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