Power Management Functions - Acer Veriton 3500G Service Manual

Power Management Functions

Device Standby Mode
Independent power management timer for hard disk drive devices (0-15 minutes, time step=1
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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 minutes).
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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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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 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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Return to original state by pushing external switch button.
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S1, S3, S4
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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 continues.
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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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34 Veriton 3500/5500/7500