W921C880 Просмотр технического описания (PDF) - Winbond

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W921C880

4-BIT MICROCONTROLLER

Winbond 

W921E880A/W921C880

5. BLOCK DIAGRAM

PROGRAM

COUNTER

Co-V REG. Co-U REG.

RESET

EPROM

10 * 8K

W REG.

V REG.

U REG.

DECODER

& CONTROL

B REG.

A REG.

STACK

ALU

POINTER

RAM

4 * 1536

PE.0-PE.3

PF.0-PF.3

PORT PE

PORT PF

PORT MODE

REGISTER

XT

XT

OSCI

OSCO

OSCILLATOR

and

SYSTEM

PRESCALER

TIMER 0 TIMER 1 TIMER 2 TIMER 3

PORT P0

PORT P1

PORT P2

PORT P3

PORT P4

PORT P5

PORT P6

PORT P7

PORT P8

PORT P9

PORT PD

PORT PA

PORT PB

VDD

VSS

P3.0(ANI0)

P3.1(ANI1)

P3.2(ANI

2P)3.3(ANI3)

+

P5.2/VREF

-

PORT PC

DTMF GENERATOR

BEEP TONE

GENERATOR

DAMSB

DALSB

D/A CONVERTOR

P5.3/DAOUT

P0.0-P0.3

P1.0-P1.3

P2.0-P2.3

P3.0-P3.3

P4.0-P4.3

P5.0-P5.3

P6.0-P6.3

P7.0-P7.3

P8.0-P8.3

P9.0-P9.3

PD.0-PD.3

PA.0-PA.3

PB.0-PB.3

PC.0-PC.3

DTMF

BTG

Publication Release Date: July 1999

-9-

Revision A3

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