I've been experimenting with PDM Rx up over 100kHz, and it appears that as soon as the MCLK_DIV goes from 3 to 2, that the MCLK goes to 10MHz, and that's it. That happens for anything over 104000 Hz Sampling Frequency. I'm using ESP-IDF-5.1.4 I'm thinking (hoping) that it's something in the driver w...

Unfortunately, that won't save any power, as what I'm wanting is to sleep during the 9sec PDM recording to DMA, when the processor is doing nothing.

Hi, I have an application where I am recording from stereo PDM microphones for a short duration (~10sec) then storing this on an SD card, along with values from some environmental sensors. Everything is working nicely, but I'd like to improve the power performance for instances where the device is r...

@EDsteve - very curious if you were ever able to get an answer to whether I2S -> DMA is possible during Light Sleep?

I have a bioacoustic application as well - and am keen to extend battery life as much as possible.

Thanks!
-Tim