AXIOMTEK MANO523 Series, User Manual

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MANO523 Mini ITX Motherboard
18 Board and Pin Assignments
2.4.8 VGA Connector (CN15)
The CN15 is a high rise 15-pin D-Sub connector which is commonly used for VGA
display.
2.4.9 COM Double-deck D-Sub Connector (CN16)
The CN16 is a double-deck D-Sub connector for COM1 and COM2 serial port interfaces.
Only COM2 is selectable for RS-232/422/485 mode by BIOS setting (see section 4.4).
The pin assignments of RS-232/422/485 are listed in table below.
COM1:
COM2:
Note
[*]
: Pin 1 of COM2 can be DCD/+5V and pin 9 of COM2 can be RI/+12V by
selecting JP4 (see section 2.3.3).
Pin Signal Pin Signal
1 Red 2 Green
3 Blue 4 NC
5 GND 6 GND
7 GND 8 GND
9 VCC 10 GND
11 NC 12 DDC DATA
13 Horizontal Sync 14 Vertical Sync
15 DDC CLK
Pin Signal Pin Signal
1 DCD 2 RXD
3 TXD 4 DTR
5 GND 6 DSR
7 RTS 8 CTS
9 RI
Pin RS-232 RS-422 RS-485
1 DCD#
[*]
TX- 485-
2 RXD TX+ 485+
3 TXD RX+ N/C
4 DTR# RX- N/C
5 GND GND GND
6 DSR# N/C N/C
7 RTS# N/C N/C
8 CTS# N/C N/C
9 RI#
[*]
N/C N/C
COM2
COM1