外置SCSI接口引脚定义(单端信号方式)

外置SCSI接口引脚定义(单端信号方式)

SCSI 是 Small Computer System Interface 的缩写，外置式 50 针接口的外观为母插座：

连接电缆插头为 50 针公插头：
 

引脚定义

Pin	Name	Dir	Description
1-25	GND		Ground
26	DB0		Data Bus 0
27	DB1		Data Bus 1
28	DB2		Data Bus 2
29	DB3		Data Bus 3
30	DB4		Data Bus 4
31	DB5		Data Bus 5
32	DB6		Data Bus 6
33	DB7		Data Bus 7
34	PARITY		Data Parity (odd Parity)
35	GND		Ground
36	GND		Ground
37	GND		Ground
38	TMPWR		Termination Power
39	GND		Ground
40	GND		Ground
41	/ATN		Attention
42	n/c	-	Not connected
43	/BSY		Busy
44	/ACK		Acknowledge
45	/RST		Reset
46	/MSG		Message
47	/SEL		Select
48	/C/D		Control/Data
49	/REQ		Request
50	/I/O		Input/Output