Intel ULV 713 RJ80535UC0051M Fiche De Données
Codes de produits
RJ80535UC0051M
Intel
®
Pentium
®
M Processor Datasheet
11
Low Power Features
2
Low Power Features
2.1
Clock Control and Low Power States
The Intel Pentium M processor supports the AutoHALT, Stop-Grant, Sleep, Deep Sleep, and
Deeper Sleep states for optimal power management. See
Deeper Sleep states for optimal power management. See
for a visual representation of the
processor low-power states.
2.1.1
Normal State
This is the normal operating state for the processor.
2.1.2
AutoHALT Powerdown State
AutoHALT is a low-power state entered when the processor executes the HALT instruction. The
processor transitions to the Normal state upon the occurrence of SMI#, INIT#, LINT[1:0] (NMI,
INTR), or PSB interrupt message. RESET# will cause the processor to immediately initialize itself.
processor transitions to the Normal state upon the occurrence of SMI#, INIT#, LINT[1:0] (NMI,
INTR), or PSB interrupt message. RESET# will cause the processor to immediately initialize itself.
A System Management Interrupt (SMI) handler will return execution to either Normal state or the
AutoHALT Powerdown state. See the Intel Architecture Software Developer's Manual, Volume III:
System Programmer's Guide for more information.
AutoHALT Powerdown state. See the Intel Architecture Software Developer's Manual, Volume III:
System Programmer's Guide for more information.
The system can generate a STPCLK# while the processor is in the AutoHALT Powerdown state.
When the system deasserts the STPCLK# interrupt, the processor will return execution to the
HALT state.
When the system deasserts the STPCLK# interrupt, the processor will return execution to the
HALT state.
Figure 1. Clock Control States
snoop
occurs
Stop
Grant
Normal
Sleep
HALT/
Grant
Snoop
Auto Halt
Deep
Sleep
STPCLK# asserted
SLP# asserted
SLP# de-asserted
STPCLK# de-asserted
snoop
serviced
HLT
instruction
snoop
serviced
snoop
occurs
DPSLP#
de-asserted
DPSLP#
asserted
asserted
STPCLK#
asserted
STPCLK#
de-asserted
halt
break
V0001-04
core voltage raised
core voltage lowered
Halt break - A20M#, INIT#, INTR, NMI, PREQ#, RESET#, SMI#, or APIC interrupt
Deeper
Sleep