w83c42 Winbond Electronics Corp America, w83c42 Datasheet - Page 3

• Manufacturer Part Number: w83c42
• Description: Keyboard Controller
• Manufacturer: Winbond Electronics Corp America

PIN DESCRIPTION
12, 13, 14,
15, 16, 17,
(
PIN NO.
40-pin DIP)
11, 26
18, 19
10
20
21
22
23
24
25
27
28
29
30
31
32
33
34
1
2
3
4
5
6
7
8
9
(
14, 15, 16,
17, 18, 19,
44-pin PLCC)
23, 29, 34
1, 12, 13,
PIN NO.
20, 21
10
11
22
24
25
26
27
28
30
31
32
33
35
36
37
38
2
3
4
5
6
7
8
9
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
I
I
I
-
I
-
I
I
I
-
-
-
I
I
I
I
RESET
NAME
D0-D7
X
V
V
V
P20
P21
P22
P23
V
P10
P11
P12
P13
P14
P15
P16
P17
WR
RD
X
CS
NC
A2
T0
OUT
DD
DD
SS
SS
IN
- 3 -
K/B Clock Input
Crystal Clock I/P
Crystal Clock O/P
Chip Reset
Optional +5V Power Supply
Chip Select
Optional Ground Power
I/O Read
Connect to Address A2
I/O Write
Reserved
Data Bus D0 - D7
Ground Power Supply
Bit 0 of Port 2 (RCB: System Reset)
Bit 1 of Port 2 (GA20: GATE A20)
Bit 2 of Port 2
Bit 3 of Port 2
Optional +5V Power Supply
Bit 0 of Port 1
Bit 1 of Port 1
Bit 2 of Port 1
Bit 3 of Port 1
Bit 4 of Port 1 (RAM Jumper Select)
Bit 5 of Port 1 (JUMP)
Bit 6 of Port 1 (Display Select)
Bit 7 of Port 1 (K/B Inhibit Switch)
Publication Release Date: July 1994
FUNCTION
W83C42
Revision A3