User`s guide

Power Saving Modes Chapter Five - Power Management
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APM Interface
In addition to the power saving features built into the resident BIOS System
Configuration Utility, your TREK 2 computer also supports the Advanced
Configuration and Power Interface (ACPI), an industry specification authored by
Microsoft, Intel and Toshiba to enable demand-based power consumption. It
allows for collection of power consumption information from the entire computer
and gives complete device activity control to the Operating System, enabling it to
provide power to only those devices that need it - when they need it. The functions
of ACPI can:
•
Lower processor clock speed when it determines that running applications
do not need the CPU to run at full speed
•
Control motherboard and peripheral device power consumption by turning
on devices only when needed
•
Regulate applications’ activity through a continually updated demand
analysis of running software
•
Calculate and provide accurate battery life readings through use of the
Smart Battery System
•
Change its power management policies depending on battery life
With ACPI constantly monitoring all system activity, accounting for the TREK 2’s
power consumption, and controlling all power-saving features, you will realize
significant additional power savings.
System Suspend (Suspend to
Disk or Suspend to RAM
Transits automatically after
specified time out
Press the power button
Hard Disk Spin Down Transits automatically Access HDD
Power Mode Entering Mode Reactivating
TABLE 8. Power Management Summary