Sun Microsystems Interface Adapter, User Manual

Page: 43 / 66

23
A P P E N D I X
A
Cable Pin Assignments & Signals
This appendix includes the following information:
■
“Pin Assignments” on page 23
■
“Interface Signals” on page 27
Pin Assignments
A shielded, hydra-style breakout cable providing four 37-pin, D-shell (DB-37) DTE
connectors is available for the SunHSI/U adapter. Since there are not enough wires
to create the signal ground (pin 19) connections, use the shield ground (pin 1) of the
DB-37 connector for this signal. The pin assignments for the cabling and connectors
are shown in
TABLE A-1
.
TABLE A-1
RS-449 Connector Pin Assignments
80-Pin Amp.
Pin No. RS-449
Signal Name RS-449
DB-37 Pin No.
Description
1 RxD1(A) 6 Port 1 Receive Data
2 RxD1(B) 24 Port 1 Receive Data
3 DTR1(A) 12 Port 1 Data Terminal Ready
4 DTR1(B) 30 Port 1 Data Terminal Ready
5 TxD1(A) 4 Port 1 Transmit Data
6 TxD1(B) 22 Port 1 Transmit Data
7 RTS1(A) 7 Port 1 Request To Send
8 RTS1(B) 25 Port 1 Request To Send
9 TxC1(A) 17 Port 1 Transmit Clock