2.USB device wake-up(3-pin USBPW1-4, 3-pin USBPW5-8, 3-pin USBPW910)

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 S4 sleep mode (no power to CPU, DRAM in slow refresh, power supply in reduced power mode).

P5B-E

P5B-E USB device wake-up

USBPW1-4

2

3

2

1

 

+5V

+5VSB

(Default)

 

USBPW5-8

USBPW910

1

2

 

2

3

 

 

 

 

 

+5V +5VSB (Default)

•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 will not power up.

•If you are using Windows® 2000, you need to install Service Pack 4 to wake up the system from S4 sleep mode.

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

3.Keyboard power (3-pin KBPWR)

This jumper allows you to enable or disable the keyboard wake-up feature. Set this jumper to pins 2-3 (+5VSB) to wake up the computer when you press a key on the keyboard (the default is the Space Bar). This feature requires an ATX power supply that can supply at least 1A on the +5VSB lead, and a corresponding setting in the BIOS.

P5B-E

KBPWR

1

2

 

2

3

 

 

 

 

 

+5V +5VSB (Default)

P5B-E Keyboard power setting

2-22

Chapter 2: Hardware information