外置SCSI高密接口(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:

50 PIN HI-DENSITY D-SUB FEMALE

连接电缆插头为 50 针公插头:
50 PIN HI-DENSITY D-SUB MALE

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


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