# must be bussed to all bus agents.
These signals do not have on-die termination and must be terminated at the
end agent. See the appropriate platform design guidelines for additional
information.
3
BPRI#
I
BPRI# (Bus Priority Request) is used to arbitrate for ownership of the processor
front side bus. It must connect the appropriate pins of all processor front side bus
agents. Observing BPRI# active (as asserted by the priority agent) causes all other
agents to stop issuing new requests, unless such requests are part of an ongoing
locked operation. The priority agent keeps BPRI# asserted until all of its requests
are completed, then releases the bus by deasserting BPRI#.
4
Table 41. Signal Definitions (Sheet 2 of 9)
Name
Type
Description
Notes
62
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
BR0#
BR[1:3]#
1
I/O
I
BR[3:0]# (Bus Request) drive the BREQ[3:0]# signals in the system. The
BREQ[3:0]# signals are interconnected in a rotating manner to individual processor
pins. BR2# and BR3# must not be utilized in a dual processor platform design. The
table below gives the rotating interconnect between the processor and bus signals
for dual processor systems.
During power-on configuration, the central agent must assert the BR0# bus signal.
All symmetric agents sample their BR[3:0]# pins on the active-to-inactive transition
of RESET#. The pin which the agent samples asserted determines it's agent ID.
These signals do not have on-die termination and must be terminated at the
end agent. See the appropriate platform design guidelines for additional
information.
1,4
BSEL[1:0]
O
These output signals are used to select the front side bus frequency. A BSEL[1:0] =
"00" will select a 100 MHz bus clock frequency. The frequency is determined by the
processor(s), chipset, and frequency synthesizer capabilities. All front side bus
agents must operate at the same frequency. Individual processors will only operate
at their specified front side bus (FSB) frequency.
On baseboards which support operation only at 100 MHz bus clocks these signals
can be ignored. On baseboards employing the use of these signals, a 1 K
pull-up
resistor be used.
See
Table 2 "Front Side Bus Clock Frequency Select Truth Table for BSEL[1:0]" on
page 13
for output values.
COMP[1:0]
I
COMP[1:0] must be terminated to V
SS
on the baseboard using precision resistors.
These inputs configure the AGTL+ drivers of the processor. Refer to the appropriate
platform design guidelines and
Table 12
for implementation details.
Table 41. Signal Definitions (Sheet 3 of 9)
Name
Type
Description
Notes
BR[1:0]# Signals Rotating Interconnect, dual processor system
During power-up configuration, the central agent must assert the BR0# bus signal.
All symmetric agents sample their BR[1:0]# pins on active-to-inactive transition of
RESET#. The pin on which the agent samples an active level determines its agent
ID. All agents then configure their pins to match the appropriate bus signal protocol
as shown below.
Bus Signal
Agent 0 Pins
Agent 1 Pins
BREQ0#
BR0#
BR1#
BREQ1#
BR1#
BR0#
BR[1:0]# Signal Agent IDs
BR[1:0]# Signals Rotating
Interconnect, dual processor system
Agent ID
BR0#
0
BR1#
1
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
63
D[63:0]#
I/O
D[63:0]# (Data) are the data signals. These signals provide a 64-bit data path
between the processor front side bus agents, and must connect the appropriate
pins on all such agents. The data driver asserts DRDY# to indicate a valid data
transfer.
D[63:0]# are quad-pumped signals, and will thus be driven four times in a common
clock period. D[63:0]# are latched off the falling edge of both DSTBP[3:0]# and
DSTBN[3:0]#. Each group of 16 data signals correspond to a pair of one DSTBP#
and one DSTBN#. The following table shows the grouping of data signals to strobes
and DBI#.
Furthermore, the DBI# pins determine the polarity of the data signals. Each group
of 16 data signals corresponds to one DBI# signal. When the DBI# signal is active,
the corresponding data group is inverted and therefore sampled active high.
4
DBI[3:0]#
I/O
DBI[3:0]# are source synchronous and indicate the polarity of the D[63:0]# signals.
The DBI[3:0]# signals are activated when the data on the data bus is inverted. The
bus agent will invert the data bus signals if more than half the bits, within a 16-bit
group, change logic level in the next cycle.
4
DBSY#
I/O
DBSY# (Data Bus Busy) is asserted by the agent responsible for driving data on the
processor front side bus to indicate that the data bus is in use. The data bus is
released after DBSY# is deasserted. This signal must connect the appropriate pins
on all processor front side bus agents.
4
DEFER#
I
DEFER# is asserted by an agent to indicate that a transaction cannot be
guaranteed in-order completion. Assertion of DEFER# is normally the responsibility
of the addressed memory or I/O agent. This signal must connect the appropriate
pins of all processor front side bus agents.
4
DP[3:0]#
I/O
DP[3:0]# (Data Parity) provide parity protection for the D[63:0]# signals. They are
driven by the agent responsible for driving D[63:0]#, and must connect the
appropriate pins of all processor front side bus agents.
4
DRDY#
I/O
DRDY# (Data Ready) is asserted by the data driver on each data transfer,
indicating valid data on the data bus. In a multi-common clock data transfer, DRDY#
may be deasserted to insert idle clocks. This signal must connect the appropriate
pins of all processor front side bus agents.
4
DSTBN[3:0]#
I/O
Data strobe used to latch in D[63:0]#.
4
DSTBP[3:0]#
I/O
Data strobe used to latch in D[63:0]#.
4
Table 41. Signal Definitions (Sheet 4 of 9)
Name
Type
Description
Notes
Data Group
DSTBN/
DSTBP
DBI#
D[15:0]#
0
0
D[31:16]#
1
1
D[47:32]#
2
2
D[63:48]#
3
3
DBI[3:0] Assignment To Data Bus
Bus Signal
Data Bus Signals
DBI0#
D[15:0]#
DBI1#
D[31:16]#
DBI2#
D[47:32]#
DBI3#
D[63:48]#
64
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
FERR#/PBE#
O
FERR#/PBE# (floating point error/pending break event) is a multiplexed signal and
its meaning is qualified by STPCLK#. When STPCLK# is not asserted, FERR#/
PBE# indicates a floating-point error and will be asserted when the processor
detects an unmasked floating-point error. When STPCLK# is not asserted, FERR#/
PBE# is similar to the ERROR# signal on the Intel 387 coprocessor, and is included
for compatibility with systems using MS-DOS*-type floating-point error reporting.
