Com1 Connector (Com1) - AXIOMTEK IMB523R User Manual

IMB523R / 524R / 525R LGA1151 ATX Motherboard
2.5.5

COM1 Connector (COM1)

This is a high rise 9-pin D-Sub connector for COM1 serial port interface. The pin
assignments of RS-232/422/485 are listed in the table below.
Pin RS-232
1 DCD#
2 RXD
3 TXD
4 DTR#
5 GND
6 DSR#
7 RTS#
8 CTS#
9 RI#
[*]
(see section 2.4.3).
Note
16
[*] [*]
RS-422 RS-485
TX- 485-
TX+ 485+
RX+ N/C
RX- N/C
GND GND
N/C N/C
N/C N/C
N/C N/C
N/C N/C
: Signals of COM1 can be RS-232/422/485 by selecting JP4, JP5 and JP6
[*]
Board and Pin Assignments