User Guide

Datasheet, Volume 1 of 2 63
Power Management
4.1 Advanced Configuration and Power Interface
(ACPI) States Supported
This section describes the ACPI states supported by the processor.
Figure 4-2. Processor Package and IA Core C-States
OneormorecoresorGTexecutinginstructions
AllcoresinC3ordeeperandandProcessorGraphicsinRC6,LLCmaybeflushedandturnedoff,memoryinself
refresh,Uncoreclocksstopped(expectDisplay),mostUncorevoltagesreduced.
AllcoresandProcessorGraphicsinC6ordeeper,LLCis
flushedandturnedoff,memoryinselfrefresh,
allUncoreclocksstopped,mostUncorevoltagesreduced
PackageC6+LLCmaybeflushed
PackageC7+LLCmustbeflushedatonce,Displayenginestillstayson
PackageC8+MostVRsreducedto0V.VCCIOandVCCSTstayson+Display
PSR/OFF
Allcoreclocksarestopped,corestatesavedandvoltagereduceto0V
CoresflushL1/L2intoLLC,allcoreclocksarestopped
Corehalted,mostcoreclocksstoppedandvoltagereducedtoPn
Corehalted,mostcoreclocksstopped
Coreisexecutingcode
C0 C1 C1E C3 C6 C7 C8
C0
C2
C3
C6
C7
C8
PACKAGESTATE
CORESTATE
CorebehavesthesameasCoreC6state
Possiblecombinationofcore/packagestates
Impossiblecombinationofcore/ packagestates
Note: The“corestate”relatestothecorewhichisintheHIGHESTpowerstateinthepackage(mostactive)
(Internalstate)AllcoresinC3ordeeperandProcessorGraphicsinRC6,butconstraintspreventingC3ordeeper,
ormemoryaccessreceived
Table 4-1. System States
State Description
G0/S0 Full On
G1/S3-Cold Suspend-to-RAM (STR). Context saved to memory (S3-Hot is not supported by the
processor).
G1/S4 Suspend-to-Disk (STD). All power lost (except wake-up on PCH).
G2/S5 Soft off. All power lost (except wake-up on PCH). Total reboot.
G3 Mechanical off. All power removed from system.