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Chapter 3
SD7-533 Motherboard
3-26
Rev. 1.0 book section 9.3.2 for more details on BIOS initialization.
From the software point of view, this state is functionally the same as the S2 state. The operational
difference can be that some Power Resources that could be left ON in the S2 state might not be available
to the S3 state. As such, additional devices can be required to be in logically lower D0, D1, D2, or D3
state for S3 than S2. Similarly, some device wake events can function in S2 but not S3.
Because the processor context can be lost while in the S3 state, the transition to the S3 state requires that
the operating software flush all dirty cache to DRAM.
,
Above information for system S1 were refer to ACPI Specification Rev. 1.0.
Modem Use IRQ:
Eight items available: NA ) 3 ) 4 ) 5 ) 7 ) 9 ) 10 ) 11 ) Back to NA. The default setting is
NA. You can specify the IRQ for modem use.
HDD Off After:
Sixteen options are available: Disable ) 1 Min ) 2 Min ) 3 Min ) 4 Min ) 5 Min ) 6 Min ) 7
Min ) 8 Min ) 9 Min ) 10 Min ) 11 Min ) 12 Min ) 13 Min ) 14 Min ) 15 Min. The default
setting is Disable.
Power Button Override:
Two items available: Instant Off ) Delay 4 Sec. The default setting is Instant Off. It is activated when
the user presses the power button for more than four seconds while the system is in the working state,
then the system will transition to soft-off (Power off by software). This is called the power button
over-ride.
Power State Resume Control:
This setting lets you set the system action after a power failure. Three options are available: Always Off
) Always On ) Keep Pre-State. The default setting is Always Off. This item lets you sett the system
power state when power recovers. If you set it to Always Off, when power returns, whatever state your
computer was in before the power failure, the system will always turn off. If you set it to Always On,
when power returns, whatever state your computer was in before the power failure, the system will
always turn on. If you set it to Keep Pre-State, when the power returns, the computer return to the
previous power state.