EC should support all the battery information to ACPI-OS
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Designed Battery capacity
−
Designed Voltage
−
Designed Low battery capacity
−
Designed Low
–
Low battery capacity
−
Latest Full charged capacity
−
Present Remaining capacity
−
Present drain rate
−
Present voltage
−
Present Battery Status
ACPI BIOS should support an independent device object in the name space, and
implement the following methods.
3.4.5 Thermal Control
There are primary cooling policies that the OS use to control the thermal state of the
hardware
Cooling Policy
Action
Temperature Setting
Action cooling
Fan On
Always On
Action cooling
Fan High On
Over 70 oC
Fan High Off
Below 65oC
Passive cooling
Throttling CPU On
Over 90 oC
Throttling CPU Off
Below 85oC
Critical trip point
System Shutdown
Over 110 oC
3.5
Battery Management
3.5.1 Battery Sub-system
§
The charger will stop charge the battery when the following condition is detected.
- The temperature of the system is too high
- The remaining capacity is 95% and more.
Note that the battery life is depending on different configuration running. E.g. with
CD-ROM battery life is shorter, document keyin only battery life is longer, PMU
disable battery life is short, PMU enable battery life is longer.
- Battery reading methodology is through PMU08 SMBus.
3.5.2 Battery Low
When the battery voltage is approaching to the Low level, the PMU08 will generate a
battery low SMI. The system will do the following action.
TECHNICAL SERVICE MANUAL
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