2.Keyboard power (3-pin KBPWR)

This jumper allows you to enable or disable the keyboard wake-up feature. When you set this jumper to pins 2–3 (+5VSB), you can wake up the computer by pressing 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.

KBPWR

1

2

2

3

 

 

 

 

 

+5V +5VSB (Default)

P7P55-M

P7P55-M Keyboard Power Setting3.USB device wake-up (3-pin USBPW1-8, 3-pin USBPW9-14)

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

USBPW1-8

1 22 3

+5V +5VSB (Default)

USBPW9-14

P7P55-M

1

2

2

3

+5V +5VSB (Default)

P7P55-M USB Device Wake Up

• 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 would not power up.

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

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Chapter 1: Product introduction