Usb Device Wake-Up - Asus H81M-K User Manual

2. Keyboard and USB device wake-up (3-pin PS2_KBPW1~4)
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.
H81M-K Keyboard and USB device wake-up
3. USB device wake-up (3-pin USBPW)
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).
H81M-K USB Device Wake Up
•
•
1-12
PS2_USBPW1-4
H81M-K
+5V
USBP5-10
H81M-K
1 2
+5V
(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 conditions or in sleep mode.
+5VSB
(Default)
2 3
+5VSB
Chapter 1: Product introduction