Asus P4P800S-X User's Guide download pdf (Page 26)

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Chapter 1: Product introduction

2. USB device wake-up (3-pin USBPW1, USBPW2, USBPW3, USBPW4)

Set these jumpers to +5VSB 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 sleep mode (no

power to CPU, DRAM in slow refresh, power supply in reduced power mode).

Both jumpers are set to pins 1-2 (+5VSB) by default because not all computers

have the appropriate power supply to support this feature.

The USBPW1 and USBPW2 jumpers are for the rear USB ports. The USBPW3

and USBPW4 jumpers are for the internal USB header that you can connect to

the front USB ports.

1. This feature requires a power supply that can provide at least 1A on the

+5VSB lead when these jumpers are set to +5VSB. Otherwise, the system

would not power up.

2. The total current consumed must NOT exceed the power supply capability

(+5VSB) whether under normal condition or in sleep mode.

3. The rear panel USB ports (Ports 1 to 4) do not support device wake-up

from S4 sleep mode.

P4P800S-X

P4P800S-X USB Device Wake Up

+5V

(Default)

+5VSB

USBPW3

USBPW4

+5V

(Default)

+5VSB

USBPW1

USBPW2

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Asus P4P800S-X User's Guide Page 26