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

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