When STPCLK# is asserted, an assertion of FERR#/PBE# indicates that the
processor has a pending break event waiting for service. The assertion of FERR#/
PBE# indicates that the processor should be returned to the Normal state. For
additional information on the pending break event functionality, including the
identification of support of the feature and enable/disable information, refer to
volume 3 of the Intel Architecture Software Developer's Manual and the Intel
Processor Identification and the CPUID Instruction application note.
This signal does not have on-die termination and must be terminated at the
end agent. See the appropriate Platform Design Guideline for additional
information.
3
GTLREF
I
GTLREF determines the signal reference level for AGTL+ input pins. GTLREF
should be set at 2/3Vcc. GTLREF is used by the AGTL+ receivers to determine if a
signal is a logical 0 or a logical 1.
HIT#
HITM#
I/O
I/O
HIT# (Snoop Hit) and HITM# (Hit Modified) convey transaction snoop operation
results. Any front side bus agent may assert both HIT# and HITM# together to
indicate that it requires a snoop stall, which can be continued by reasserting HIT#
and HITM# together.
Since multiple agents may deliver snoop results at the same time, HIT# and HITM#
are wire-OR signals which must connect the appropriate pins of all processor front
side bus agents. In order to avoid wire-OR glitches associated with simultaneous
edge transitions driven by multiple drivers, HIT# and HITM# are activated on
specific clock edges and sampled on specific clock edges.
4
IERR#
O
IERR# (Internal Error) is asserted by a processor as the result of an internal error.
Assertion of IERR# is usually accompanied by a SHUTDOWN transaction on the
processor front side bus. This transaction may optionally be converted to an
external error signal (e.g., NMI) by system core logic. The processor will keep
IERR# asserted until the assertion of RESET#, BINIT#, or INIT#.
This signal does not have on-die termination and must be terminated at the
end agent. See the appropriate Platform Design Guideline for additional
information.
3
IGNNE#
I
IGNNE# (Ignore Numeric Error) is asserted to force the processor to ignore a
numeric error and continue to execute noncontrol floating-point instructions. If
IGNNE# is deasserted, the processor generates an exception on a noncontrol
floating-point instruction if a previous floating-point instruction caused an error.
IGNNE# has no effect when the NE bit in control register 0 (CR0) is set.
IGNNE# is an asynchronous signal. However, to ensure recognition of this signal
following an I/O write instruction, it must be valid along with the TRDY# assertion of
the corresponding I/O write bus transaction.
3
INIT#
I
INIT# (Initialization), when asserted, resets integer registers inside all processors
without affecting their internal caches or floating-point registers. Each processor
then begins execution at the power-on Reset vector configured during power-on
configuration. The processor continues to handle snoop requests during INIT#
assertion. INIT# is an asynchronous signal and must connect the appropriate pins
of all processor front side bus agents.
If INIT# is sampled active on the active to inactive transition of RESET#, then the
processor executes its Built-in Self-Test (BIST).
3
Table 41. Signal Definitions (Sheet 5 of 9)
Name
Type
Description
Notes
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
65
LINT[1:0]
I
LINT[1:0] (Local APIC Interrupt) must connect the appropriate pins of all front side
bus agents. When the APIC functionality is disabled, the LINT0 signal becomes
INTR, a maskable interrupt request signal, and LINT1 becomes NMI, a
nonmaskable interrupt. INTR and NMI are backward compatible with the signals of
those names on the Pentium processor. Both signals are asynchronous.
Both of these signals must be software configured via BIOS programming of the
APIC register space to be used either as NMI/INTR or LINT[1:0]. Because the APIC
is enabled by default after Reset, operation of these pins as LINT[1:0] is the default
configuration.
3
LOCK#
I/O
LOCK# indicates to the system that a transaction must occur atomically. This signal
must connect the appropriate pins of all processor front side bus agents. For a
locked sequence of transactions, LOCK# is asserted from the beginning of the first
transaction to the end of the last transaction.
When the priority agent asserts BPRI# to arbitrate for ownership of the processor
front side bus, it will wait until it observes LOCK# deasserted. This enables
symmetric agents to retain ownership of the processor front side bus throughout the
bus locked operation and ensure the atomicity of lock.
4
Mechanical
Key
Inert
Mechanical Key to prevent compatibility with 603-pin socket.
MCERR#
I/O
MCERR# (Machine Check Error) is asserted to indicate an unrecoverable error
without a bus protocol violation. It may be driven by all processor front side bus
agents.
MCERR# assertion conditions are configurable at a system level. Assertion options
are defined by the following options:
·
Enabled or disabled.
·
Asserted, if configured, for internal errors along with IERR#.
·
Asserted, if configured, by the request initiator of a bus transaction after it
observes an error.
·
Asserted by any bus agent when it observes an error in a bus transaction.
For more details regarding machine check architecture, refer to the IA-32 Software
Developer's Manual, Volume 3: System Programming Guide.
Since multiple agents may drive this signal at the same time, MCERR# is a wire-OR
signal which must connect the appropriate pins of all processor front side bus
agents. In order to avoid wire-OR glitches associated with simultaneous edge
transitions driven by multiple drivers, MCERR# is activated on specific clock edges
and sampled on specific clock edges.
ODTEN
I
ODTEN (On-die termination enable) should be connected to V
CC
to enable on-die
termination for end bus agents. For middle bus agents, pull this signal down via a
resistor to ground to disable on-die termination. Whenever ODTEN is high, on-die
termination will be active, regardless of other states of the bus.
PROCHOT#
O
PROCHOT# (processor hot) indicates that the processor Thermal Control Circuit
(TCC) has been activated. Under most conditions, PROCHOT# will go active when
the processor's thermal sensor detects that the processor has reached its
maximum safe operating temperature. See
Section 6.3
for more details.
These signals do not have on-die termination and must be terminated at the
end agent. See the appropriate Platform Design Guideline for additional
information.
Table 41. Signal Definitions (Sheet 6 of 9)
Name
Type
Description
Notes
66
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
PWRGOOD
I
PWRGOOD (Power Good) is an input. The processor requires this signal to be a
clean indication that all processor clocks and power supplies are stable and within
their specifications. "Clean" implies that the signal will remain low (capable of
sinking leakage current), without glitches, from the time that the power supplies are
turned on until they come within specification. The signal must then transition
monotonically to a high state.
