Aaeon SBC-590, User Manual

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Chapter 3 Connecting Peripherals 31
Power Connector (CN19)
Pin Function
1 +12V
2 GND
3 GND
4 +5V
Power Connector (CN15)
Pin Function
1 GND
2 -5V
3 GND
4 -12V
Serial Ports (CN18, CN12)
The SBC-590 offers two RS-232 serial ports, COM1 and COM2,
which let you connect to serial devices (a mouse, printers, etc.)
or a communication network. CN18 is COM1, and CN12 is
COM2.
You can disable each port or select its
address (3F8H [COM1], 2F8H [COM2] or
3E8H) using the BIOS Advanced Setup
program, covered in Chapter 4.
Different devices implement the RS-232
standard in different ways. If you are having problems with a serial
device, be sure to check the pin assignments for the connector.
The following figure shows the pin assignments for the card's RS-
232 ports:
RI
C T S
R T S
D C D
D S R
D T R
R X
T X
G N D
1
2
4
5
3
6
8
9
7