W83C43 datasheet(4/21 Pages) WINBOND

Part #	W83C43

Description	KEYBOARD CONTROLLER

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Manufacturer	WINBOND [Winbond]

Direct Link	http://www.winbond.com

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W83C43

- 4 -

Pin Description, continued

PIN NO.

I/O

NAME

FUNCTION

(40-pin

DIP)

(44-pin

PLCC)

AT MODE

PS/2 MODE

27

30

I/O

PU*

P10

Bit 0 of Port1

(User-defined I/O)

Bit 0 of Port1

(K/B Data Input)

28

31

I/O

PU*

P11

Bit 1 of Port1

(User-defined I/O)

Bit 1 of Port1

(Mouse Data Input)

29

32

I/O

P12

Bit 2 of Port2

(User-defined I/O)

Bit 2 of Port2

(User-defined I/O)

30

33

I/O

P13

Bit 3 of Port1

(User-defined I/O)

Bit 3 of Port1

(User-defined I/O)

31

35

I

PU*

P14

Bit 4 of Port1

(RAM: RAM Jumper

Select)

Bit 4 of Port1

(RAM: RAM Jumper

Select)

32

36

I

PU*

P15

Bit 5 of Port1

(JUMP: Jumper)

Bit 5 of Port1

(JUMP: Jumper)

33

37

I

PU*

P16

Bit 6 of Port1

(DISP: Display Select)

Bit 6 of Port1

(DISP: Display Select)

34

38

I

PU*

P17

Bit 7 of Port1

(KINH: K/B Inhibit Switch)

Bit 7 of Port1

(KINH: K/B Inhibit Switch)

35

39

O

P24

Bit 4 of Port2

(KINT: K/B OBF O/P

Interrupt)

Bit 4 of Port2

(KINT: K/B OBF O/P

Interrupt)

36

40

O

P25

Bit 5 of Port2

(IEMP: I/P Buffer Empty)

Bit 5 of Port2

(MINT: Mouse OBF O/P

Interrupt)

37

41

O

P26

Bit 6 of Port2

(KCLK: K/B Clock Output)

Bit 6 of Port2

(KCLK: K/B Clock Output)

38

42

O

P27

Bit 7 of Port2

(KDAT: K/B Data Output)

Bit 7 of Port2

(KDAT: K/B Data Output)

39

43

I

T1

K/B Data Input

Mouse Clock Input

40

44

-

Vcc

+5V Power Supply

* Internal pull-up resistor

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