Intel E3845 FH8065301487715 Data Sheet
Product codes
FH8065301487715
Power Management
Intel
®
Atom™ Processor E3800 Product Family
Datasheet
83
6
Power Management
This chapter provides information on the following power management topics:
•
ACPI States
•
Processor Core
•
PCI Express
•
Integrated Graphics Controller
6.1
Power Management Features
•
ACPI System States support (S0, S3, S4, S5)
•
Processor Core/Package States support (C0 – C6)
•
SoC Graphics Adapter States support D0 – D3.
•
Support Link Power Management (LPM)
•
Thermal throttling
•
Dynamic I/O power reductions (disabling sense amps on input buffers, tri-stating
output buffers)
output buffers)
•
Active power down of Display links
6.2
Power Management States Supported
The Power Management states supported by the processor are described in this
section.
section.
6.2.1
S-State Definition
6.2.1.1
S0 - Full On
This is the normal operating state of the processor. In S0, the core processor will
transition in and out of the various processor C-States and P-States.
transition in and out of the various processor C-States and P-States.
6.2.1.2
S3 - Suspend to RAM (Standby)
S3 is a suspend state in which the core power planes of the processor are turned off
and the suspend wells remain powered.
and the suspend wells remain powered.
•
All power wells are disabled, except for the suspend and RTC wells.
•
The core processor’s macro-state is saved in memory.