Figure 6
illustrates the relationship of PWRGOOD to
the RESET# signal. PWRGOOD can be driven inactive at any time, but clocks and
power must again be stable before a subsequent rising edge of PWRGOOD. It
must also meet the minimum pulse width specification in
Table 13
, and be followed
by a 1 mS RESET# pulse.
The PWRGOOD signal must be supplied to the processor; it is used to protect
internal circuits against voltage sequencing issues. It should be driven high
throughout boundary scan operation.
3
REQ[4:0]#
I/O
REQ[4:0]# (Request Command) must connect the appropriate pins of all processor
front side bus agents. They are asserted by the current bus owner to define the
currently active transaction type. These signals are source synchronous to
ADSTB[1:0]#. Refer to the AP[1:0]# signal description for details on parity checking
of these signals.
4
RESET#
I
Asserting the RESET# signal resets all processors to known states and invalidates
their internal caches without writing back any of their contents. For a power-on
Reset, RESET# must stay active for at least one millisecond after V
CC
and BCLK
have reached their proper specifications. On observing active RESET#, all front
side bus agents will deassert their outputs within two clocks. RESET# must not be
kept asserted for more than 10ms.
A number of bus signals are sampled at the active-to-inactive transition of RESET#
for power-on configuration. These configuration options are described in the
Section 6.1
.
This signal does not have on-die termination and must be terminated at the
end agent. See the appropriate Platform Design Guideline for additional
information.
4
RS[2:0]#
I
RS[2:0]# (Response Status) are driven by the response agent (the agent
responsible for completion of the current transaction), and must connect the
appropriate pins of all processor front side bus agents.
4
RSP#
I
RSP# (Response Parity) is driven by the response agent (the agent responsible for
completion of the current transaction) during assertion of RS[2:0]#, the signals for
which RSP# provides parity protection. It must connect to the appropriate pins of all
processor front side bus agents.
A correct parity signal is high if an even number of covered signals are low and low
if an odd number of covered signals are low. While RS[2:0]# = 000, RSP# is also
high, since this indicates it is not being driven by any agent guaranteeing correct
parity.
4
SKTOCC#
O
SKTOCC# (Socket occupied) will be pulled to ground by the processor to indicate
that the processor is present.
SLP#
I
SLP# (Sleep), when asserted in Stop-Grant state, causes processors to enter the
Sleep state. During Sleep state, the processor stops providing internal clock signals
to all units, leaving only the Phase-Locked Loop (PLL) still operating. Processors in
this state will not recognize snoops or interrupts. The processor will recognize only
assertion of the RESET# signal, deassertion of SLP#, and removal of the BCLK
input while in Sleep state. If SLP# is deasserted, the processor exits Sleep state
and returns to Stop-Grant state, restarting its internal clock signals to the bus and
processor core units.
3
SMB_PRT
I
Pin is grounded on processor packages that do not contain SMBUS components
(PIROM, Scratch EEPROM, and thermal sensor). It is floating on processor
packages that contain the SMBus components.
Table 41. Signal Definitions (Sheet 7 of 9)
Name
Type
Description
Notes
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
67
SMI#
I
SMI# (System Management Interrupt) is asserted asynchronously by system logic.
On accepting a System Management Interrupt, processors save the current state
and enter System Management Mode (SMM). An SMI Acknowledge transaction is
issued, and the processor begins program execution from the SMM handler.
If SMI# is asserted during the deassertion of RESET# the processor will tri-state its
outputs.
3
STPCLK#
I
STPCLK# (Stop Clock), when asserted, causes processors to enter a low power
Stop-Grant state. The processor issues a Stop-Grant Acknowledge transaction, and
stops providing internal clock signals to all processor core units except the front
side bus and APIC units. The processor continues to snoop bus transactions and
service interrupts while in Stop-Grant state. When STPCLK# is deasserted, the
processor restarts its internal clock to all units and resumes execution. The
assertion of STPCLK# has no effect on the bus clock; STPCLK# is an
asynchronous input.
3
TCK
I
TCK (Test Clock) provides the clock input for the processor Test Bus (also known
as the Test Access Port).
TDI
I
TDI (Test Data In) transfers serial test data into the processor. TDI provides the
serial input needed for JTAG specification support.
TDO
O
TDO (Test Data Out) transfers serial test data out of the processor. TDO provides
the serial output needed for JTAG specification support.
TESTHI[6:0]
I
All TESTHI[6:0] pins should be individually connected to VCC via a pull-up resistor
which matches the trace impedance within a range of ±10 ohms. TESTHI[3:0] and
TESTHI[6:5] may all be tied together and pulled up to VCC with a single resistor if
desired. However, utilization of boundary scan test will not be functional if these
pins are connected together. TESTHI4 must always be pulled up independently
from the other TESTHI pins. For optimum noise margin, all pull-up resistor values
used for TESTHI[6:0] pins should have a resistance value within ±20 percent of the
impedance of the baseboard transmission line traces. For example, if the trace
impedance is 50
, then a value between 40
and 60
should be used. The
TESTHI[6:0] termination recommendations provided in the Intel® Xeon
TM
processor datasheet are still suitable for the Intel® Xeon
TM
processor with 533 MHz
Front Side Bus. However, Intel recommends new designs or designs undergoing
design updates follow the trace impedance matching termination guidelines given
in this section.
THERMTRIP#
O
Activation of THERMTRIP# (Thermal Trip) indicates the processor junction
temperature has reached a level beyond which permanent silicon damage may
occur. Measurement of the temperature is accomplished through an internal
thermal sensor which is configured to trip at approximately 135 °C. To properly
protect the processor, power must be removed upon THERMTRIP# becoming
active. See Figure 6 for the appropriate power down sequence and timing
requirement. In parallel, the processor will attempt to reduce its temperature by
shutting off internal clocks and stopping all program execution. Once activated,
THERMTRIP# remains latched and the processor will be stopped until RESET# is
asserted. A RESET# pulse will reset the processor and execution will begin at the
boot vector. If the temperature has not dropped below the trip level, the processor
will assert THERMTRIP# and return to the shutdown state. The processor releases
THERMTRIP# when RESET# is activated even if the processor is still too hot.
This signal do not have on-die termination and must be terminated at the end
agent. See the appropriate platform design guidelines for additional
information
.
2
THERMDA
O
Thermal Diode Anode.
THERMDC
O
Thermal Diode Cathode.
