* This specification are subject to be changed without notice.

EM73P982

4-BIT MICROCONTROLLER

12.25.2001

GENERAL DESCRIPTION

EM73P982 is an advanced single chip CMOS 4-bit one-time programming (OTP) micro-controller. It contains
16K-byte ROM, 372-nibble RAM, 4-bit ALU, 13-level subroutine nesting, 22-stage time base, two 12-bit timer/
counters for the kernal function. EM73P982 also contains 5 interrupt sources, 3 I/O ports (including 1 input port
and 2 bidirection ports), LCD display (40x8), built-in sound generator and speech synthesizer.
Except low-power consumption and high speed, EM73P982 also have a sleep mode for power saving function.
EM73P982 is suitable for appliaction in many fields, for example : family appliance, consumer products, hand
held games and the toy controller ... etc.

FEATURES

· Operation voltage

: 2.4V to 5.5V.

· Clock source

: Single clock system for both RC and Crystal are available by mask option.

External clock and internal clock are available by mask option.

· Oscillation frequency : 480K, 1M, 2M and 4M Hz are available by mask option.
· Instruction set

: 109 powerful instructions.

· Instruction cycle time : Up to 2us for 4 MHz.
· ROM capacity

: 16384 X 8 bits.

· RAM capacity

: 372 X 4 bits.

· Input port

: 1 port (P0.0-P0.3) and sleep/hold releasing function are available by mask option.

(each input pin is pull-up and pull-down resistor available by mask option).

· Bidirection port

: 2 ports (P4, P8). P4.0 and SOUND is available by mask option. P8(0..3) and sleep/

hold releasing function are available by mask option.

· 12-bit timer/counter

: Two 12-bit timer/counters are programmable for timer, event counter and pulse width

measurement.

· Built-in time base counter : 22 stages.
· Subroutine nesting

: Up to 13 levels.

· Interrupt

: External . . . . . 1 input interrupt sources.

Internal . . . . . . 2 Timer overflow interrupts.

1 Time base interrupt.
1 Speech ending interrupt.

· LCD driver

: 40 X 8 dots, 1/8 duty, LCD bias is 1/4 and modified 1/4 available by mask option, LCD

bias resistor is 20K X 5 and 10K X 5 available by mask option.

· Sound effect

: Tone generator, random generator and volume control.

· Speech synthesizer

: Speech data ROM . . 24K bytes.

Sample rate . . . . . . . 4K, 5K, 8K, 10K, 12K, 15K, 20K programmable.

· Power saving function : Sleep mode and Hold mode.
· Package type :

EM73P982H

Chip form

69 pins.

* This specification are subject to be changed without notice.

EM73P982

4-BIT MICROCONTROLLER

12.25.2001

FUNCTION BLOCK DIAGRAM

PIN DESCRIPTIONS

Symbol

Pin-type

Function

D D

Power supply (+)

Power supply (-)

RESET

RESET-A

System reset input signal, low active
mask option :

none
pull-up

XIN/CLK

OSC-A/OSC-C Crystal/RC or external clock source connecting pin

XOUT/NC

OSC-A/OSC-C Crystal connecting pin

P0.(0..3)/WAKEUP0..3

INPUT-B

4-bit input port with Sleep/Hold releasing function
P0.0/ACLK : address counter clock for programming OTP
P0.1/PGMB : program data to OTP cells for programming OTP
P0.2/OEB : data output enable for programming OTP
P0.3/DCLK : data in/out clock signal for programming OTP
mask option :

wakeup enable, pull-up
wakeup enable, none
wakeup disable, pull-up
wakeup disable, pull-down
wakeup disable, none

Interrupt

Control

Time

Base

Timer/Counter

(TA,TB)

System Control

Instruction Decoder

Instruction Register

ROM

Data Bus

Reset

Control

Clock

Generator

Timing

Generator

Sleep Mode

Control

Data pointer

ACC

ALU

Flag

Stack pointer

Stack

ROM

I/O Control

P0.0/WAKEUP0
P0.1/WAKEUP1
P0.2/WAKEUP2
P0.3/WAKEUP3

P4.0/SOUND

P4.1

P4.2

P4.3

P8.0/WAKEUPA

P8.1(TRGB)/WAKEUPB

P8.2(INT0)/WAKEUPC

P8.3(TRGA)/WAKEUPD

RESET

XIN/CLK XOUT/NC

SOUND GEN.

LCD Driver

COM0~COM7

SOUND

SEG0~SEG39

Voice

Synthesizer

* This specification are subject to be changed without notice.

