Kernel Power Management
A version of this page is also available for
4/8/2010
The kernel operates in one of several power states and transitions between them when a trigger event occurs.
The following illustration shows the power states and transitions.
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The following table describes the transitions between power states for a Windows Mobile target device.
| Transition | Description |
|---|---|
Power-on reset |
Target device clears working RAM and initializes the file system. |
Cold boot |
First application of power, for example, when a backup battery is installed. |
Warm boot |
Transition from the On power state. A warm boot clears the working RAM. |
On-to-Idle |
Transition from a fully running state to a state in which the microprocessor is using little power. |
Idle-to-On |
Transition of the microprocessor from low-power to full-power operation. |
On-to-Suspend |
Transition to a stopped microprocessor, as a result of certain events. |
Suspend-to-On |
Transition of a stopped microprocessor to full-power operation based on specific wake-up events. |
On-to-Critical off |
Transition when critically low battery power is detected. You must implement the function for transitioning to the Critical Off state for your device. |
For more information about kernel power management, see the following topics: