Table of Contents
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Table 1 lists the pin assignments for each connector
type. Definitions of the various signals may be found
in any SCSI design reference book. The SCSI inter-
face is fully defined in ANSI X3.131-1986; this docu-
ment is available from Global Engineering
Documents, 2805 McGaw Ave, Irvine, CA
92713-9539 USA, telephone (714) 261-1455.
Pin
Alt. 1
Internal
External
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
8
Adaptec Customer Support Services
For information on software upgrades, new releases, technical
advice, and other topics, call Adaptec's Electronic Bulletin
Board Service (BBS) 24 hours a day at 408-945-7727;
1200/2400/9600/14400 baud, 8 data bits, 1 stop bit, no parity.
Alt. 2
Function
1
Gnd
2
Gnd
3
Gnd
4
Gnd
5
Gnd
6
Gnd
7
Gnd
8
Gnd
9
Gnd
10
Gnd
11
Gnd
12
Gnd
13
Open
14
Gnd
15
Gnd
16
Gnd
17
Gnd
18
Gnd
19
Gnd
20
Gnd
21
Gnd
22
Gnd
23
Gnd
24
Gnd
25
Gnd
Function
-DB0
-DB1
-DB2
-DB3
-DB4
-DB5
-DB6
-DB7
-DBP
Gnd
Gnd
Gnd
Termpwr
Gnd
Gnd
-ATN
Gnd
-BSY
-ACK
-RST
-MSG
-SEL
-C/D
-REQ
-I/O
10
External SCSI
Connector
Pin
Alt. 1
Internal
External
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
Alt. 2
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
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