MiTAC 7521 PLUS/N Summary of Device Power Sates, System States Working S0, Sleeping State S3

7521Plus / N N/B MAINTENANCE

Summary of Device Power Sates

Device State		Power Consumption	Device Context Retained	Driver Restoration
D0	– Fully On	As needed for operation	All	None
D1		D0>D1>D2>D3	>D2	<D2
D2		D0>D1>D2>D3	<D1	>D1
D3	– Off	0	None	Full init and load

System States

1. Working (S0)

System is fully usable. User can enter working state from S4 or S5 by pressing the power button or wake up from sleeping state.

2.Sleeping State (S3)

The S3 sleeping state is a low wake-up latency sleeping state where all system context is lost except system memory. CPU, cache, and chip set context is lost in this state.

This state is attained by:

•Set “ Low Battery Alarm Actions ” to “ Standby ”, when the battery discharge to a critical level, unit will enter this state.

•If sets optional action of “ cover switch ”, “ power button ”, “ sleep button ” to “ Standby ”, and presses these buttons, or sets “ System standby ” timeout.

•Set “ System standby ” in “ Power Schemes ” for system inactivity time out.

•Putting the PC into standby through the Operating System by clicking Start, Shut Down then select Standby item.

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