SCSI卡接口定义图
SCSI 是 Small Computer System Interface 的缩写，在控制器和设备侧的接口外观为 50 针公插座：
连接电缆为 50 针母插头：
|
引脚定义 |
|
Pin |
Name |
Dir |
Description |
|---|---|---|---|
|
01 |
GND |
Ground | |
|
02 |
GND |
Ground | |
|
03 |
+DB0 |
+Data Bus 0 | |
|
04 |
-DB0 |
-Data Bus 0 | |
|
05 |
+DB1 |
+Data Bus 1 | |
|
06 |
-DB1 |
-Data Bus 1 | |
|
07 |
+DB2 |
+Data Bus 2 | |
|
08 |
-DB2 |
-Data Bus 2 | |
|
09 |
+DB3 |
+Data Bus 3 | |
|
10 |
-DB3 |
-Data Bus 3 | |
|
11 |
+DB4 |
+Data Bus 4 | |
|
12 |
-DB4 |
-Data Bus 4 | |
|
13 |
+DB5 |
+Data Bus 5 | |
|
14 |
-DB5 |
-Data Bus 5 | |
|
15 |
+DB6 |
+Data Bus 6 | |
|
16 |
-DB6 |
-Data Bus 6 | |
|
17 |
+DB7 |
+Data Bus 7 | |
|
18 |
-DB7 |
-Data Bus Parity7 | |
|
19 |
+DBP |
+Data Bus Parity (odd Parity) | |
|
20 |
-DBP |
-Data Bus Parity (odd Parity) | |
|
21 |
DIFFSENS |
? |
??? |
|
22 |
GND |
Ground | |
|
23 |
res |
- |
Reserved |
|
24 |
res |
- |
Reserved |
|
25 |
TERMPWR |
Termination Power | |
|
26 |
TERMPWR |
Termination Power | |
|
27 |
res |
- |
Reserved |
|
28 |
res |
- |
Reserved |
|
29 |
+ATN |
+Attention | |
|
30 |
-ATN |
-Attention | |
|
31 |
GND |
Ground | |
|
32 |
GND |
Ground | |
|
33 |
+BSY |
+Bus is busy | |
|
34 |
-BSY |
-Bus is busy | |
|
35 |
+ACK |
+Acknowledge | |
|
36 |
-ACK |
-Acknowledge | |
|
37 |
+RST |
+Reset | |
|
38 |
-RST |
-Reset | |
|
39 |
+MSG |
+Message | |
|
40 |
-MSG |
-Message | |
|
41 |
+SEL |
+Select | |
|
42 |
-SEL |
-Select | |
|
43 |
+C/D |
+Control or Data | |
|
44 |
-C/D |
-Control or Data | |
|
45 |
+REQ |
+Request | |
|
46 |
-REQ |
-Request | |
|
47 |
+I/O |
+In/Out | |
|
48 |
-I/O |
-In/Out | |
|
49 |
GND |
Ground | |
|
50 |
GND |
Ground |