25针外置SCSI接口

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SCSI 是 Small Computer System Interface 的缩写，外置式 25 针接口为扫描仪等低速设备使用，接口外观为母插座：

25 PIN D-SUB FEMALE

连接电缆插头为 25 针公插头：
25 PIN D-SUB MALE

引脚定义

　

Pin Name Dir Description
1 GND --- Ground
2 DB1 <-> Data Bus 1
3 DB3 <-> Data Bus 3
4 DB5 <-> Data Bus 5
5 DB7 <-> Data Bus 7
6 GND --- Ground
7 /SEL <-> Select
8 GND --- Ground
9 TMPWR <-> Termination Power
10 /RST <-> Reset
11 C/D --> Control/Data
12 I/O --> Input/Output
13 GND --- Ground
14 DB0 <-> Data Bus 0
15 DB2 <-> Data Bus 2
16 DB4 <-> Data Bus 4
17 DB6 <-> Data Bus 6
18 PARITY <-> Data Parity
19 GND --- Ground
20 /ATN <-- Attention
21 /MSG --> Message
22 /ACK <-- Acknowledge
23 BSY <-> Busy
24 /REQ --> Request
25 GND --- Ground