Acer Aspire T100, Service Manual

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Chapter 1 21
Power Management Function (ACPI support function)
Device Standby Mode
!
Independent power management timer for hard disk drive devices
(0-15 minutes, time step=1 minute).
!
Hard disk drive goes into Standby mode (for ATA standard interface).
!
Disable V-sync to control the VESA DPMS monitor.
!
Resume method: device activated (Keyboard for DOS, keyboard & mouse for Windows).
!
Resume recovery time: 3-5 sec.
Global Standby Mode
!
Global power management timer (2-120 minutes, time step=10 minute).
!
Hard disk drive goes into Standby mode (for ATA standard interface).
!
Disable H-sync and V-sync signals to control the VESA DPMS monitor.
!
Resume method: Return to original state by pushing external switch button, modem ring in,
keyboard and mouse for APM mode.
!
Resume recovery time: 7-10 sec.
Suspend Mode
!
Independent power management timer (2-120 minutes, time step=10 minutes) or pushing external
switch button.
!
CPU goes into SMM.
!
CPU asserts STPCLK# and goes into the Stop Grant State.
!
LED on the panel turns amber colour.
!
Hard disk drive goes into SLEEP mode (for ATA standard interface).
!
Disable H-sync and V-sync signals to control the VESA DPMS monitor.
!
Ultra I/O and VGA chip go into power saving mode.
!
Resume method: Return to original state by pushing external switch button, modem ring in,
keyboard and mouse for APM mode.
!
Return to original state by pushing external switch button, modem ring in and USB keyboard for
ACPI mode.
ACPI
!
ACPI specification 1.0.
!
S0, S1, S3 and S5 sleep state support.
!
On board device power management support.
!
On board device configuration support.