W742C81A データシートの表示（PDF） - Winbond

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W742C81A

4-BIT MICROCONTROLLER

Winbond 

Preliminary W742E81A/W742C81A

Pin Description, continued

SYMBOL I/O

FUNCTION

VPP

I Voltage control pin for the flash EEPROM programming, erasing and verifying.

This pin has the built-in pull-low resistor.

MODE

I This pin can be used as mode selection control; data read/write clock;

program/erase control or address counter control in the flash EEPROM erasing,

programming or verifying mode. This pin has the built-in pull-low resistor.

DATA

I/O Data I/O pin with the built-in pull-low resistor.

5. BLOCK DIAGRAM

SEG0~SEG39 COM0~COM3

VDD1-2 DH1-2

RAM

(2048*4)

VPP

DATA

MODE

Flash

EEROM

(16384*16)

(look_up table

64K*4)

+1(+2)

PC

STACK

(16 Levels)

Timer 0

(8 Bit)

Watch Dog Timer

(4 Bit)

LCD DRIVER

ACC

ALU

PORT RA

PORT RB

PORT RC

Central Control

Unit

IEF

HEF PEF

HCF EVF SEF

PSR0 SCR

PR

PM0 MR0 MR1

. . . PM1 DTMF DTCR

PORT RD

PORT RE

PORT RF

DTMF

Generator

Timer 1

(8 Bit)

Modulation

Frequency

Pulse

SEL

MUX

Divider 1

(12/14 Bit)

Divider 0

(14 Bit)

Timing Generator

RA0-3

RB0-3

RC0-3

RD0-3

RE0-3

RF0-3

DTMF

MFP

VDD

VSS

RES

XIN1 XOUT1 XIN2 XOUT2

-6-

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