Asus A78M-A - Manual (Page 21)

ASUS A78M-A 1-13
2. Keyboard wake-up (3-pin KB_USBPWB)
This jumper allows you to enable or disable the keyboard wake-up feature. When you
set this jumper to pins 2-3 (+5VSB), you can wake up the computer by pressing a key
on the keyboard. This feature requires an ATX power supply that can supply at least 1A
on the +5VSB lead, and a corresponding setting in the BIOS.
3. USB device wake-up (3-pin USBPWF)
Set this jumper 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.
A78M-A
A78M-A Keyboard and USB device wake up
1
2 2
3
+5V +5VSB
(Default)
KB_USBPWB
A78M-A
A78M-A USB device wake up
2 1 2 3
+5V
(Default)
+5VSB
USBPWF