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 |