Digital Equipment AXPpci 33, Design Manual

Page: 34 / 98

Physical Description
Table 2–15 (Cont.) SCSI–2 Connector Pin-Out (J19)
Pin
Number
Function
Pin
Number
Function
15 Ground 16 DB 7 L
17 Ground 18 PB L
19 Ground 20 Ground
21 Ground 22 Ground
23 No connection 24 No connection
25 No connection 26 TERM POWER
27 No connection 28 No connection
29 Ground 30 Ground
31 Ground 32 ATN L
33 Ground 34 Ground
35 Ground 36 BSY L
37 Ground 38 ACK L
39 Ground 40 RST L
41 Ground 42 MSG L
43 Ground 44 SEL L
45 Ground 46 C/D L
47 Ground 48 REQ L
49 Ground 50 I/O L
2.2.2.16 Serial Ports COM1 (J35) and COM2 (J37)
Each serial port has a 10-position (2 x 5) connector (J35 and J37). If
required, you can add an adapter cable from these serial port connectors to
an appropriate user connector. You can interface the pin-out of these two
connectors to 9-position D connectors using IDCs on both ends. If you use
this 9-position cable adapter, it must be an industry-standard DTK type
for compatibility.
Table 2–16 lists the pin numbers and functions of the serial ports COM1
and COM2 connectors.
Table 2–16 Serial Ports COM1 (J35) and COM2 (J37) Pin-Outs
Pin
Number
Function
Pin
Number
Function
1 DCD 6 DSR
2 Serial In 7 RTS
3 Serial Out 8 CTS
4 DTR 9 RI
5 Ground 10 No pin installed
2–16