Data General AViiON 5000 Series, Клиентская документация

Страница: 166 / 210

External Device Connector Pin Assignments
C-10
014–001867
VSA SCSI Connectors
SCSI devices connect to the VSA SCSI ports through 50-pin high-density connectors.
Figures C–6 and C–7 show the signals and pin numbers for VSA SCSI connectors for
single-ended and differential interfaces, respectively.
VSA
connector
(female)
Pin Signal
26 Data Bus 0 (DB0)
27 Data Bus 1
28 Data Bus 2
29 Data Bus 3
30 Data Bus 4
31 Data Bus 5
32 Data Bus 6
33 Data Bus 7
34 Data Bus P
35 Ground (GND)
36 Ground
37 Ground
38 Termination Power (TERMPWR)
39 Ground
40 Ground
41 Attention (ATN)
42 Ground
43 Busy (BSY)
44 Acknowledge (ACK)
45 Reset (RST)
46 Message (MSG)
47 Select (SEL)
48 Control/Data (C/D)
49 Request (REQ)
50 Input/Output (I/O)
25
1
26
50
NOTE: For single–ended SCSI connectors, pins 1 through 12 and pins 14 through 25 are
connected to ground. Pin 13 is left open.
Figure C–6 VSA SCSI Connector Signals – Single-Ended Interface