Datasheet

Datasheet 13
Low Power Features
NOTES:
1. AutoHALT or MWAIT/C1.
2.1.1 Core Low Power State Descriptions
2.1.1.1 Core C0 State
This is the normal operating state for cores in the processor.
2.1.1.2 Core C1/AutoHALT Powerdown State
C1/AutoHALT is a low power state entered when a core executes the HALT instruction.
The processor transitions to the C0 state upon occurrence of SMI#, INIT#, LINT[1:0]
(NMI, INTR), or FSB interrupt messages. RESET# causes the processor to immediately
initialize itself.
Figure 2. Package Low Power States
Table 1. Coordination of Core Low Power States at the Package Level
Package State Core1 State
Core0 State C0 C1
1
C2 C3 C4
C0 Normal Normal Normal Normal Normal
C1
1
Normal Normal Normal Normal Normal
C2 Normal Normal Stop-Grant Stop Grant Stop Grant
C3 Normal Normal Stop-Grant Deep Sleep Deep Sleep
C4 Normal Normal Stop-Grant Deep Sleep
Deeper Sleep
/ Intel®
Enhanced
Deeper Sleep
Stop
Grant
Snoop
Normal
Stop
Grant
Deep
Sleep
STPCLK# asserted
Snoop
serviced
Snoop
occurs
Deeper
Sleep
†
Sleep
SLP# asserted
SLP# deasserted
DPSLP# asserted
DPSLP# deasserted DPRSTP# deasserted
DPRSTP# asserted
STPCLK# deasserted
† — Deeper Sleep includes the Deeper Sleep state and Intel Enhanced Deeper Sleep state.