AT&T 3B2/300 Technical Reference Manual page 789

- - - - - - - - - - - - - - - - - A p p e n d i x : CONNECTOR AND CABLING INFORMATION
50-PIN CM521A DIFFERENTIAL SCSI HOST ADAPTER CARD BUS O AND 1 CONNECTORS
PIN DESCRIPTION
FUNCTION
01 GROUND GROUND
02 GROUND GROUND
03 +DATA BUS BIT O (+DBO) INPUT /OUTPUT
04 -DATA BUS BIT O (-DBO) INPUT /OUTPUT
05 +DATA BUS BIT 1 (+DBl) INPUT /OUTPUT
06
-DATA BUS BIT 1 (-DBl)
INPUT /OUTPUT
07
+DATA BUS BIT 2 (+DB2)
INPUT /OUTPUT
08 -DATA BUS BIT 2 (-DB2) INPUT /OUTPUT
09 +DATA BUS BIT 3 (+DB3) INPUT/OUTPUT
10
-DATA BUS BIT 3 (-DB3)
INPUT /OUTPUT
11
+DATA BUS BIT 4 (+DB4) INPUT /OUTPUT
12 -DATA BUS BIT 4 (-DB4) INPUT /OUTPUT
13 +DATA BUS BIT 5 (+DBS) INPUT /OUTPUT
14 -DATA BUS BIT 5 (-DBS) INPUT /OUTPUT
15 +DATA BUS BIT 6 (+DB6) INPUT /OUTPUT
16 -DATA BUS BIT 6 (-DB6) INPUT/OUTPUT
17 +DATA BUS BIT 7 (+DB7) INPUT /OUTPUT
18 -DATA BUS BIT 7 (-DB7) INPUT/OUTPUT
19 +DATA BUS PARITY BIT (+DBP) INPUT /OUTPUT
20 -DATA BUS PARITY BIT (-DBP) INPUT /OUTPUT
21 DIFFERENTIAL SENSE INPUT/OUTPUT
22 GROUND GROUND
23 GROUND GROUND
24 GROUND GROUND
25
TERMINATOR POWER
POWER
26
TERMINATOR POWER POWER
27 GROUND GROUND
28
GROUND
GROUND
29
+ATTENTION
INPUT /OUTPUT
30 -ATTENTION INPUT/OUTPUT
31 GROUND GROUND
32 GROUND
GROUND
33 +BUSY
INPUT /OUTPUT
34 -BUSY
INPUT /OUTPUT
35
+ACKNOWLEDGE
INPUT /OUTPUT
36 -ACKNOWLEDGE
INPUT /OUTPUT
37 +RESET OUTPUT
38 -RESET OUTPUT
39
+MESSAGE
INPUT /OUTPUT
40
-MESSAGE
INPUT /OUTPUT
41 +SELECT
INPUT /OUTPUT
42 -SELECT
INPUT /OUTPUT
43
+CONTROL/DATA INPUT/OUTPUT
44 -CONTROL/DA TA
INPUT /OUTPUT
45 +REQUEST
INPUT /OUTPUT
46 -REQUEST
INPUT /OUTPUT
47 +INPUT /OUTPUT
INPUT/OUTPUT
48 -INPUT /OUTPUT
INPUT /OUTPUT
49 GROUND
GROUND
so
GROUND GROUND
CONNECTOR AND CABLING INFORMATION B-207