Functional Description
5.13
Power Management (D31:F0)
5.13.1
Features
• Support for Advanced Configuration and Power Interface, Version 3.0a (ACPI)
providing power and thermal management
— ACPI 24-Bit Timer
— Software initiated throttling of processor performance for Thermal and Power
Reduction
— Hardware Override to throttle processor performance if system too hot
— SCI and SMI# Generation
— ACPI C2 state Stop-Grant state (using STPCLK# signal) halts processor’s
instruction stream
• PCI PME# signal for Wake Up from Low-Power states
• System Clock Control
— ACPI C3 State: Ability to halt processor clock (but not memory clock)
— ACPI C4 State: Ability to lower processor voltage.
• System Sleep State Control
— ACPI S1 state: Stop Grant (using STPCLK# signal) halts processor’s instruction
stream (only STPCLK# active)
— ACPI S3 state — Suspend to RAM (STR)
— ACPI S4 state — Suspend-to-Disk (STD)
— ACPI G2/S5 state — Soft Off (SOFF)
— Power Failure Detection and Recovery
• Intel Management Engine Power Management Support
— New Wake events from the Intel Management Engine (enabled from all S-
States including Catastrophic S5 conditions)
• Streamlined Legacy Power Management for APM-Based Systems
®
5.13.2
Intel ICH10 and System Power States
Table 5-25 shows the power states defined for ICH10-based platforms. The state
names generally match the corresponding ACPI states.
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Datasheet
INTEL [ INTEL ]