Table 41. Signal Definitions (Sheet 8 of 9)
Name
Type
Description
Notes
68
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
NOTES:
1. Intel Xeon processors only support BR0# and BR1#. However, the Intel Xeon processors must terminate BR2# and BR3# to the
processor V
CC.
2. For this pin on Intel
®
XeonTM processors, the maximum number of symmetric agents is one. Maximum number of Central
Agents is zero.
3. For this pin on Intel
®
XeonTM processors, the maximum number of symmetric agents is two. Maximum number of Central
Agents is zero.
4.
For this pin on Intel
®
XeonTM processors, the maximum number of symmetric agents is two. Maximum number of Central
Agents is one.
TMS
I
TMS (Test Mode Select) is a JTAG specification support signal used by debug
tools.
This signal does not have on-die termination and must be terminated at the
end agent.See the appropriate platform design guidelines for additional
information.
TRDY#
I
TRDY# (Target Ready) is asserted by the target to indicate that it is ready to receive
a write or implicit writeback data transfer. TRDY# must connect the appropriate pins
of all front side bus agents.
TRST#
I
TRST# (Test Reset) resets the Test Access Port (TAP) logic. TRST# must be driven
low during power on Reset. See the appropriate Platform Design Guideline for
additional information.
V
CCA
I
VCCA provides isolated power for the analog portion of the internal PLL's. Use a
discrete RLC filter to provide clean power. Use the filter defined in
Section 2.5
to
provide clean power to the PLL. The tolerance and total ESR for the filter is
important. Refer to the appropriate platform design guidelines for complete
implementation details.
V
CCIOPLL
I
V
CCIOPLL
provides isolated power for digital portion of the internal PLL's. Follow the
guidelines for V
CCA
(
Section 2.5
), and refer to the appropriate platform design
guidelines for complete implementation details.
V
CCSENSE
V
SSSENSE
O
The Vccsense and Vsssense pins are the points for which processor minimum and
maximum voltage requirements are specified. Uniprocessor designs may utilize
these pins for voltage sensing for the processor's voltage regulator. However, multi-
processor designs must not connect these pins to sense logic, but rather utilize
them for power delivery validation
.
VID[4:0]
O
VID[4:0] (Voltage ID) pins can be used to support automatic selection of power
supply voltages (V
CC
). Unlike previous processor generations, these pins are
driven by processor logic. Hence the voltage supply for these pins (SM_V
CC
) must
be valid before the VRM supplying Vcc to the processor is enabled. Conversely, the
VRM output must be disabled prior to the voltage supply for these pins becomes
invalid. The VID pins are needed to support processor voltage specification
variations. See
Table 3
for definitions of these pins. The power supply must supply
the voltage that is requested by these pins, or disable itself.
VID_VCC .
I
Voltage for VID and BSEL logic
V
SSA
I
V
SSA
provides an isolated, internal ground for internal PLL's. Do not connect
directly to ground. This pin is to be connected to V
CCA
and V
CCIOPLL
through a
discrete filter circuit.
Table 41. Signal Definitions (Sheet 9 of 9)
Name
Type
Description
Notes
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
69
5.0
Thermal Specifications
This chapter provides the thermal specifications necessary for designing a thermal solution for the
Intel
®
XeonTM Processor with 533 MHz Front Side Bus. Thermal solutions should include
heatsinks that attach to the integrated heat spreader (IHS). The IHS provides a common interface
intended to be compatible with many heatsink designs. Thermal specifications are based on the
temperature of the IHS top, referred to as the case temperature, or T
CASE
. Thermal solutions should
be designed to maintain the processor within T
CASE
specifications. For information on performing
T
CASE
measurements, refer to the Intel® XeonTM Processor Thermal Design Guidelines. See
Figure
18
for an exploded view of the processor package and thermal solution assembly.
Note:
The processor is either shipped alone or with a heatsink (boxed processor only). All other
components shown in
Figure 18
must be purchased separately.
Note:
This is a graphical representation. For specifications, see each component's respective
documentation listed in
Section 1.3
.
Figure 18. Processor with Thermal and Mechanical Components - Exploded View
6 0 4 P in
70
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
5.1
Thermal Specifications
Table 42
specifies the thermal design power dissipation envelope for the Intel
®
XeonTM processor
with 533 MHz Front Side Bus. The processor power listed in
Table 42
is described in thermal
design power. Analysis indicates that real applications are unlikely to cause the processor to
consume the maximum possible power consumption. Intel recommends that system thermal
designs utilize the Thermal Design Power indicated in
Table 42
. Thermal Design Power
recommendations are chosen through characterization of server and workstation applications on
the processor.
The Thermal Monitor feature is intended to protect the processor from overheating on any high
power code that exceeds the recommendations in this table. For more details on the Thermal
Monitor feature, refer to
Section 6.3
. In all cases, the Thermal Monitor feature must be enabled for
the processor to be operating within specification.
Table 42
also lists the minimum and maximum
processor T
CASE
temperature specifications. A thermal solution should be designed to ensure the
temperature of the processor never exceeds these specifications.
NOTE:
1. Intel recommends that thermal solutions be designed utilizing the Thermal Design Power values. Refer to the
Intel® XeonTM Processor Thermal Design Guidelines.
2. TDP values are specified at the point on Vcc_max loadline corresponding to Icc_TDP.
3. Systems must be designed to ensure that the processor is not subjected to any static Vcc and Icc
combination wherein Vcc exceeds Vcc_max at specified Icc. Please refer to the loadline specifications in
Chapter 2.0.
Figure 19. Processor Thermal Design Power vs Electrical Projections for VID = 1.500V
Table 42. Processor Thermal Design Power
Core Frequency
Thermal Design
Power
1
(W)
Maximum Power
(W)
Minimum T
CASE
(°C)
Maximum T
CASE
(°C)
Notes
2 GHz
58
66
5
70
2,3
2.40 GHz
65
75
5
74
2,3
2.66 GHz
72
83
5
74
2,3
2.80 GHz
74
86
5
75
2,3
3.06 GHz
85
101
5
73
2,3
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
71
Figure 20. Processor Thermal Design Power vs Electrical Projections for VID = 1.525V
72
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
5.2
Measurements for Thermal Specifications
5.2.1
Processor Case Temperature Measurement
The minimum and maximum case temperatures (T
CASE
) for processors are specified in
Table 42
of
the previous section. These temperature specifications are meant to ensure correct and reliable
operation of the processor.
