4.USB device wake-up (3-pin USBPWR_12, USBPWR_34, USBPWR_56)

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).

The USBPWR_12 and the USBPWR_34 jumpers are for the four rear USB 2.0 ports. The USBPWR_56 is for the internal USB header.

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 does not power up.

2.The total current consumed must NOT exceed the power supply capability (+5VSB) whether under normal condition or in sleep mode.

USBPWR_34

 

3

2

2

1

 

+5V+5VSB (Default)

USBPWR_12

USBPWR_56

P4B533-M

1

2

 

2

3

 

 

 

 

 

+5V+5VSB

P4B533-M USB Device Wake Up (Default)

2-18

Chapter 2: Hardware information