AAEON IMBA-H61A - Manual (Page 29)

2-21 Chapter 2: Motherboard information
9. Serial port connectors (10-1 pin COM1/2, COM3~6)
These connectors are for serial (COM) ports. Connect the serial port module
cable to this connector, then install the module to a slot opening at the back
of the system chassis.
The COM module is purchased separately.
IMBM-H61A Serial port connectors
PIN 1
COMBH2
RI
RTS
GND
TXD
DCD
CTS
DSR
DTR
RXD
PIN 1
COM4
RI
RTS
GND
TXD
DCD
CTS
DSR
DTR
RXD
PIN 1
COM5
RI
RTS
GND
TXD
DCD
CTS
DSR
DTR
RXD
PIN 1
COM6
RI
RTS
GND
TXD
DCD
CTS
DSR
DTR
RXD
PIN 1
COM3
RI
RTS
GND
TXD
DCD
CTS
DSR
DTR
RXD
IMBA-H61A DIO connector
PIN 1
DIO1
GPIO50(DIO_P#1) GPIO53 (DIO_P#3) GPIO55 (DIO_P#5) GPIO57(DIO_P#7)
+5V
GPIO51 (DIO_P#2) GPIO54(DIO_P#4) GPIO56(DIO_P#6) GPIO58 (DIO_P#8) GND
10. Digital I/O connector (10-pin DIO1)
This connector includes 8 I/O lines. All of the Digital I/O lines are
programmable and each I/O pin can be individually programmed to support
various devices.