Figure 21
illustrates the thermal measurement point for T
CASE
. This
point is at the geometric center of the integrated heat spreader (IHS).
Figure 21. Thermal Measurement Point for Processor T
CASE
Note: Figure is not to scale, and is for reference only
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
73
6.0
Features
6.1
Power-On Configuration Options
The Intel
®
XeonTM Processor with 533 MHz Front Side Bus has several configuration options that
are determined by the state of specific processor pins at the active-to-inactive transition of the
processor RESET# signal. These configuration options cannot be changed except by another reset.
Both power on and software induced resets reconfigure the processor(s).
NOTES:
1. Asserting this signal during active-to-inactive edge of RESET# will selects the corresponding option.
2. The Intel® XeonTM processor with 533 MHz Front Side Bus does not support this feature, therefore platforms
utilizing this processor should not use these configuration pins.
3. Intel Xeon processor with 533 MHz Front Side Bus utilize only BR0# and BR1# signals. 2-way platforms must
not utilize BR2# and BR3# signals.
6.2
Clock Control and Low Power States
The processor allows the use of AutoHALT, Stop-Grant and Sleep states to reduce power
consumption by stopping the clock to internal sections of the processor, depending on each
particular state. See
Figure 22
for a visual representation of the processor low power states.
Due to the inability of processors to recognize bus transactions during the Sleep state,
multiprocessor systems are not allowed to simultaneously have one processor in Sleep state and the
other processor in the Normal or Stop-Grant state.
6.2.1
Normal State--State 1
This is the normal operating state for the processor.
Table 43. Power-On Configuration Option Pins
Configuration Option
Pin
1
Notes
Output tri state
SMI#
Execute BIST (Built-In Self Test)
INIT#
In Order Queue de-pipelining (set IOQ depth to 1)
A7#
Disable MCERR# observation
A9#
Disable BINIT# observation
A10#
APIC cluster ID (0-3)
A[12:11]#
2
Disable bus parking
A15#
Disable Hyper-Threading Technology
A31#
Symmetric agent arbitration ID
BR[3:0]#
3
74
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
6.2.2
AutoHALT Powerdown State--State 2
AutoHALT is a low power state entered when the processor executes the HALT instruction. The
processor will transition to the Normal state upon the occurrence of BINIT#, INIT#, LINT[1:0]
(NMI, INTR), or an interrupt delivered over the front side bus. RESET# will cause the processor to
immediately initialize itself.
The system can generate a STPCLK# while the processor is in the AutoHALT Power Down state.
When the system deasserts the STPCLK# interrupt, the processor will return execution to the
HALT state.
6.2.3
Stop-Grant State--State 3
When the STPCLK# pin is asserted, the Stop-Grant state of the processor is entered 20 bus clocks
after the response phase of the processor-issued Stop Grant Acknowledge special bus cycle. Once
the STPCLK# pin has been asserted, it may only be deasserted once the processor is in the Stop
Grant state. Both logical processors of the Intel
®
XeonTM processor with 533 MHz Front Side Bus
must be in the Stop Grant state before the deassertion of STPCLK#.
Figure 22. Stop Clock State Machine
2. Auto HALT Power Down
State
BCLK running
Snoops and interrupts allowed
1. Normal State
Normal execution
4. HALT/Grant Snoop State
BCLK running
Service snoops to caches
3. Stop Grant State
BCLK running
Snoops and interrupts allowed
5. Sleep State
BCLK running
No snoops or interrupts
allowed
HALT Instruction and
HALT Bus Cycle Generated
Snoop
Event
Occurs
Snoop
Event
Serviced
INIT#, BINIT#, INTR, NMI,
RESET#
STPCLK#
Asserted
STPCLK#
De-asserted
ST
PC
LK
# A
sse
rted
ST
PC
LK
# D
e-a
sse
rted
SLP#
Asserted
SLP#
De-asserted
Snoop Event Occurs
Snoop Event Serviced
.
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
75
Since the AGTL+ signal pins receive power from the front side bus, these pins should not be driven
(allowing the level to return to V
CC
) for minimum power drawn by the termination resistors in this
state. In addition, all other input pins on the front side bus should be driven to the inactive state.
BINIT# will be recognized while the processor is in Stop-Grant state. If STPCLK# is still asserted
at the completion of the BINIT# bus initialization, the processor will remain in Stop-Grant mode. If
the STPCLK# is not asserted at the completion of the BINIT# bus initialization, the processor will
return to Normal state.
RESET# will cause the processor to immediately initialize itself, but the processor will stay in
Stop-Grant state. A transition back to the Normal state will occur with the deassertion of the
STPCLK# signal. When re-entering the Stop-Grant state from the sleep state, STPCLK# should
only be deasserted one or more bus clocks after the deassertion of SLP#.
A transition to the HALT/Grant Snoop state will occur when the processor detects a snoop on the
front side bus (see
Section 6.2.4
). A transition to the Sleep state (see
Section 6.2.5
) will occur with
the assertion of the SLP# signal.
While in the Stop-Grant state, INIT#, BINIT# and LINT[1:0] will be latched by the processor, and
only serviced when the processor returns to the Normal state. Only one occurrence of each event
will be recognized upon return to the Normal state.
6.2.4
HALT/Grant Snoop State--State 4
The processor will respond to snoop transactions on the front side bus while in Stop-Grant state or
in AutoHALT Power Down state. During a snoop transaction, the processor enters the HALT/Grant
Snoop state. The processor will stay in this state until the snoop on the front side bus has been
serviced (whether by the processor or another agent on the front side bus). After the snoop is
serviced, the processor will return to the Stop-Grant state or AutoHALT Power Down state, as
appropriate.
6.2.5
Sleep State--State 5
The Sleep state is a very low power state in which each processor maintains its context, maintains
the phase-locked loop (PLL), and has stopped most of internal clocks. The Sleep state can only be
entered from Stop-Grant state. Once in the Stop-Grant state, the SLP# pin can be asserted, causing
the processor to enter the Sleep state. The SLP# pin is not recognized in the Normal or AutoHALT
states.
Snoop events that occur while in Sleep state or during a transition into or out of Sleep state will
cause unpredictable behavior.
In the Sleep state, the processor is incapable of responding to snoop transactions or latching
interrupt signals. No transitions or assertions of signals (with the exception of SLP# or RESET#)
are allowed on the front side bus while the processor is in Sleep state. Any transition on an input
signal before the processor has returned to Stop-Grant state will result in unpredictable behavior.
