Intel 2955U CL8064701523900 Data Sheet

One or more cores or GT executing instructions

All cores and GT in C3 or deeper, L3 may be flushed and turned off, memory in self refresh, some Uncore 
clocks stopped, some Uncore voltages reduced
All cores and GT in C6 or deeper, L3 may be flushed and turned off, memory in self refresh, all Uncore 
clocks stopped, some Uncore voltages reduced

Package C6 + L3 flushed and turned off, additional Uncore voltages reduced

Package C7 + most Uncore voltages reduced to 0V

Package C8 + VR12.6 in low power state

Package C9 + VR12.6 turned off

All core clocks are stopped, core state saved and voltage reduce to 0V

Cores flush L1/L2 into L3, 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

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)

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This section describes the ACPI states supported by the processor.

G0/S0

Full On Mode, Display On.

G0/S0

Connected Standby Mode, Display Off.

G1/S3-Cold

Suspend-to-RAM (STR). Context saved to memory (S3-Hot state 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 removed from system.

C0

Active mode, processor executing code.

C1

AutoHALT state.

C1E

AutoHALT state with lowest frequency and voltage operating point.

C3

Execution cores in C3 state flush their L1 instruction cache, L1 data cache, and L2 cache

to the L3 shared cache. Clocks are shut off to each core.

C6

Execution cores in this state save their architectural state before removing core voltage.

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

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