Asus b85m-k [20/48] B85m k keyboard and usb device wake up

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Chapter 1: Product introduction

B85M-K

1 2

2 3

+5V

+5VSB

(Default)

B85M-K Keyboard and USB device wake-up

PS2_USBPW1-4

B85M-K

2 3

+5V

(Default)

+5VSB

USBPW5~10

B85M-K USB Device Wake Up

3. USB device wake-up (3-pin USBPW5~10)

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 conditions or in sleep mode.

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.