User manual

Product Description
37
1.12.2 Hardware Support
The board provides several power management hardware features, including:
• Wake from Power Button signal
• Instantly Available PC technology
• LAN wake capabilities
• Wake from USB (not after G3)
• WAKE# signal wake-up support
• Wake from S5
• Wake from CIR
• +5 V Standby Power Indicator LED
NOTE
The use of Wake from USB from an ACPI state requires an operating system that provides full ACPI
support.
1.12.2.1 Power Input
When resuming from an AC power failure, the computer returns to the power state it was in
before power was interrupted (on or off). The computer’s response can be set using the Last
Power State feature in the BIOS Setup program’s Boot menu.
1.12.2.2 Instantly Available PC Technology
Instantly Available PC technology enables the board to enter the ACPI S3 (Suspend-to-RAM)
sleep-state. While in the S3 sleep-state, the computer will appear to be off (the power supply is
only supplying Standby power, and the front panel LED will be amber or secondary color if dual
colored, or off if single colored.) When signaled by a wake-up device or event, the system quickly
returns to its last known wake state. Table 11 on page 36 lists the devices and events that can
wake the computer from the S3 state.
The use of Instantly Available PC technology requires operating system support and drivers for
any installed M.2 add-in card.
1.12.2.3 LAN Wake Capabilities
LAN wake capabilities enable remote wake-up of the computer through a network. The LAN
subsystem monitors network traffic at the Media Independent Interface. Upon detecting a Magic
Packet* frame, the LAN subsystem asserts a wake-up signal that powers up the computer.
1.12.2.4 Wake from USB
USB bus activity wakes the computer from an ACPI S3 state (not after G3).
NOTE
Wake from USB requires the use of a USB peripheral that supports Wake from USB.