Power States And Targeted System Power - Intel YA810E Technical Product Specification

1.12.1.1 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 9 lists the power states supported by the YA810E board along with the associated system
power targets. See the ACPI specification for a complete description of the various system and
power states.
Table 9.

Power States and Targeted System Power

Global States
G0 - working state
G1 - sleeping state
G1 - sleeping state
G2/S5
G3 - mechanical off.
(AC power is
disconnected from
the computer.)
* Total system power is dependent on the system configuration, including peripherals powered by the system chassis'
power supply.
** Dependent on the standby power consumption of wake-up devices used in the system.
Sleeping States CPU States
S0 - working C0 - working
S1 - CPU stopped C1 - stop grant
S3 - Suspend-to- No power
RAM. Context
saved to RAM.
S5 - Soft off. No power
Context not
saved. Cold boot
is required.
No power to the No power
system.
Product Description
Device States Targeted System Power*
D0 - working Full power > 30 W
state
D1, D2, D3 - 5 W < power < 30 W
device
specification
specific.
D3 - no power Power < 5 W **
except for
wake up logic.
D3 - no power Power < 5 W **
except for
wake up logic.
D3 - no power No power to the system
for wake up so that service can be
logic, except performed.
when provided
by battery or
external
source.
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