If RESET# is driven active while the processor is in the Sleep state, and held active as specified in
the RESET# pin specification, then the processor will reset itself, ignoring the transition through
Stop-Grant state. If RESET# is driven active while the processor is in the Sleep state, the SLP# and
STPCLK# signals should be deasserted immediately after RESET# is asserted to ensure the
processor correctly executes the reset sequence.
76
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
Once in the Sleep state, the SLP# pin can be deasserted if another asynchronous front side bus
event occurs. The SLP# pin should only be asserted when the processor
(and all logical processors
within the physical processor)
is in the Stop-Grant state. SLP# assertions while the processors are
not in the Stop-Grant state is out of specification and may result in illegal operation.
6.2.6
Bus Response During Low Power States
While in AutoHALT Power Down and Stop-Grant states, the processor will process a front side bus
snoop.
When the processor is in Sleep state, the processor will not process interrupts or snoop
transactions.
6.3
Thermal Monitor
Thermal Monitor is a feature of the processor that allows system designers to lower the cost of
thermal solutions, without compromising system integrity or reliability. By using a factory-tuned,
precision on-die temperature sensor, and a fast acting thermal control circuit (TCC), the processor,
without the aid of any additional software or hardware, can control the processors' die temperature
within factory specifications under typical real-world operating conditions. Thermal Monitor thus
allows the processor and system thermal solutions to be designed much closer to the power
envelopes of real applications, instead of being designed to the much higher maximum processor
power envelopes.
Thermal Monitor controls the processor temperature by modulating (starting and stopping) the
internal processor core clocks. The processor clocks are modulated when the thermal control
circuit (TCC) is activated. Thermal Monitor uses two modes to activate the TCC: Automatic mode
and On-Demand mode. Automatic mode must be enabled via BIOS, which is required for the
processor to operate within specifications. Once automatic mode is enabled, the TCC will
activate only when the internal die temperature is very near the temperature limits of the processor.
When the TCC is enabled, and a high temperature situation exists (i.e. TCC is active), the clocks
will be modulated by maintaining a duty cycle within a range of 30% - 50%. Clocks will not be off
or on more than 3.0 ms when the TCC is active. Cycle times are processor speed dependent and
will decrease as processor core frequencies increase. A small amount of hysteresis has been
included to prevent rapid active/inactive transitions of the TCC when the processor temperature is
near the trip point. Once the temperature has returned to a non-critical level, and the hysteresis
timer has expired, modulation ceases and the TCC goes inactive. Processor performance will be
decreased by ~50% when the TCC is active (assuming a duty cycle that varies from 30%-50%),
however, with a properly designed and characterized thermal solution the TCC most likely will
only be activated briefly during the most power intensive applications while at maximum chassis
ambient temperature.
For automatic mode, the duty cycle is factory configured and cannot be modified. Also, automatic
mode does not require any additional hardware, software drivers or interrupt handling routines.
The TCC may also be activated via On-Demand mode. If bit 4 of the ACPI Thermal Monitor
Control Register is written to a "1" the TCC will be activated immediately, independent of the
processor temperature. When using On-Demand mode to activate the TCC, the duty cycle of the
clock modulation is programmable via bits 3:1 of the same ACPI Thermal Monitor Control
Register. In automatic mode, the duty cycle is fixed anywhere within a range of 30% to 50%;
however in On-Demand mode, the duty cycle can be programmed from 12.5% on/ 87.5% off, to
87.5% on/12.5% off in 12.5% increments. On-Demand mode may be used at the same time
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
77
Automatic mode is enabled, however, if TCC is enabled via On-Demand mode at the same time
automatic mode is enabled AND a high temperature condition exists, the fixed duty cycle of the
automatic mode will override the duty cycle selected by the On-Demand mode.
An external signal, PROCHOT# (processor hot) is asserted at any time the TCC is active (either in
Automatic or On-Demand mode). Bus snooping and interrupt latching are also active while the
TCC is active. The temperature at which the thermal control circuit activates is not user
configurable and is not software visible. In an MP system, Thermal Monitor must be configured
identically for each processor within the system.
Besides the thermal sensor and thermal control circuit, the Thermal Monitor feature also includes
one ACPI register, one performance counter register, three model specific registers (MSR), and one
I/O pin (PROCHOT#). All are available to monitor and control the state of the Thermal Monitor
feature. Thermal Monitor can be configured to generate an interrupt upon the assertion or de-
assertion of PROCHOT# (i.e. upon the activation/deactivation of TCC). Refer to Volume 3 of the
IA32 Intel Architecture Software Developer's for specific register and programming details.
If automatic mode is disabled the processor will be operating out of specification and cannot be
guaranteed to provide reliable results. Regardless of enabling of the automatic or On-Demand
modes, in the event of a catastrophic cooling failure, the processor will automatically shut down
when the silicon has reached a temperature of approximately 135 °C. At this point the front side
bus signal THERMTRIP# will go active and stay active until the processor has cooled down and
RESET# has been initiated. THERMTRIP# activation is independent of processor activity and
does not generate any bus cycles.If THERMTRIP# is asserted, processor core voltage (V
CC
) must
be removed within the timeframe defined in
Figure 6
.
6.3.1
Thermal Diode
The processor incorporates an on-die thermal diode. A thermal sensor located on the baseboard
may be used to monitor the die temperature of the processor for thermal management/long term die
temperature change purposes.
Table 44
and
Table 45
provide the diode parameter and interface
specifications.This thermal diode is separate from the Thermal Monitor's thermal sensor and
cannot be used to predict the behavior of the Thermal Monitor.
Table 44. Thermal Diode Parameters
NOTES:
1. Intel does not support or recommend operation of the thermal diode under reverse bias.
2. Characterized at 75
°
C.
3. Not 100% tested. Specified by design characterization.
4. The ideality factor, n, represents the deviation from ideal diode behavior as exemplified by the diode
equation:
I
FW
=I
s
*(e
(qV
D
/nkT)
-1)
Where I
S
= saturation current, q = electronic charge, V
D
= voltage across the diode, k = Boltzmann Constant,
and T = absolute temperature (Kelvin).
5.
