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Chapter 1: Product introduction
3. USB device wake-up (USBPW12, USBPW5-8)
Set this jumper 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).
B75M-A
B75M-A USB device wake up
21
2 3
+5V
(Default)
+5VSB
USBPW5-8
21
2 3
+5V
(Default)
+5VSB
USBPW12
• 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.