Intel N2820 FH8065301616603 Data Sheet
Product codes
FH8065301616603
Datasheet
61
Power Management
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 – C7)
•
Processor 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.
•
Memory is held in self-refresh and the memory interface is disabled, except the
CKE pin as it is powered from the memory voltage rail. CKE is driven low.
CKE pin as it is powered from the memory voltage rail. CKE is driven low.