普通的鍵盤接口為5針母插座：
|
鍵盤接口引腳定義 |
PC/XT 鍵盤接口管腳定義：
|
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 |
PC/AT 鍵盤接口引腳定義表：
|
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 |