Specifications

Hardware Configuration
2–22
Pin Signal Function
2
4
6
8
10
12
14
16
18
26
32
34
36
38
40
42
44
46
48
50
-DB0
-DB1
-DB2
-DB3
-DB4
-DB5
-DB6
- DB7
-DBP
TERM PWR
-ATN
GROUND
-BSY
-ACK
-RST
-MSG
-SEL
-C/D
-REQ
-I/O
Data Bit 0 (LSB
Data Bit 1
Data Bit 2
Data Bit 3
Data Bit 4
Data Bit 5
Data Bit 6
Data Bit 7
Data Parity
Termination +5VDC
Attention
Signal Ground
Busy
Transfer Acknowledge
Reset
Message
Select
Control/Data
Transfer Request
Data direction
25 N/A Key pin
1-49(odd)
20,22,24
28,30
GROUND Signal Grounds
Table 2-17 SCSI Interface Connector (J9)
Connector Type Mating Connector
RIBBON 3M 3425-7600
DISCRETE WIRE MOLEX HOUSING 22-55-2502
PIN 16-02-0103
Table 2-18 J9 Mating Connector
2.10.1 SCSI Interface Configuration
Configure the SCSI interface according to your system’s needs. This is covered in the following
paragraphs.
I/O Address Assignment
The base I/O address of the SCSI hardware is set to 340h at the factory. Addresses between 340h and
35Fh are used. If this address space is required for another purpose, the SCSI hardware I/O range can