Copyright
Š
Cirrus Logic, Inc. 1998
(All Rights Reserved)
CS4610/11
Advanced Product Databook
CrystalClearTM
SoundFusionTM PCI Audio
Accelerator
FEATURES
s
High Performance PCI Audio Accelerator
-- Powerful RAM-based SLIMDTM DSP core provides high
task concurrency and maximum flexibility
-- Efficient bus mastering PCI interface minimizes host
loading
-- DMA engine with hardware scatter-gather manages up
to 96 simultaneous audio/data streams
s
Flexible Digital Audio Interface Design
-- Direct Connection to CS423x Codec
-- Simple expansion to 6 audio output channels
-- Direct Connection to CS4297 AC'97 Codec
s
Complete Solution including DSP Software and
Windows 95
Ž
drivers
-- Acceleration of DirectSound
Ž
, DirectSound3D
Ž
, Direct-
InputTM, and DirectShowTM APIs
-- High Quality HRTF-Based 3D Positional Sound
-- General MIDI Wavetable Synthesis with Reverb and
Chorus
-- Dolby
Ž
AC-3
Ž
(5.1 channel) and MPEG-2 Audio Decod-
ing (CS4610 only) with speaker virtualization
DESCRIPTION
The CS4610/11 is a high performance audio accel-
erator for the PCI bus. This device, combined with
application and driver software, provides a com-
plete system solution for hardware acceleration of
Windows 95 DirectSound, DirectSound3D, Direct-
Input, DirectShow, and Wavetable Synthesis.
The CS4610/11 is based on the Cirrus Logic, Crys-
talClear Stream Processor (SP) DSP core. The SP
core is optimized for digital audio processing, and
is powerful enough to handle complex signal pro-
cessing tasks such as Dolby AC-3 decoding
(CS4610 only) with ease. The SP core is supported
by a bus mastering PCI interface and a built-in ded-
icated DMA engine with hardware scatter-gather
support. These support functions ensure extremely
efficient transfer of audio data streams to and from
host-based memory buffers, providing a system
solution with maximum performance and minimal
host CPU loading.
The all-digital CS4610/11 supports a variety of au-
dio I/O configurations, including direct connection
to the CrystalClear CS423x Codecs via a bi-direc-
tional serial data link, or direct connection to an
AC'97 Codec such as the CrystalClear CS4297.
ORDERING INFORMATION
CS4610-CM
100-pin MQFP
20x14x3.07 mm
CS4610C-CQ
128-pin TQFP
20x14x1.60 mm
CS4611-CM
100-pin MQFP
20x14x3.07 mm
96-Stream
DMA Controller
with Hardware
Scatter/Gather
MPU-401
MIDI Interface
AC '97
Interface
GPIO
Interrupt
Controller
2
423x Interface
and Dual I S
Output
Sample
RAM
Program
RAM
Coefficient
ROM
Parameter
RAM
PLL Clock
Generator
PCI
Interface
Joystick
Interface
SLIMD
SP Core
DS241PP5
MAR `98
2
DS241PP5
CS4610/11
CrystalClearTM SoundFusionTM PCI Audio Accelerator
ABSOLUTE MAXIMUM RATINGS
(PCIGND = CGND = CRYGND = 0 V, all voltages with respect to 0 V)
Notes: 1. Includes all power generated by AC and/or DC output loading.
2. The power supply pins are at recommended maximum values. XTALI & XTALO are at 3.6 V maximum.
3. At ambient temperatures above 70° C, total power dissipation must be limited to less than 0.4 Watts.
WARNING: Operation beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
RECOMMENDED OPERATING CONDITIONS
(PCIGND = CGND = CRYGND = 0 V, all voltages with respect to 0 V)
Specifications are subject to change without notice.
