键盘接口定义
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 |
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