Intel 2955U CL8064701523900 Data Sheet

Product codes

CL8064701523900

Table 17.

Coordination of Core Power States at the Package Level

Package C-State

Core 1

C10

Core 0

C10

C10

Note: 1. If enabled, the package C-state will be C1E if all cores have resolved a core C1 state or higher.

Figure 11.

Package C-State Entry and Exit

Package C0

Package C7

Package C6

Package C3

Package C9

Package C8

Package C10

Package C1/C1E

Package C0 State

This is the normal operating state for the processor. The processor remains in the

normal state when at least one of its cores is in the C0 or C1 state or when the

platform has not granted permission to the processor to go into a low-power state.

Individual cores may be in lower power idle states while the package is in C0 state.

Package C1/C1E State

No additional power reduction actions are taken in the package C1 state. However, if

the C1E sub-state is enabled, the processor automatically transitions to the lowest

supported core clock frequency, followed by a reduction in voltage.

The package enters the C1 low-power state when:
•

At least one core is in the C1 state.

•

The other cores are in a C1 or deeper power state.

The package enters the C1E state when:
•

All cores have directly requested C1E using MWAIT(C1) with a C1E sub-state hint.

Power Management—Processors

Mobile 4th Generation Intel

Core

™

Processor Family, Mobile Intel

Pentium

Processor Family, and Mobile Intel

Celeron

Processor Family

July 2014

Datasheet – Volume 1 of 2

Order No.: 329001-007