Parameter
Symbol
Min
Typ
Max
Unit
Power Supplies
PCIVDD
CVDD
CRYVDD
VDD5REF
-
-
-
-
-
-
-
-
4.6
4.6
4.6
5.5
V
V
V
V
Total Power Dissipation
(Note 1)
-
-
1.5
W
Input Current per Pin, DC (Except supply pins)
-
-
10
mA
Output current per pin, DC
-
-
10
mA
Input voltage
(Note 2)
-0.3
-
5.75
V
Ambient temperature (power applied)
(Note 3)
-45
-
85
°C
Storage temperature
-55
-
150
°C
Parameter
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
CS4610
CS4611
Power Supplies
PCIVDD
CVDD
CRYVDD
VDD5REF
3
3
3
4.75
3.3
3.3
3.3
5
3.6
3.6
3.6
5.25
3
3
3
4.75
3.3
3.3
3.3
5
3.6
3.6
3.6
5.25
V
V
V
V
Internal DSP Frequency
-
-
100
-
-
85
MHz
Operating Ambient Temperature
T
A
0
25
70
0
25
70
°C
Dolby's AC3 Technology is implemented on the CS4610 Stream Processor Only. Supply of this Implementation of Dolby
Technology does not convey a license nor imply a right under any patent, or any other Industrial or Intellectual Property
Right of Dolby Laboratories, to use this Implementation in any finished end-user or ready-to-use final product. It is hereby
notified that a license for such use is required from Dolby Laboratories.
Dolby and AC-3 are registered trademarks of Dolby Laboratories Licensing Corporation.
Windows, Windows 95, DirectSound, and DirectSound3D are registered trademarks of Microsoft Corporation.
DirectInput, DirectX and DirectShow are trademarks of Microsoft Corporation.
Sound Blaster and Sound Blaster Pro are trademarks of Creative Technology, Ltd.
Crystal, CrystalClear, SLIMD and SoundFusion are trademarks of Cirrus Logic, Inc.
All other names are trademarks, registered trademarks, or service marks of their respective companies.
DS241PP5
3
CS4610/11
CrystalClearTM SoundFusionTM PCI Audio Accelerator
AC CHARACTERISTICS (PCI SIGNAL PINS ONLY)
(T
A
= 70° C;
PCIVDD = CVDD = CRYVDD = 3.3 V; VDD5REF = 5 V; PCIGND = CGND = CRYGND = 0 V;
Logic 0 = 0 V, Logic 1 = 3.3 V; Reference levels = 1.4 V; unless otherwise noted; (Note 4))
Notes: 4. Specifications guaranteed by characterization and not production testing.
5. Refer to V/I curves in Figure 1. Specification does not apply to CLK and RST# signals. Switching Current
High specification does not apply to SERR# and INTA# which are open drain outputs.
6. Cumulative edge rate across specified range. Rise slew rates do not apply to open drain outputs.
7. Equation A: I
OH
= 11.9 * (Vout - 5.25) * (Vout + 2.45) for 3.3 V > Vout > 3.1 V
8. Equation B: I
OL
= 78.5 * Vout * (4.4 - Vout) for 0 V < Vout < 0.71 V
Parameter
Symbol
Min
Max
Unit
Switching Current High
(Note 5)
0 < Vout < 1.4
1.4 < Vout < 2.4
3.1 < Vout < 3.3
I
OH
-44
-
-
-
Note 7
mA
mA
Switching Current Low
(Note 5)
Vout > 2.2
2.2 > Vout > 0.55
0.71 > Vout > 0
I
OL
95
Vout/0.023
-
-
-
Note 8
mA
mA
Low Clamp Current
-5 < Vin < -1
I
CL
-
mA
Output rise slew rate
0.4 V - 2.4 V load
(Note 6)
slewr
1
5
V/ns
Output fall slew rate
2.4 V - 0.4 V load
(Note 6)
slewf
1
5
V/ns
44
Vout
1.4
0.024
---------------------------
+
25
Vin
1
+
0.015
-------------------
+
Pull Up
Pull Down
Equation B:
Equation A:
3.3
3.3
2.2
0.55
2.4
voltage
voltage
1.4
DC
drive point
DC drive
point
AC drive
point
I
= 11.9*(Vout-5.25)*(Vout+2.45)
for 3.3V > Vout > 3.1V
OH
I
= 78.5*Vout*(4.4-Vout)
for 0V < Vout < 0.71V
OL
AC drive
point
test
point
test
point
-2
3, 6
95
380
-44
Current (mA)
Current (mA)
-176
Figure 1. AC Characteristics
4
DS241PP5
CS4610/11
CrystalClearTM SoundFusionTM PCI Audio Accelerator
DC CHARACTERISTICS
(T
A
= 70° C; PCIVDD = CVDD = CRYVDD = 3.3 V; VDD5REF = 5 V;
PCIGND = CGND = CRYGND = 0 V; all voltages with respect to 0 V unless otherwise noted)
Notes: 9. The following signals are tested to 6 mA: FRAME#, TRDY#, IRDY#, DEVSEL#, STOP#, SERR#,
PERR#, and INTA#. All other PCI interface signals are tested to 3 mA.
