Intel CW8064701487007 Datasheet download pdf (Page 52)

Power Management

52 Datasheet, Volume 1

4.1 Advanced Configuration and Power Interface

(ACPI) States Supported

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

4.1.1 System States

4.1.2 Processor Core / Package Idle States

4.1.3 Integrated Memory Controller States

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 wakeup on PCH).

G2/S5 Soft off. All power lost (except wakeup on PCH). Total reboot.

G3 Mechanical off. All power (AC and battery) removed from system.

Table 4-2. Processor Core / Package State Support

State Description

C0 Active mode, processor executing code

C1 AutoHALT state

C1E 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

Execution cores in this state behave similarly to the C6 state. If all execution cores

request C7, L3 cache ways are flushed until it is cleared.

Table 4-3. Integrated Memory Controller States

State Description

Power up CKE asserted. Active mode.

Pre-charge Power Down CKE de-asserted (not self-refresh) with all banks closed

Active Power Down CKE de-asserted (not self-refresh) with minimum one bank active

Self-Refresh CKE de-asserted using device self-refresh

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Intel CW8064701487007 Datasheet Page 52