Jumpers - Asus P4S-X User Manual

1.11

Jumpers

1. USB device wake-up (3-pin USBPW12, USBPW34, USBPW56)
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 sleep mode (no
power to CPU, DRAM in slow refresh, power supply in reduced power mode).
Both jumpers are set to pins 1-2 (+5V) by default because not all computers
have the appropriate power supply to support this feature.
The USBPW12 and USBPW34 jumpers are for the rear USB ports. The
USBPW56 jumper is 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
2. The total current consumed must NOT exceed the power supply capability
®
P4S-X
P4S-X USB Device Wake Up
1-14
+5VSB lead when these jumpers are set to +5VSB. Otherwise, the system
would not power up.
(+5VSB) whether under normal condition or in sleep mode.
USBPW34
USBPW12
1 2 2 3
+5V +5VSB
(Default)
USBPW56
1 2 2 3
+5VSB
+5V
(Default)
Chapter 1: Product introduction