EM73P982

4-BIT MICROCONTROLLER

12.25.2001

P8.1(TRGB)/WAKEUPB I/O-L

2-bit bidirection I/O port with time/counter A,B external input and Sleep

P8.3(TRGA)/WAKEUPD

/Hold releasing function
P8.1/DOUT : Data output for programming OTP
mask option :

wakeup enable, push-pull

wakeup disable, push-pull
wakeup disable, open-drain

Built-in Speech synthesizer analog signal output

SOUND

Built-in sound effect output

COM0~COM7

LCD common output pins

SEG0~SEG39

LCD segment output pins

TEST

Test pin must be floating

VPP

High voltage (12V) power source for programming OTP

P4.0/SOUND

I/O-O

1-bit bidirection I/O port or inverse sound effect output
mask option :

SOUND enable, push-pull, high current PMOS

SOUND disable, open-drain
SOUND disable, push-pull, high current PMOS
SOUND disable, push-pull, low current PMOS

P4(1..3)

I/O-N

3-bit bidirection I/O port with high current source.
mask option :

open-drain
push-pull, high current PMOS
push-pull, low current PMOS

P8.0/WAKEUPA

I/O-L

2-bit bidirection I/O port with external interrupt sources input only for

P8.2(INT0)/WAKEUPC

P8.2 and Sleep/Hold releasing function
P8.0/DIN : Data input for programming OTP
mask option :

wakeup enable, push-pull

wakeup disable, push-pull
wakeup disable, open-drain

Symbol

Pin-type

Function

* This specification are subject to be changed without notice.

EM73P982

4-BIT MICROCONTROLLER

12.25.2001

FUNCTION DESCRIPTIONS

ACCUMULATOR

Accumulator is a 4-bit data register for temporary data. For the arithematic, logic and comparative opertion
.., ACC plays a role which holds the source data and result.

FLAGS

There are three kinds of flag, CF (Carry flag), ZF (Zero flag), SF (Status flag), these 3 1-bit flags are affected
by the arithematic, logic and comparative .... operation.
All flags will be put into stack when an interrupt subroutine is served, and the flags will be restored after
RTI instruction executed.

(1) Carry Flag ( CF )

The carry flag is affected by following operation:
a. Addition : CF as a carry out indicator, when the addition operation has a carry-out, CF will be "1",

in another word, if the operation has no carry-out, CF will be "0".

b. Subtraction : CF as a borrow-in indicator, when the subtraction operation must has a borrow, in the CF

will be "0", in another word, if no borrow-in, CF will be "1".

c. Comparision: CF is as a borrow-in indicator for Comparision operation as the same as subtraction

operation.

d. Rotation: CF shifts into the empty bit of accumulator for the rotation and holds the shift out data after

rotation.

e. CF test instruction : For TFCFC instruction, the content of CF sends into SF then clear itself "0".

For TTSFC instruction, the content of CF sends into SF then set itself "1".

(2) Zero Flag ( ZF )

ZF is affected by the result of ALU, if the ALU operation generate a "0" result, the ZF will be "1",
otherwise, the ZF will be "0".

(3) Status Flag ( SF )

The SF is affected by instruction operation and system status.

a. SF is initiated to "1" for reset condition.

b. Branch instruction is decided by SF, when SF=1, branch condition will be satisified, otherwise,

branch condition will not be satisified by SF = 0.

* This specification are subject to be changed without notice.

EM73P982

4-BIT MICROCONTROLLER

12.25.2001

ZF CF SF

ALU

DATA BUS

PROGRAM EXAMPLE:
Check following arithematic operation for CF, ZF, SF

LDIA #00h;

LDIA #03h;

ADDA #05h;

ADDA #0Dh;

ADDA #0Eh;

ALU

The arithematic operation of 4 - bit data is performed in ALU unit. There are 2 flags can be affected by
the result of ALU operation, ZF and SF. The operation of ALU can be affected by CF only.

ALU STRUCTURE

ALU supported user arithematic operation function, including : addition, subtraction and rotaion.

ALU FUNCTION

(1) Addition:

For instruction ADDAM, ADCAM, ADDM #k, ADD #k,y .... ALU supports addition function.
The addition operation can affect CF and ZF. For addition operation, if the result is "0", ZF will be "1",
otherwise, not equal "0", ZF will be "0". When the addition operation has a carry-out, CF will be "1",
otherwise, CF will be "0".

EXAMPLE:

Operation

Carry

Zero

3+4=7

7+F=6

0+0=0

8+8=0

Part Number EM73P982