A–4
Specifications
Table A–1
MMJ Pin Out
Pin
Signal Name
1
Ready-Out or DSR
1
2
Transmit (TXA)
3
Transmit return (RC)
4
Receive return (RXB)
5
Receive (RXA)
6
Ready-In or DTR
2
1
This signal is pulled high when power is applied to the DECserver 90L.
2
This signal is tied to ground through a 3K ohm resistor.
Figure A–1 shows the circuit connections for each port.
Ready-Out or DSR
Transmit
Transmit Return
Receive Return
Receive
Ready-In or DTR
1
MMJ
+5V
150
3K
EIA
423
Driver
EIA
423
Recv’r
2
3
4
5
6
LJ-00562-TI0.DG
Figure A–1
Port Circuit