I have a design inquiry that involves interfacing a pair of digital MEMs PDM microphones to two different MCU's (one for wake word processing and another for speech processing after waking). Such a design would reasonably require two clock sources to the mic.
Does anybody know what design strategies exist so that PDM mics can be shared among different downstream audio processors?
I'm thinking that either a logical or of active MCU clock outputs or slaving one MCU clock to the other would do the job. I certainly don't want to add mics due to unnecessary BOM costs.
Thanks - John