Technical information

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