W921E841A Просмотр технического описания (PDF) - Winbond

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W921E841A

4-BIT MICROCONTROLLER

Winbond 

5. BLOCK DIAGRAM

W921E840A/W921C840

OSCI

OSCO

XT

XT

RESET

VDD

VSS

W Reg. V Reg.

Co-V

Reg.

U Reg.

Co-U

Reg.

Program

Counter

EPROM

8K x 10

Decoder and

Control

Circuit

Stack

Pointer

Oscillator

and

System

Control

Prescaler

B Reg.

A Reg.

ALU

RAM

512 x 4

Port Mode

Register

Timer 0

Timer 1

Timer 2

Timer 3

MUX

(ANI0 to ANI3)

+

-

P5.2/VREF or

P5.3/DAOUT

MUX

Port P2

Port P3

Port P4

Port P5

Port P6

Port PA

Port PB

Port PC

Port PD

DTMF

Generator

Beep Tone

Generator

D/A Convertor

D/A MSB D/A LSB

P2.0-P2.3

P3.0-P3.3

P4.0-P4.3

P5.0-P5.3

P6.0-P6.3

PA.0-PA.3

PB.0-PB.3

PC.0-PC.3

PD.0-PD.1

DTMF

BTG

- 10 -

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