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Chapter 1: Product introduction
8. USB 2.0 connectors (10-1 pin USB34, USB56)
These connectors are for USB 2.0 ports. Connect the USB module cable to any of
these connectors, then install the module to a slot opening at the back of the system
chassis. These USB connectors comply with USB 2.0 specication that supports up to
480Mbps connection speed.
Never connect a 1394 cable to the USB connectors. Doing so will damage the
motherboard!
The USB 2.0 module is purchased separately.
9. Serial port connector (10-1 pin COM)
This connector is for a serial (COM) port. 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.
A55BM-A/USB3
A55BM-A/USB3
Serial port connectors
PIN 1
COM
D
C
D
D
X
T
D
N
G
S
T
R
I
R
D
X
R
R
T
D
R
S
D
S
T
C
A55BM-A/USB3
A55BM-A/USB3 USB2.0 connectors
PIN 1
USB+5V
USB_P5-
USB_P5+
GND
NC
USB+5V
USB_P6-
USB_P6+
GND
USB56 USB34
PIN 1
USB+5V
USB_P3-
USB_P3+
GND
NC
USB+5V
USB_P4-
USB_P4+
GND