键盘接口定义
| [ 返回目录 ] |
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 |