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Chapter 1: Product introduction
2. USB device wake-up (3-pin 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.
• 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
2
21
A8V-XE USB Device Wake Up
+5V
(Default)
+5VSB
USBPW2
+5V
(Default)
+5VSB
USBPW1
2
1
3
2
A8V-XE
R
3. Keyboard power (3-pin 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.
A8V-XE Keyboard Power Setting
(Default)
+5V +5VSB
KBPWR
2 31 2
A8V-XE
R