Product Description
29
1.11.1.2
Wake-up Devices and Events
Table 8 lists the devices or specific events that can wake the computer from specific
states.
Table 8. Wake-up Devices and Events
These devices/events can wake up the computer…
…from this state
LAN
S1, S3, S4, S5
(Note 1)
PME# signal
S1, S3, S4, S5
(Note 1)
Wake# signal
S1, S3, S4, S5
(Notes 1 and 3)
Power switch
S1, S3, S4, S5
(Note 1)
RTC alarm
S4, S5
(Note 1)
Serial port
S1, S3
USB
S1, S3
(Note 2)
PS/2 devices
S1, S3, S4, S5
(Notes 1 and 4)
Notes:
1.
S4 implies operating system support only. Wake from S5 must include wake after loss of power.
2.
USB ports are turned off during S4/S5 states.
3.
Wake# signal must be controllable by the BIOS (enable/disable option).
4.
PS/2 wake from S5 should have 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.
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