The series resistance, R
T
, is provided to allow for a more accurate measurement of the diode junction
temperature. R
T
as defined includes the pins of the processor but does not include any socket resistance or
Symbol
Parameter
Min
Typ
Max
Unit
Notes
I
FW
Forward Bias
Current
5
300
uA
1
n
Diode Ideality
Factor
1.0011
1.0021
1.0030
2,3,4
R
T
Series
Resistance
3.64
W
2,3,5
78
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
board trace resistance between the socket and the external remote diode thermal sensor. R
T
can be used by
remote diode thermal sensors with automatic series resistance cancellation to calibrate out this error term.
Another application is that a temperature offset can be manually calculated and programmed into an offset
register in the remote diode thermal sensors as exemplified by the equation: T
error
= [R
T
*(N-1)*I
FWmin
]/[(nk/
q)*ln N]
Where T
error
= sensor temperature error, N = sensor current ration, k = Boltzmann Constant, q = electronic
charge.
Table 45. Thermal Diode Interface
Pin Name
Pin Number
Pin Description
THERMDA
Y27
diode anode
THERMDC
Y28
diode cathode
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
79
7.0
Boxed Processor Specifications
7.1
Introduction
The Intel® XeonTM Processor with 533 MHz Front Side Bus is also offered as an Intel boxed
processor. Intel boxed processors are intended for system integrators who build systems from
components available through distribution channels. The boxed processor is supplied with an
unattached passive heatsink. It will also contain an optional active duct solution, called Processor
Wind Tunnel (PWT), to provide adequate airflow across the heatsink. If the chassis or baseboard
used contains an alternate cooling solution that has been thermally validated, the PWT may be
discarded. This chapter documents baseboard and platform requirements for the cooling solution
that is supplied with the boxed processor. This chapter is particularly important for OEM's that
manufacture baseboards and chassis for integrators.
Figure 23
shows a mechanical representation
of a boxed processor heatsink.
Note:
Drawings in this section reflect only the specifications on the Intel boxed processor product. These
dimensions should not be used as a generic keep-out zone for all cooling solutions. It is the system
designer's responsibility to consider their proprietary cooling solution when designing to the
required keep-out zone on their system platform and chassis.
Figure 23. Mechanical Representation of the Boxed Processor Passive Heatsink
80
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
7.2
Mechanical Specifications
This section documents the mechanical specifications of the boxed processor passive heatsink and
the PWT.
Proper clearance is required around the heatsink to ensure proper installation of the processor and
unimpeded airflow for proper cooling.
7.2.1
Boxed Processor Heatsink Dimensions
The boxed processor is shipped with an unattached passive heatsink. Clearance is required around
the heatsink to ensure unimpeded airflow for proper cooling. The physical space requirements and
dimensions for the boxed processor with assembled heatsink are shown in
Figure 26
(Multiple
Views). The airflow requirements for the boxed processor heatsink must also be taken into
consideration when designing new baseboards and chassis. The airflow requirements are detailed
in the Thermal Specifications,
Section 7.4
.
7.2.2
Boxed Processor Heatsink Weight
The boxed processor heatsink weighs no more than 450 grams. See
Chapter 3.0
and
Chapter 5.0
of
this document along with the Intel
®
Xeon
TM
Processor Family Thermal Design Guidelines for
details on the processor weight and heatsink requirements.
7.2.3
Boxed Processor Retention Mechanism and Heatsink Supports
The boxed processor requires processor retention solution to secure the processor, the baseboard,
and the chassis. The retention solution contains one retention mechanisms and two retention clips
per processor. The boxed processor ships with retention mechanism, cooling solution retention
clips, and direct chassis attach screws.Baseboards and chassis designed for use by system integra-
tors should include holes that are in proper alignment with each other to support the boxed proces-
sor. Refer to the Server System Infrastructure Specification (SSI-EEB) at http://www.ssiforum.org
for details on the hole locations. Please refer to the "Boxed integration notes" at http://sup-
port.intel.com/support/processors/xeon for retention mechanism installation instructions. Retention
mechanism clips must interface with the boxed processor heatsink area shown in Detail A in
Figure
26
.
The retention mechanism that ships with the boxed processor is different than the reference solu-
tion from Intel. Please refer to
Figure 24
below, which contains the dimensions for the reference
solution. Please refer to
Figure 25
for the retention mechanism that ships with the boxed processor.
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
81
Figure 24. Boxed Processor Retention Mechanism and Clip
82
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
Figure 25. Boxed Processor Retention Mechanism that Ships with the Processor
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
83
Figure 26. Multiple View Space Requirements for the Boxed Processor
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Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
7.3
Boxed Processor Requirements
7.3.1
Intel® XeonTM Processor with 533 MHz Front Side Bus
7.3.1.1
Processor Wind Tunnel
The boxed processor ships with an active duct cooling solution called the Processor Wind Tunnel,
or PWT. This is an optional cooling solution that is designed to meet the thermal requirements of a
diverse combination of baseboards and chassis. It ships with the processor in order to reduce the
burden on the chassis manufacturer to provide adequate airflow across the processor heatsink.
Manufacturers may elect to use their own cooling solution.
Note:
Although Intel will be testing a select number of baseboard and chassis combinations for thermal
compliance, this is in no way a comprehensive test. It is ultimately the system integrator's
responsibility to test that their solution meets all of the requirements specified in this document.
The PWT is meant to assist in processor cooling, but additional cooling techniques may be required
in order to ensure that the entire system meets the thermal requirements.
See
Figure 28
and
Figure 29
for the Processor Wind Tunnel dimensions.
7.3.1.2
Fan Power Supply
The Processor Wind Tunnel includes a fan, which requires a constant +12V power supply. A fan
power cable is shipped with the boxed processor to draw power from a power header on the
baseboard. The power cable connector and pinouts are shown in
Figure 27
and the fan cable
connector requirements are detailed in
Table 46
. Platforms must provide a matched power header
to support the boxed processor.
Table 47
contains specifications for the input and output signals at
the fan heatsink connector. The fan heatsink outputs a SENSE signal, an open-collector output, that
pulses at a rate of two pulses per fan revolution. A baseboard pull-up resistor provides V
OH
to
match the baseboard-mounted fan speed monitor requirements, if applicable. Use of the SENSE
signal is optional. If the SENSE signal is not used, pin 3 of the connector should be tied to GND.
The power header on the baseboard must be positioned to allow the fan heatsink power cable to
reach it. The power header identification and location should be documented in the platform
documentation, or on the baseboard itself. The baseboard power header should be positioned
within 7 inches from the centre of the processor socket.
