Intel Desktop Board D810EMO/MO810E Technical Product Specification

1.13.1.1System 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 8 lists the power states supported by the board along with the associated system power targets. See the ACPI specification for a complete description of the various system and power states.

Table 8. 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.

Sleeping States

CPU States

Device States

Targeted System Power*

S0 – working

C0 – working

D0 – working

Full power > 30 W

 

 

state

 

S1 – CPU stopped

C1 – stop

D1, D2, D3 –

5 W < power < 30 W

 

grant

device

 

 

 

specification

 

 

 

specific.

 

S3 – Suspend-to-

No power

D3 – no power

Power < 5 W **

RAM. Context

 

except for wake

 

saved to RAM.

 

up logic.

 

S5 – Soft off.

No power

D3 – no power

Power < 5 W **

Context not saved.

 

except for wake

 

Cold boot is

 

up logic.

 

required.

 

 

 

No power to the

No power

D3 – no power for

No power to the system so

system.

 

wake up logic,

that service can be

 

 

except when

performed.

 

 

provided by

 

 

 

battery or external

 

 

 

source.

 

 

 

 

 

*Total system power is dependent on the system configuration, including add-in boards and peripherals powered by the system chassis’ power supply.

**Dependent on the standby power consumption of wake up devices used in the system.

28