外置SCSI接口引脚定义(单端信号方式)

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