Chapter 1
11
Power Management Function(ACPI support function)
Device Standby Mode
•
Independent power management timer for hard disk drive devices(0-15 minutes,time step=1minute).
•
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 3-5sec
Global Standby Mode
•
Global power management timer(2-120minutes,time step=10minute).
•
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: Resume to original state by pushing external switch Button,modem ring in,keyboard
an mouse for APM mode.
•
Resume recovery time :7-10sec
Suspend Mode
•
Independent power management timer(2-120minutes,time step=10minute)or pushing extern switch
button.
•
CPU goes into SMM
•
CPU asserts STPCLK# and goes into the Stop Grant State.
•
LED on 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: Resume to original state by pushing external switch Button,modem ring in,keyboard
an 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 1.0b
•
S0,S1,S2 and S5 sleep state support.
•
On board device power management support.
•
On board device configuration support.
