键盘针脚定义图
PS2键盘接口引脚定义图
PS/2 键盘接口为 6 针母插，外观为：
|
引脚定义 |
|
Pin |
Name |
Dir |
Description |
|---|---|---|---|
|
1 |
DATA |
|
Key Data |
|
2 |
n/c |
– |
Not connected |
|
3 |
GND |
|
Gnd |
|
4 |
VCC |
|
Power , +5 VDC |
|
5 |
CLK |
|
Clock |
|
6 |
n/c |
– |
Not connected |
键盘接口引脚定义图
键盘接口为 5 针母插座：
|
引脚定义 |
PC/AT 键盘接口的引脚定义：
|
Pin |
Name |
Description |
Technical |
|---|---|---|---|
|
1 |
CLOCK |
Clock |
CLK/CTS, Open-collector |
|
2 |
DATA |
Data |
RxD/TxD/RTS, Open-collector |
|
3 |
n/c |
Not connected |
Reset on some very old keyboards. |
|
4 |
GND |
Ground |
|
|
5 |
VCC |
+5 VDC |
PC/XT 键盘接口的引脚定义稍有不同：
|
Pin |
Name |
Description |
Technical |
|---|---|---|---|
|
1 |
CLOCK |
Clock |
CLK/CTS, Open-collector |
|
2 |
DATA |
Data |
RxD/TxD/RTS, Open-collector |
|
3 |
Reset |
Reset |
|
|
4 |
GND |
Ground |
|
|
5 |
VCC |
+5 VDC |