Power Management; Acpi States Supported; System States; Processor Core/Package Idle States - Intel 2ND GENERATION CORE PROCESSOR FAMILY DESKTOP - DATASHEET VOLUME 1 01-2011 Datasheet

Power Management
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Power Management

This chapter provides information on the following power management topics:
• ACPI States
• Processor Core
• Integrated Memory Controller (IMC)
• PCI Express*
• Direct Media Interface (DMI)
• Processor Graphics Controller
4.1

ACPI States Supported

The ACPI states supported by the processor are described in this section.
4.1.1

System States

Table 4-1.

System States

State
G0/S0
G1/S3-Cold
G1/S4
G2/S5
G3
4.1.2

Processor Core/Package Idle States

Table 4-2.

Processor Core/Package State Support

State
C0
C1
C1E
C3
C6
Datasheet, Volume 1
Full On
Suspend-to-RAM (STR). Context saved to memory (S3-Hot is not supported by the processor).
Suspend-to-Disk (STD). All power lost (except wakeup on PCH).
Soft off. All power lost (except wakeup on PCH). Total reboot.
Mechanical off. All power removed from system.
Active mode, processor executing code.
AutoHALT state.
AutoHALT state with lowest frequency and voltage operating point.
Execution cores in C3 flush their L1 instruction cache, L1 data cache, and L2 cache to the L3
shared cache. Clocks are shut off to each core.
Execution cores in this state save their architectural state before removing core voltage.
Description
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