82801CA Datasheet, PDF (134/521 Pages) Intel Corporation – I/O Controller Hub 3-S (ICH3-S)

Functional Description
Figure 5-13. Signal Strapping
Processor
A20M#, IGNNE#,
INTR, NMI
CPURST#
INIT#
Host Controller
Intel^® ICH3
P C IR S T #
4x 2 to 1
Mux
Frequency
Strap Register
PW ROK
5.12
5.12.1
Power Management (D31:F0)
Features
• ACPI Power and Thermal Management Support
— 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
• PCI PME# Signal for Wake Up from Low-Power states
• System Clock Control
— ACPI C2 state: Stop-Grant state (using STPCLK# signal) halts processor’s instruction
stream
• System Sleeping State Control
— ACPI S1 state: Like C2 state (only STPCLK# active, and SLP# optional)
— 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
• Streamlined Legacy Power Management Support for APM-Based Systems
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Intel^® 82801CA ICH3-S Datasheet