SCSI pin assignments

Pin No.

Signal

I/O

Description

 

 

 

 

1-12, 14-25, 35-37,

GND

—

Ground

39, 40, 42

 

 

 

 

 

 

 

13

NC

—

Not used

 

 

 

 

26-33

DB0-DB7

I/O

Data bus 0-7

 

 

 

 

34

DBP

I/O

Data bus parity

 

 

 

 

38

TERMPWR

—

Terminator power

 

 

 

 

41

ATN

I

Attention

 

 

 

 

43

BSY

I/O

Busy

 

 

 

 

44

ACK

I

Acknowledge

 

 

 

 

45

RST

I

Reset

 

 

 

 

46

MSG

O

Message

 

 

 

 

47

SEL

I/O

Select

 

 

 

 

48

C/D

O

Command/data

 

 

 

 

49

REQ

O

Request

 

 

 

 

50

I/O

O

Input/output

 

 

 

 

Specifications

Page 77