User guide

1-10

Chapter 1: Motherboard Information

1.10 Jumpers

This section describes and illustrates the jumpers on the motherboard.

1. USB device wake-up (3-pin USBPWR12,USBPWR34,USBPWR56)

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 USBPWR12 jumper is for the rear USB port. USBPWR34 and

USBPWR56 is for the internal USB header that you can connect to

the front USB ports.

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 does not power up.

The total current consumed must NOT exceed the power supply

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

A7S266-VM

A7S266-VM USB Device Wake Up

USBPWR34

USBPWR56

USBPWR12

+5V

(Default)

+5VSB

+5VSB+5V

(Default)

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