MiTAC 7521 PLUS/N - Manual (Page 42)

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7521 7521 Plus / N N/B MAINTENANCE Plus / N N/B MAINTENANCE
Cover Switch
System automatically provides power saving on monitoring Cover Switch. It will save battery power and prolong the usage
time when user closes the notebook cover unintentionally but the system still in power on mode. There are two functions to
be chosen.
1. Switch to CRT
2. Panel Off
3. Suspend to DRAM or Suspend to Disk by CMOS setup
Battery Warning State
7521 plus system provides battery management function and gives warning while battery is in its low power state. When the
battery capacity is below 10% (Battery Warning State), system will generate beep for every 2 seconds. When hearing the
beeping, it is recommended that user should plug in AC adapter to get power from external source, or stop working and save
his data file to prevent disaster results.
Battery Low State
After Battery Warning State, and battery capacity is below 4%, system will generate beep for twice second.
Battery Dead State
When the battery voltage level reaches 9 volts, system will shut down automatically in order to extend the battery packs' life.
Fan power on/off management
FAN is controlled by H8 embedded controller which using LM45 to sense CPU temperature and PWM to control fan speed.