10. Input leakage currents include hi-Z output leakage for all bi-directional buffers with three-state outputs.
At supply voltages of 3.6 V or higher and ambient temperatures of 70° C, the high level leakage current
may exceed 70 ľA. For normal operating ranges of 25° C and a supply voltage of 3.3 V, the high level
leakage current is within specification.
11. For open drain pins, high level output voltage is dependent on external pull-up used and number of
attached gates.
12. Typical values are given as average current with typical SP task execution and data streaming. Current
values vary dramatically based on the software running on the SP.
Parameter
Symbol
Min
Typ
Max
Unit
PCI Interface Signal Pins
High level input voltage
V
IH
2
-
5.75
V
Low level input voltage
V
IL
-0.5
-
0.8
V
High level output voltage
Iout = -2 mA
V
OH
2.4
-
-
V
Low level output voltage
Iout = 3 mA, 6 mA
(Note 9)
V
OL
-
-
0.55
V
High level leakage current
Vin = 2.7 V
(Note 10)
I
IH
-
-
70
ľA
Low level leakage current
Vin = 0.5 V
(Note 10)
I
IL
-
-
-70
ľA
Non-PCI Interface Signal Pins (Except XTALO)
High level input voltage
XTALI
Other Pins
V
IH
2.3
2
3.3
-
4.0
5.75
V
V
Low level input voltage
XTALI
Other Pins
V
IL
-0.5
-0.5
0
-
0.8
0.8
V
V
High level output voltage
Iout = -4 mA
(Note 11)
V
OH
2.4
-
-
V
Low level output voltage
Iout = 4 mA
V
OL
-
-
0.4
V
High level leakage current
Vin = 5.25 V
I
IH
-
-
10
ľA
Low level leakage current
Vin = 0
I
IL
-
-
-10
ľA
Parameter
Min
Typ
Max
Min
Typ
Max
Unit
CS4610
CS4611
Power Supply Pins (Outputs Unloaded)
Power Supply Current: VDD5REF
PCIVDD/CVDD/CRYVDD Total (Notes 4,12)
-
-
0.6
200
-
370
-
-
0.6
164
-
240
mA
mA
Low Power Mode Supply Current
-
10
-
-
10
-
mA
DS241PP5
5
CS4610/11
CrystalClearTM SoundFusionTM PCI Audio Accelerator
PCI INTERFACE PINS
(T
A
= 0 to 70° C; PCIVDD = CVDD = CRYVDD = 3.3 V; VDD5REF = 5 V;
PCIGND = CGND = CRYGND = 0 V; Logic 0 = 0 V, Logic 1 = 3.3 V; Timing reference levels = 1.4 V)
Notes: 13. For Active/Float measurements, the Hi-Z or "off" state is when the total current delivered is less than or
equal to the leakage current. Specification is guaranteed by design, not production tested.
14. RST# is asserted and de-asserted asynchronously with respect to PCICLK.
15. All output drivers are asynchronously floated when RST# is active.
Parameter
Symbol
Min
Max
Unit
PCICLK cycle time
t
cyc
30
-
ns
PCICLK high time
t
high
11
-
ns
PCICLK low time
t
low
11
-
ns
PCICLK to signal valid delay - bused signals
t
val
2
11
ns
PCICLK to signal valid delay - point to point
t
val(p+p)
2
12
ns
Float to active delay
(Note 13)
t
on
2
-
ns
Active to Float delay
(Note 13)
t
off
-
28
ns
Input Set up Time to PCICLK - bused signals
t
su
7
-
ns
Input Set up Time to PCICLK - point to point
t
su(p+p)
10, 12
-
ns
Input hold time for PCICLK
t
h
0
-
ns
Reset active time after PCICLK stable
(Note 14)
t
rst-clk
100
-
ľ
s
Reset active to output float delay
(Notes 13, 14, 15)
t
rst-off
-
40
ns
PCICLK
t
rst-clk
RST#
OUTPUTS
Hi-Z
INPUTS
Valid
Input
t
on
t
off
t
su
t
h
OUTPUTS
Valid
t
val
t
rst-off
Figure 2. PCI Timing Measurement Conditions
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