2. USB devi ce wake-up (3-pi n USBPW1, USBPW2)

Set these jumpers to +5V to wake up the computer from S1 sleep mode (CPU stopped, DRAM refreshed, system running in low power mode) using the connected USB devices. Set to +5VSB to wake up from S3 and S4 sleep modes (no power to CPU, DRAM in slow refresh, power supply in reduced power mode).

The USBPW1 jumper is for the rear USB ports. The USBPW2 jumper is for the internal USB connectors.

 

 

USBPW1

 

 

2

 

3

 

 

 

2

 

 

1+5V

+5VSB

A8V-XE

(Default)

 

 

 

 

USBPW2

 

 

1

2

2

3

A8V-XE USB Device Wake

+5V

+5VSB

(Default)

 

 

•The USB device wake-up feature requires a power supply that can

provide 500mA on the +5VSB lead for each USB port; otherwise, the system would not power up.

•The total current consumed must NOT exceed the power supply capability (+5VSB) whether under normal condition or in sleep mode.

3. Keyboard power (3-pi n KBPWR)

This jumper allows you to enable or disable the keyboard wake-up feature. Set this jumper to pins 2-3 (+5VSB) if you wish to wake up the computer when you press a key on the keyboard (the default is the Space Bar). This feature requires an ATX power supply that can supply at least 1A on the +5VSB lead, and a corresponding setting in the BIOS.

KBPWR

1

2

2

3

+5V +5VSB (Default)

A8V-XE

A8V-XE Keyboard Power Setting

1-20

Chapter 1: Product introduction