NH82801HEM S LA5R Intel, NH82801HEM S LA5R Datasheet - Page 160
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NH82801HEM S LA5R
Manufacturer Part Number
NH82801HEM S LA5R
Description
Manufacturer
Intel
Datasheet
1.NH82801HEM_S_LA5R.pdf
(890 pages)
Specifications of NH82801HEM S LA5R
Lead Free Status / RoHS Status
Compliant
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5.13.2
Table 62.
160
Intel
Table 62
generally match the corresponding ACPI states.
General Power States for Systems Using Intel
Table 63
among the various states may appear to temporarily transition through intermediate
states. For example, in going from S0 to S1, it may appear to pass through the G0/S0/
C2 states. These intermediate transitions and states are not listed in the table.
Substates
G0/S0/C0
G0/S0/C1
G0/S0/C2
G0/S0/C3
G0/S0/C4
State/
(Mobile
(Mobile
(Mobile
G1/S1
G1/S3
G1/S4
G2/S5
Only)
Only)
Only)
G3
®
shows the power states defined for ICH8-based platforms. The state names
shows the transitions rules among the various states. Note that transitions
ICH8 and System Power States
Full On: Processor operating. Individual devices may be shut down to save
power. The different processor operating levels are defined by Cx states, as
shown in
processor using the STPCLK# signal to reduce power consumption. The throttling
can be initiated by software or by the operating system or BIOS.
Auto-Halt: Processor has executed an AutoHalt instruction and is not executing
code. The processor snoops the bus and maintains cache coherency.
Stop-Grant: The STPCLK# signal goes active to the processor. The processor
performs a Stop-Grant cycle, halts its instruction stream, and remains in that
state until the STPCLK# signal goes inactive. In the Stop-Grant state, the
processor snoops the bus and maintains cache coherency.
Stop-Clock: The STPCLK# signal goes active to the processor. The processor
performs a Stop-Grant cycle, halts its instruction stream. ICH8 then asserts
DPSLP# followed by STP_CPU#, which forces the clock generator to stop the
processor clock. This is also used for Intel SpeedStep
Accesses to memory (by graphics, PCI, or internal units) is not permitted while in
a C3 state.
Stop-Clock with Lower Processor Voltage: This closely resembles the G0/
S0/C3 state. However, after the ICH8 has asserted STP_CPU#, it then lowers the
voltage to the processor. This reduces the leakage on the processor. Prior to
exiting the C4 state, the ICH8 increases the voltage to the processor.
Stop-Grant: Similar to G0/S0/C2 state. ICH8 also has the option to assert the
CPUSLP# signal to further reduce processor power consumption.
NOTE: The behavior for this state is slightly different when supporting iA64
Suspend-To-RAM (STR): The system context is maintained in system DRAM,
but power is shut off to non-critical circuits. Memory is retained, and refreshes
continue. All clocks stop except RTC clock.
Suspend-To-Disk (STD): The context of the system is maintained on the disk.
All power is then shut off to the system except for the logic required to resume.
Soft Off (SOFF): System context is not maintained. All power is shut off except
for the logic required to restart. A full boot is required when waking.
Mechanical OFF (MOFF): System context not maintained. All power is shut off
except for the RTC. No “Wake” events are possible, because the system does not
have any power. This state occurs if the user removes the batteries, turns off a
mechanical switch, or if the system power supply is at a level that is insufficient
to power the “waking” logic. When system power returns, transition will depends
on the state just prior to the entry to G3 and the AFTERG3 bit in the
GEN_PMCON3 register (D31:F0, offset A4). Refer to
processors.
Table
63. Within the C0 state, the Intel
Legacy Name / Description
®
ICH8
®
ICH8 can throttle the
Table 70
®
technology support.
Intel
®
Functional Description
for more details.
ICH8 Family Datasheet
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