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EM73A88A

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

ELAN Microelectronics 

FUNCTION BLOCK DIAGRAM

EM73A88A

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

Preliminary

RESET

CLK LXIN LXOUT

Reset

Control

Clock

Generator

Timing

Generator

Interrupt

Control

Instruction Decoder

Instruction Register

Time

Base

Timer/Counter

(TA,TB)

ROM

PC

System Control

Data pointer

ACC

ALU

Flag

ZC S

Clock Mode

Control

Stack pointer

Stack

RAM

HR LR

V1~V5

VA,VB

LCD Driver

Speech

Sound

synthesizer Generator

I/O Control

P0.0/WAKEUP0

P0.1/WAKEUP1

P0.2/WAKEUP2

P0.3/WAKEUP3

PIN DESCRIPTIONS

Symbol

Pin-type

Function

VDD,VDD2

VSS

RESET

RESET-A

Power supply (+)

Power supply (-)

System reset input signal, low active

mask option :

none

pull-up

CLK

OSC-G

Capacitor connecting pin for internal high frequency oscillator.

LXIN

OSC-B/OSC-H Crystal or RC osc connecting pin for low speed clock source.

LXOUT

OSC-B

Crystal osc connecting pin for low speed clock source.

P0(0..3)/WAKEUP0..3 INPUT-B

4-bit input port with IDLE/STOP releasing function

mask option :

wakeup enable, pull-up

wakeup enable, none

wakeup disable, pull-up

wakeup disable, pull-down

wakeup disable, none

P4(0..3)

I/O-O

4-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(INT1)/WAKEUPA I/O-L

2-bit bidirection I/O port with external interrupt sources input and IDLE

P8.2(INT0)/WAKEUPC

/STOP releasing function

mask option :

wakeup enable, push-pull

wakeup disable, push-pull

wakeup disable, open-drain

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

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

P8.3(TRGA)/WAKEUPD

/STOP releasing function

* This specification are subject to be changed without notice.

10.8.2001 2

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