EM78P870

8-bit OTP Micro-controller

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* This specification is subject to be changed without notice.

4

8/19/2004 (V1.5)

OTP writer PIN NAME

MASK ROM PIN NAME

P.S.

1.VDD

VDD,AVDD

2.VPP

/RESET

3.DINCK

P77

4.ACLK

P76

5.PGM

P75

6.OE

P74

7.DATA

P73

8.GND

VSS,AVSS,TEST

V.Functional Block Diagram

CPU

TIM ING

CONTROL

TIM ER

TCC

COUNTER 1

COUNTER 2

WDT

PROGRAM

ROM

DATA RAM

CONTROL

REGISTER

LCD DRIVER

LCD

IO

PORT

I/O

KEY TONE

SERIAL I/O

COM PARATOR

PROG. TONE GEN.

Fig.2 Block diagram1

Xin Xout PLLC

Oscillator

timing control

Control sleep

and wake-up

on I/O port

R1(TCC)

WDT timer

prescalar

GENERAL

RAM

R4

Interruption

control

ROM

Instruction

register

Instruction

decoder

R2

STACK

ALU

ACC

R3

R5

DATA & CONTROL BUS

DATA RAM

PORT6

IOC6

R6

P60~P67

PORT7

IOC7

R7

P70~P77

PORT5

IOC5

R5

P55~P57

PROG. TONE GEN.

KEY TONE

COM PARATOR

PORT8

IOC8

R8

P80~P87

PORT9

IOC9

R9

P90~P97

PORTB

IOCB

RB

PB0~PB7

PORTC

IOCC

RC

PC0~PC7

SERIAL I/O

Fig.3 Block diagram2