AXIOMTEK PICO52R, User Manual

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PICO52R Pico-ITX Board
Board and Pin Assignments 23
2.5.16 COM Wafer Connectors (SCN1 and SCN2)
This is a 9-pin (pitch=1.25mm) connector which is compliant with Molex 53047-0910.
Both SCN1 (for COM1) and SCN2 (for COM2) support RS-232/422/485 by BIOS
selected (see section 4.4). The pin assignments of RS-232/422/485 are listed in table
below. It is strongly recommended to connect with the matching cable, 59380880250E.
COM1:
COM2:
Pin RS-232 RS-422 RS-485
1 GND GND GND
2 RI1 No use No use
3 DTR1 RX1- No use
4 CTS1 No use No use
5 TX1 RX1+ No use
6 RTS1 No use No use
7 RX1 TX1+ Data+
8 DSR1 No use No use
9 DCD1 TX1- Data-
Pin RS-232 RS-422 RS-485
1 GND GND GND
2 RI2 No use No use
3 DTR2 RX2- No use
4 CTS2 No use No use
5 TX2 RX2+ No use
6 RTS2 No use No use
7 RX2 TX2+ Data+
8 DSR2 No use No use
9 DCD2 TX2- Data-
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