Asus Z77-A Specifications download pdf (Page 35)

2. USB device wake-up (3-pin USBPFW)

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.

Z77-A

Z77-A USB device wake up

2 3

+5V

(Default)

+5VSB

USBPWF

3. Keyboard power (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.

Z77-A

Z77-A Keyboard and USB device wake up

1 2

2 3

+5V

+5VSB

(Default)

KB_USBPWB

ASUS Z77-A

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Asus Z77-A Specifications Page 35