Product Description
37
Newer energy-efficient power supplies using less than 0.5 W (in Standby mode) may
also be needed to achieve this goal.
1.10.1.3
Wake-up Devices and Events
Table 9 lists the devices or specific events that can wake the computer from specific
states.
Table 9. Wake-up Devices and Events
These devices/events can wake up the computer…
…from this state
LAN
S3, S4, S5
(Note)
PME# signal
S3, S4, S5
(Note)
Power switch
S3, S4, S5
PS/2 devices
S3
RTC alarm
S3, S4, S5
Serial port
S3
USB
S3
WAKE# signal
S3, S4, S5
Note: For LAN and PME# signal, S5 is disabled by default in the BIOS Setup program. Setting this option to
Power On will enable a wake-up event from LAN in the S5 state.
NOTE
The use of these wake-up 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.
1.10.2
Hardware Support
CAUTION
Ensure that the power supply provides ad5 V standby current if LAN wake
capabilities and Instantly Available PC technology features are used. Failure to do so
can damage the power supply. The total amount of standby current required depends
on the wake devices supported and manufacturing options.
The board provides several power management hardware features, including:
•
Power connector
•
Fan headers
•
LAN wake capabilities
•
Instantly Available PC technology
•
Resume on Ring
•
Wake from USB
•
Wake from PS/2 keyboard
•
PME# signal wake-up support
•
WAKE# signal wake-up support