外置SCSI高密接口引脚定义(单端信号方式)
SCSI 是 Small Computer System Interface 的缩写，外置式高密 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
