https://devzone.nordicsemi.com/f/nordic-q-a/120497/max-pdm-frequencyHi! What is the max PDM frequency I can set? Is the clock limited to these options? https://docs.nordicsemi.com/bundle/ps_nrf5340/page/pdm.html https://www.infineon.com/dgdl/Infineon-IM73D122-DataSheet-v01_00-EN.pdf?fileId=8ac78c8c83cd3081018409cafdfb46dben-USTelligent Community 13Mon, 07 Apr 2025 21:06:01 GMThttps://devzone.nordicsemi.com/thread/530892?ContentTypeID=1Mon, 07 Apr 2025 21:06:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2e646ca8-5f3f-4b8a-88f9-27f48b48b5fbKenneth<p>The short answer for the nRF5340: We have only tested and qualified specific listed values, hence we don&#39;t recommend other values (<a href="https://docs.nordicsemi.com/bundle/ps_nrf5340/page/pdm.html">https://docs.nordicsemi.com/bundle/ps_nrf5340/page/pdm.html</a>)</p> <p>- 16 kHz output sample rate, 16-bit samples<br />- Selectable ratio of 64 or 80 between PDM_CLK and output sample rate<br />-&nbsp;<img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1744060067149v1.png" alt=" " /></p> <p>For the nRF54L15 it looks to be more values supported, but you can assume the same: We have only tested and qualified specific listed values, hence we can&#39;t recommend other values (<a href="https://docs.nordicsemi.com/bundle/ps_nrf54L15/page/pdm.html">https://docs.nordicsemi.com/bundle/ps_nrf54L15/page/pdm.html</a>)</p> <p>- 8 kHz, 16 kHz, 32 kHz, or 48k Hz output sample rate, 16-bit samples<br />- Supports digital microphone clocks at 768 kHz, 800 kHz, 1. 024 MHz , 1.536 MHz, 2.048 MHz , 3.072 MHz , 1.28 MHz, and 2.56 MHz<br />- Selectable ratio of 32, 48, 50, 64, 80, 96, 100, or 128 between PDM_CLK and output sample rate</p> <p>Kenneth</p><div style="clear:both;"></div>