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Vig390s Motherboard Manual V1.0
27
System States and Power States
Under ACPI, the operating system directs all system and device power state
transitions. The operating system puts devices in and out of low-power states based
on user preferences and knowledge of how devices are being used by applications.
Devices that are not being used can be turned off. The operating system uses
information from applications and user settings to put the system as a whole into a
low-power state.
Table 10 lists the power states supported by the VIG390S motherboard along with
the associated system power targets. See the ACPI specification for a complete
description of the various system and power states.
Table 10: Power States and Targeted System Power
Global States Sleeping States Processor
States
Device States Targeted System
Power
G0 – working
state
S0 – working C0 – working D0 – working state Full Power > 30W
G1 – sleeping
state
S1 – Processor
stopped
C1 – stop grant D1, D2, D3 – device
specification specific
5W < power <
52.5W
G1 – sleeping
state
S3 – Suspend to
RAM.
No power D3 – no power except
for wake-up logic
Power < 5W
G1 – Sleeping
state
S4 – Suspended
to disk.
No power D3 – no power except
for wake-up logic
Power < 5W
G2/S5 S5 – Soft off.
saved
No power D3 – no power except
for wake-up logic
Power < 5W
G3 –
Mechanical off
AC power is
disconnected
for the
computer
No power to the
system
No power D3 – no power for
wake-up logic, except
when provided by
battery or external
source
No power to the
system. Service
can be performed
safely.
Wake-up Devices and Events
Table 11 lists the devices or specific events that can wake the computer from
specific states.
Table 11: Wake-up Devices and Events
These devices/events can wake up the computer… …from this state
LAN S1, S3, S4, S5
Modem (Back panel Serial Port A) S1, S3
PME# signal S1, S3, S4, S5
Power switch S1, S3, S4, S5
PS/2 devices S1, S3
RTC alarm S1, S3, S4, S5
USB S1, S3
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.