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參數(shù)資料
| 型號(hào)： | W83C42P |
| 英文描述： | KEYBOARD CONTROLLER |
| 中文描述： | 鍵盤控制器 |
| 文件頁數(shù)： | 3/15頁 |
| 文件大小： | 89K |
| 代理商： | W83C42P |
W83C42
Publication Release Date: July 1994
- 3 -
Revision A3
PIN DESCRIPTION
PIN NO.
(
40-pin DIP)
PIN NO.
(
44-pin PLCC)
I/O
NAME
FUNCTION
1
2
I
T0
K/B Clock Input
2
3
I
X
IN
Crystal Clock I/P
3
4
O
X
OUT
Crystal Clock O/P
4
5
I
RESET
V
DD
Chip Reset
5
6
-
Optional +5V Power Supply
6
7
I
CS
V
SS
Chip Select
7
8
-
Optional Ground Power
8
9
I
RD
A2
I/O Read
9
10
I
Connect to Address A2
10
11
I
WR
NC
I/O Write
11, 26
1, 12, 13,
23, 29, 34
-
Reserved
12, 13, 14,
15, 16, 17,
18, 19
14, 15, 16,
17, 18, 19,
20, 21
I/O
D0-D7
Data Bus D0 - D7
20
22
-
V
SS
Ground Power Supply
21
24
O
P20
Bit 0 of Port 2 (RCB: System Reset)
22
25
O
P21
Bit 1 of Port 2 (GA20: GATE A20)
23
26
I/O
P22
Bit 2 of Port 2
24
27
I/O
P23
Bit 3 of Port 2
25
28
-
V
DD
Optional +5V Power Supply
27
30
I/O
P10
Bit 0 of Port 1
28
31
I/O
P11
Bit 1 of Port 1
29
32
I/O
P12
Bit 2 of Port 1
30
33
I/O
P13
Bit 3 of Port 1
31
35
I
P14
Bit 4 of Port 1 (RAM Jumper Select)
32
36
I
P15
Bit 5 of Port 1 (JUMP)
33
37
I
P16
Bit 6 of Port 1 (Display Select)
34
38
I
P17
Bit 7 of Port 1 (K/B Inhibit Switch)
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