AD278A/AD279A PCI MUX Support Guide, June 2006

Peripheral Connections
RS-232 Asynchronous: RJ-45
Appendix B
51
IMPORTANT Some terminal or printer manufacturers may use different methods of flow control. Consult
your documentation for specific wiring requirements.
RJ45 Fully-Wired Terminal/Printer Cable
Using a 10-pin RJ45 plug, the cable wiring shown in Table B-9 supports most serial terminals or printers
with either software of hardware handshaking. This cable is valid with any RoHS RJ45 serial port.
Most terminals and printers use Request to Send/Clear to send (RTS/CTS) for hardware handshaking. The
cable shown supports this method.
Table B-9 lists the pin-out connection between the RJ45 adapter and the DB25 terminal/printer with
RTS/CTS handshaking.
TxD 4 Connected to 3 RxD
RxD 5 Connected to 2 TxD
SG 6 Connected to 7 SG
CTS 7 Connected to 4 RTS
DTR 8 Connected to 8 DCD
Table B-9 Terminal/Printer Cable for Software (XON/XOFF) or Hardware
(RTS/CTS) Handshaking
RJ-45 8 10-Pin (Card End)
DB-25 Male
(Terminal/Printer)
Signal Pin Pin Signal
DSR+
DCD*
2+10 Connected to 20 DTR
RTS 3 Connected to 5 CTS
GND 4 Connected
(via shield)
to
Shell GND
TxD 5 Connected to 3 RxD
RxD 6 Connected to 2 TxD
SG 7 Connected to 7 SG
Table B-8 Terminal/Printer Cable with RTS/CTS Handshaking (Continued)
RJ-45 (Card End)
DB-25 Male (Peripheral)