User Manual

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2.14.1.2 Wake-up Devices and Events
Table 5 lists the devices or specific events that can wake the computer from specific states.
Table 5. Wake-up Devices and Events
Devices/events that wake up the
system…
…from this sleep
state
Comments
Power switch
S3, S4, S5
1
RTC alarm
S3, S4, S5
1
Monitor to remain in sleep state
LAN
S3, S4, S5
1, 3
“S5 WOL after G3” must be supported;
monitor to remain in sleep state
WIFI
S3, S4, S5
1, 3
Monitor to remain in sleep state
Bluetooth
S3
1
, S4
USB
S3, S4, S5
1, 2, 3
Wake S4, S5 controlled by BIOS option
(not after G3)
PCIE
S3, S4
Via WAKE; monitor to remain in sleep
state
HDMI CEC
S3, S4, S5
1
Emulates power button push
Notes:
1. S4 implies operating system support only.
2. Will not wake from Deep S4/S5. USB S4/S5 Power is controlled by BIOS. USB S5 wake is controlled by BIOS. USB S4
wake is controlled by OS driver, not just BIOS option.
3. Windows Fast startup will block wake from LAN and USB from S5.
NOTE
The use of these wake events from an ACPI state requires an operating system that provides full
ACPI support. In addition, software, drivers, and peripherals must fully support ACPI wake events.
2.14.2 Hardware Support
The board provides several power management hardware features, including:
• Wake from Power Button signal
When resuming from an AC power failure, the computer returns to the power state
defined in the BIOS. Available states are “Power On”, “Stay Off”, and “Last State”.
• LAN wake capabilities
Enables 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.
• Wake from USB
USB bus activity wakes the computer from an ACPI S3 state (not after G3).
NOTE
The use of Wake from USB from an ACPI state requires an operating system that provides full
ACPI support. Wake from USB requires the use of a USB peripheral that supports Wake from USB.