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 specification that supports up to

480Mbps connection speed.

USB56

USB34

USB+5V USB P5- USB P5+ GND NC

USB+5V USB P3- USB P3+ GND NC

A55BM-A/USB3

 

PIN 1

PIN 1

USB+5V USB P6- USB P6+ GND

USB+5V USB P4- USB P4+ GND

A55BM-A/USB3 USB2.0 connectors

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.

COM

RXDDTRDSRCTS

PIN 1

DCDTXDGNDRTSRI

A55BM-A/USB3

A55BM-A/USB3 Serial port connectors

The COM module is purchased separately.

1-20

Chapter 1: Product introduction