3-4
Chapter 3: Motherboard info
2. USB device wake-up (3-pin USBPW1-4, USBPW56)
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 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-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.
M 3 R 7 8 L
R
M3R78L Keyboard Power Setting
2
3
1
2
(Default)
+5V
+5VSB
KBPWR
M 3 R 7 8 L
R
M3R78L USB Device Wake Up
3
2
2
1
USBPW56
(Default)
+5V
+5VSB
3
2
2
1
USBPW1-4
(Default)
+5V
+5VSB
