键盘接口引脚定义图

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