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
85
1. Baseboard should pull this pin up to V
CC
with a resistor.
Figure 27. Fan Connector Electrical Pin Sequence
Table 46. Fan Cable Connector Requirements
Table 47. Fan Power and Signal Specifications
Description
Min
Typ
Max
Unit
Notes
+12V: 12 Vot Fan Power Supply
6.0
12.0
13.2
V
IC: Fan Current Draw
1.5
A
SENSE Frequency
2
Pulses per fan
revolution
1
Item
Specification
Connector Type
-
Fan connector must be a straight square pin, 3-pin terminal
housing with polarizing ribs and friction locking ramp.
-
Match with a straight pin, friction lock header on the
mainboard.
-
Manufacturer and part number or equivalent:
o
AMP
: Fan connector: 643815-3, header: 640456-3
o
Walden
/ Molex
: Fan connector: 22-01-3037,
header: 22-23-2031
Pin Out
(See Figure
Above)
-
Pin 1: Ground; black wire.
-
Pin 2: Power, +12 V; yellow wire.
-
Pin 3: Signal, Open collector tachometer output signal
requirement: 2 pulses per revolution; green wire.
Fan cable length
(Drawing
747887):
The fan cable connector must reach a mating mainboard
connector at any point within a radius of 110 mm (4.33")
measured from the central datum planes of the enabled
assembly (datum planes A, B & C on Drawing AXXXXX).
Fan cable
routing
Fan power cable must be routed in such a way to prevent it from
contacting the fan impellor and it must be positioned in a
consistent location from unit to unit.
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Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
Figure 28. Processor Wind Tunnel General Dimensions
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
87
Figure 29. Processor Wind Tunnel Detailed Dimensions
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Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
7.3.1.3
Fan
The Processor Wind Tunnel includes a 25mm fan for use with processors <= 2.8 GHz, or a 38mm
fan for use with processors running at 3 GHz and above. The 38mm fan provides the high
performance required to meet the demanding thermal requirements of processors running at 3 GHz
and above. The 38mm fan provides local fan speed control. There is a temperature diode on the fan
that measures the inlet temperature to the fan and adjusts the speed accordingly. The benefit is that
system manufacturers can pass acoustical requirements while still being able to pass thermal
requirements at maximum ambient temperature.
7.3.2
1U Rack Mount Server Solution
The 1U solution contains a passive heatsink and a foam pad, in addition to the retention solution
included with the other options. Because of the small form factor, the 1U heatsink is not as efficient
at dissipating heat as the general-purpose heatsink. In order to ensure maximum thermal efficiency,
the foam pad must be attached to the top of the 1U heatsink, blocking airflow between the heatsink
and the chassis cover. This will force air through the heatsink fins instead of allowing it to bypass
over the top. See
Figure 30
and
Figure 31
for more detail on installation.
Figure 30. Exploded View of the 1U Thermal Solution
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
89
Figure 31. Assembled View of the 1U Thermal Solution
90
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
7.4
Thermal Specifications
This section describes the cooling requirements of the heatsink solution utilized by the boxed
processor.
7.4.1
Boxed Processor Cooling Requirements
The boxed processor will be directly cooled with a passive heatsink. For the passive heatsink to
effectively cool the boxed processor, it is critical that sufficient, unimpeded, cool air flow over the
heatsink of every processor in the system. Meeting the processor's temperature specification is a
function of the thermal design of the entire system, and ultimately the responsibility of the system
integrator. The processor temperature specification is found in
Chapter 5.0
. It is important that
system integrators perform thermal tests to verify that the boxed processor is kept below its
maximum temperature specification in a specific baseboard and chassis.
At an absolute minimum, the boxed processor heatsink will require 500 Linear Feet per Minute
(LFM) of cool air flowing over the heatsink. The airflow must be directed from the outside of the
chassis directly over the processor heatsinks in a direction passing from one retention mechanism
to the other. It also should flow from the front to the back of the chassis. Directing air over the
passive heatsink of the boxed Intel® XeonTM Processor with 533 MHz Front Side Bus can be done
with auxiliary chassis fans, fan ducts, or other techniques.
It is also recommended that the ambient air temperature outside of the chassis be kept at or below
35 °C. The air passing directly over the processor heatsink should not be preheated by other system
components (such as another processor), and should be kept at or below 45 °C. Again, meeting the
processor's temperature specification is the responsibility of the system integrator. The processor
temperature specification is found in
Chapter 5.0
.
Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
91
8.0
Debug Tools Specifications
The Debug Port design information has been moved. This includes all information necessary to
develop a Debug Port on this platform, including electrical specifications, mechanical
requirements, and all In-Target Probe (ITP) signal layout guidelines. Please reference the ITP700
Debug Port Design Guide for the design of your platform.
8.1
Logic Analyzer Interface (LAI)
Intel® is working with two logic analyzer vendors to provide logic analyzer interfaces (LAIs) for
use in debugging systems. Tektronix* and Agilent* should be contacted to get specific information
about their logic analyzer interfaces. The following information is general in nature. Specific
information must be obtained from the logic analyzer vendor.
Due to the complexity of systems, the LAI is critical in providing the ability to probe and capture
front side bus signals. There are two sets of considerations to keep in mind when designing a
system that can make use of an LAI: mechanical and electrical.
8.1.1
Mechanical Considerations
The LAI is installed between the processor socket and the processor. The LAI pins plug into the
socket, while the processor pins plug into a socket on the LAI. Cabling that is part of the LAI
egresses the system to allow an electrical connection between the processor and a logic analyzer.
The maximum volume occupied by the LAI, known as the keepout volume, as well as the cable
egress restrictions, should be obtained from the logic analyzer vendor. System designers must
make sure that the keepout volume remains unobstructed inside the system. Note that it is possible
that the keepout volume reserved for the LAI may differ from the space normally occupied by the
processor heatsink. If this is the case, the logic analyzer vendor will provide a cooling solution as
part of the LAI.
8.1.2
Electrical Considerations
The LAI will also affect the electrical performance of the front side bus; therefore, it is critical to
obtain electrical load models from each of the logic analyzers to be able to run system level
simulations to prove that their tool will work in the system. Contact the logic analyzer vendor for
electrical specifications and load models for the LAI solution they provide.
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Intel® XeonTM Processor with 533 MHz Front Side Bus at 2 GHz to 3.06 GHz
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