w83c42 Winbond Electronics Corp America, w83c42 Datasheet - Page 13

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w83c42

Manufacturer Part Number

w83c42

Description

Keyboard Controller

Manufacturer

Winbond Electronics Corp America

Datasheet

1.W83C42.pdf (15 pages)

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Application Circuit, continued

Synchronous

RESETB

D0 - D7

IORB

IOWB

PCLK

SA2

39

10

12

13

14

15

16

17

18

19

2

3

4

1

9

6

8

RD

X1

X2

RESET

T0

T1

A2

CS

WR

D0

D1

D2

D3

D4

D5

D6

D7

P26/KCLK

P27/KDAT

P14/RAM

P15/MOD

P16/DIS

P17/INH

P20/RCB

P21/A20

P10

P11

P12

P13

P22

P23

P24

P25

27

28

29

30

31

32

33

34

21

22

23

24

35

36

37

38

KEYBOARD DATA

- 13 -

KEYBOARD CLOCK

RCB

GATE A20

1

U?A

74ALS04

2

Publication Release Date: July 1994

1

3

U?A

7407

U?B

7407

KEYBOARD INHIBIT SWITCH

KEYBOARD INTERRUPT

MANFACTURING MODE JUMPER

RAM SELECT JUMPER

DISPLAY TYPE SWITCH

2

4

V

DD

V

DD

KEYBOARD CLOCK

KEYBOARD DATA

W83C42

Revision A3

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