Power Management Function (Acpi Support Function) - Acer Veriton FP2 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 power switch button, KB and Mouse at APM
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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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System and LCD monitor's Power LED are change from green to orange color.
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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, K/B and mouse, Wake
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on Lan PME event.
Suspend to RAM
The system context is maintained in system memory
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Power is shut to non-critical circuits.
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Memory is retained, and refreshes continually.
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All clocks shut except RTC.
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Return to original state by pushing external switch button & "PME" events at ACPI mode.
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20 Chapter 1