接口定义
内置SCSI卡接口定义图(单端信号方式)
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 |
---|---|---|---|
2 |
DB0 |
Data Bus 0 | |
4 |
DB1 |
Data Bus 1 | |
6 |
DB2 |
Data Bus 2 | |
8 |
DB3 |
Data Bus 3 | |
10 |
DB4 |
Data Bus 4 | |
12 |
DB5 |
Data Bus 5 | |
14 |
DB6 |
Data Bus 6 | |
16 |
DB7 |
Data Bus 7 | |
18 |
PARITY |
Data Parity (odd Parity) | |
20 |
GND |
Ground | |
22 |
GND |
Ground | |
24 |
GND |
Ground | |
26 |
TMPWR |
Termination Power | |
28 |
GND |
Ground | |
30 |
GND |
Ground | |
32 |
/ATN |
Attention | |
34 |
GND |
Ground | |
36 |
/BSY |
Busy | |
38 |
/ACK |
Acknowledge | |
40 |
/RST |
Reset | |
42 |
/MSG |
Message | |
44 |
/SEL |
Select | |
46 |
/C/D |
Control/Data | |
48 |
/REQ |
Request | |
50 |
/I/O |
Input/Output |
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