AXIOMTEK PICO300, User Manual, Page: 69 / 96

PICO300 Pico-ITX Board
I/O Boards (Optional) 63
A.6.5 VGA and COM1 D-Sub Connector (CN6A and CN6B)
The lower 15-pin D-Sub connector (CN6A) is for VGA interface and the upper 9-pin
D-Sub connector (CN6B) is for COM1 serial port interface. Note that CN6B is also
equipped with power capability on DCD and RI pins by setting JP1 (see section A.5.1). If
you need COM1 port to support RS-422 or RS-485 mode, please do it via BIOS setting
(see section 4.4). The pin assignments of RS-232/422/485 are listed in table below.
CN6B
CN6A
The CN6A is a standard type 15-pin D-Sub connector which is commonly used for VGA
monitor. This VGA interface configuration can be configured via software utility.
CN6B Pin RS-232 RS-422 RS-485
1 DCD TX- Data-
2 RXD TX+ Data+
3 TXD RX+ No use
4 DTR RX- No use
5 GND No use No use
6 DSR No use No use
7 RTS No use No use
8 CTS No use No use
9 RI No use No use
CN6A Pin Signal Pin Signal
1 Red 2 Green
3 Blue 4 N.C.
5 GND 6 GND
7 GND 8 GND
9 VCC 10 GND
11 N.C. 12 DDC DATA
13 Horizontal Sync 14 Vertical Sync
15 DDC CLK