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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
2. The total current consumed must NOT exceed the power supply
P4B533-M
P4B533-M USB Device Wake Up
2-18
on the +5VSB lead when these jumpers are set to +5VSB.
Otherwise, the system does not power up.
capability (+5VSB) whether under normal condition or in sleep
mode.
®
USBPWR_34
3
2
2
1
+5VSB
+5V
(Default)
USBPWR_12
USBPWR_56
1
2
2
3
+5V
+5VSB
(Default)
Chapter 2: Hardware information
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