Power Management in Audio Drivers (Windows Embedded CE 6.0)
1/6/2010
When the system goes into the suspend state, the Device Manager calls the audio driver's WAV_PowerDownfunction. This function should call the PDD_AudioPowerHandler function to allow the PDD to put the hardware in a low power consumption mode, if available.
When the system resumes, the Device Manager calls the audio driver's WAV_PowerUp function, which should also call PDD_AudioPowerHandler.
The WAV_PowerUp function also calls the SetInterruptEvent function for the audio interrupt to allow any active handles to be released by the IST.