W83C43 Datasheet, PDF (3/21 Pages) Winbond – KEYBOARD CONTROLLER

W83C43
PIN DESCRIPTION
PIN NO.
I/O NAME
FUNCTION
(40-pin
DIP)
(44-pin
PLCC)
AT MODE
PS/2 MODE
1
2
I
T0
K/B Clock Input
K/B Clock Input
2
3
I
X1
Crystal Clock I/P
Crystal Clock I/P
3
4
I
X2
Crystal Clock I/P
Crystal Clock I/P
4
5
I _RESET Chip Reset
Chip Reset
5
6
-
VCC Optional +5V Power
Optional + 5V Power
Supply
Supply
6
7
I
CS
Chip Select
Chip Select
7
8
-
GND Optional Ground Power Optional Ground Power
8
9
I
RD
I/O Read
I/O Read
9
10
I
A2
Connect to Address A2 Connect to Address A2
10
11
I
WR ^{I/O Write}
I/O Write
11, 26 1, 12, 13,
-
23, 29, 34
NC Reserved
Reserved
12, 13, 14, 14, 15, 16, I/O D0−D7 Data Bus D0−D7
15, 16, 17, 17, 18, 19,
18, 19
20, 21
Data Bus D0−D7
20
22
-
GND Ground Power Supply Ground Power Supply
21
24
O
P20 Bit 0 of Port2
Bit 0 of Port2
( RC : System Reset)
( RC : System Reset)
22
25
O
P21 Bit 1 of Port2
Bit 1 of Port2
( GA20 : GATE A20)
( GA20 : GATE A20)
23
26
I/O P22 Bit 2 of Port2
Bit 2 of Port2
(NC: User-defined I/O)
(MDAT: Mouse Data
Output)
24
27
I/O P23 Bit 3 of Port2
Bit 3 of Port2
(NC: User-defined I/O)
(MCLK: Mouse Clock
Output)
25
28
-
VCC Optional +5V Power
Optional + 5V Power
Supply
Supply
Publication Release Date: January 1996
-3-
Revision A2