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Intel N475 AU80610006240AA User Manual

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AU80610006240AA
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Power Management
52
Datasheet
5
Power Management
This chapter provides information on power management capabilities of the processor:
•
ACPI States
•
Processor Core States
•
IGD (Integrated Graphics Devices) States
•
IMC (Integrated Memory Controller) States
•
DMI (Direct Media Interface) States
5.1
ACPI States Supported
The ACPI states supported by the processor are described in this section.
5.1.1
System States
5.1.2
Processor Idle States
Table 5-35.System States
State
Description
G0/S0
Full On
G1/S3-Cold
Suspend-to-RAM (STR). Context saved to memory.
G1/S4
Suspend-to-Disk (STD). All power lost (except wakeup on chipset)
G2/S5
Soft off. All power lost (except wakeup on chipset)
G3
Mechanical/hard off. All power (AC and battery) removed from system
Table 5-36.Processor Core/Package States Support
State
Description
C0
Active mode, processor executing code
C1
AutoHALT state
C2
Stop Clock. Clock to processor is still running. Clock stopped to processor core
C4
Deeper Sleep. Clock to processor stopped with reduced voltage on the processor
C1E, 
C2E, C4E
Extended C-states; C1/C2/C4 states work together with Enhanced Intel® 
SpeedStep Technology