Power Management Function ( Acpi Support Function) - Acer Aspire L100 Service Manual

Power Management Function ( ACPI support function)

Device Standby Mode
Independent power management timer for hard disk drive devices
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(0-15 minutes, time step=1 minute).
Hard disk drive goes into Standby mode (for ATA standard interface).
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Disable V-sync to control the VESA DPMS monitor.
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Resume method: device activated (Keyboard for DOS, keyboard & mouse for Windows).
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Resume recovery time: 3-5 sec.
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Global Standby Mode
Global power management timer (2-120 minutes, time step=10 minute).
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Hard disk drive goes into Standby mode (for ATA standard interface).
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Disable H-sync and V-sync signals to control the VESA DPMS monitor.
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Resume method: Return to original state by pushing external switch button, modem ring in,
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keyboard and mouse for APM mode.
Resume recovery time: 7-10 sec.
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Suspend Mode
Independent power management timer (2-120 minutes, time step=10 minutes) or pushing external
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switch button.
CPU goes into SMM.
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CPU asserts STPCLK# and goes into the Stop Grant State.
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LED on the panel turns amber colour.
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Hard disk drive goes into SLEEP mode (for ATA standard interface).
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Disable H-sync and V-sync signals to control the VESA DPMS monitor.
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Ultra I/O and VGA chip go into power saving mode.
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Resume method: Return to original state by pushing external switch button, modem ring in,
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keyboard and mouse for APM mode.
Return to original state by pushing external switch button, modem ring in and USB keyboard for
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ACPI mode.
ACPI
ACPI specification 1.0b.
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S0, S1, S3 and S5 sleep state support.
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On board device power management support.
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On board device configuration support.
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Chapter 1 17