Intel Desktop Board DB75EN Technical Product Specification
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1.12.1.2 Wake-up Devices and Events
Table 10 lists the devices or specific events that can wake the computer from specific
states.
Table 10. Wake-up Devices and Events
These devices/events can wake up the computer… …from this state
Power switch
S3, S4, S5
(
RTC alarm
S3, S4, S5
LAN
S3, S4, S5
USB S3
PME# signal
S3, S4, S5
WAKE#
S3, S4, S5
(Note 1)
Serial port S3
PS/2 devices
S3, S4, S5
Notes:
1. S4 implies operating system support only.
2. Wake from S4 and S5 is recommended by Microsoft.
3. PS/2 wake from S5 has a selection in the BIOS to enable wake from a combination key (Alt + Print
Screen) or the keyboard power button.
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.
1.12.2 Hardware Support
CAUTION
Ensure that the power supply provides adequate +5 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
• Wake from USB
• Power Management Event signal (PME#) wake-up support
• PCI Express WAKE# signal support
• Wake from PS/2 devices
• Wake from serial port
• Wake from S5
• +5 V Standby Power Indicator LED
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