SCSI卡接口界说图
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:
衔接电缆为 50 针母插头:
引脚界说 |
Pin | Name | Dir | DescripTIon |
---|---|---|---|
01 |
GND |
Ground |
|
02 |
GND |
Ground |
|
03 |
+DB0 |
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-Data Bus 0 |
05 |
+DB1 |
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-Data Bus 1 |
07 |
+DB2 |
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-Data Bus 2 |
09 |
+DB3 |
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-Data Bus 3 |
11 |
+DB4 |
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-Data Bus 4 |
13 |
+DB5 |
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-Data Bus 5 |
15 |
+DB6 |
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-Data Bus 6 |
17 |
+DB7 |
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-Data Bus Parity7 |
19 |
+DBP |
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-Data Bus Parity (odd Parity) |
21 |
DIFFSENS |
? |
??? |
22 |
GND |
Ground |
|
23 |
res |
– |
Reserved |
24 |
res |
– |
Reserved |
25 |
TERMPWR |
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TerminaTIon Power |
27 |
res |
– |
Reserved |
28 |
res |
– |
Reserved |
29 |
+ATN |
+AttenTIon |
|
30 |
-ATN |
-Attention |
|
31 |
GND |
Ground |
|
32 |
GND |
Ground |
|
33 |
+BSY |
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-Bus is busy |
35 |
+ACK |
+Acknowledge |
|
36 |
-ACK |
-Acknowledge |
|
37 |
+RST |
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-Reset |
39 |
+MSG |
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-Message |
41 |
+SEL |
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-Select |
43 |
+C/D |
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-Control or Data |
45 |
+REQ |
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-Request |
47 |
+I/O |
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-In/Out |
49 |
GND |
Ground |
|
50 |
GND |
Ground |