https://devzone.nordicsemi.com/f/nordic-q-a/69320/nrf21-nrf52810-in-soft-deviceCan I use nRF21 in GPIO mode (not SPI) using the PA/LNA assist feature of the S112 soft device? Per section 5.3 of the datasheet, it seems I could wire the PDN pin to be the OR of the TX_EN and RX_EN pin. And then the CS could be hard-wired low alwaysen-USTelligent Community 13Thu, 10 Dec 2020 14:22:56 GMThttps://devzone.nordicsemi.com/thread/284354?ContentTypeID=1Thu, 10 Dec 2020 14:22:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0dcbf73f-b27d-4f8b-b768-1d944fdd6d18Kenneth<p>Unfortunately&nbsp;nRF21&nbsp;is not supported. The&nbsp;current implementation in S112 softdevice have been optimized and tuned for the SKY66112, due to difference in timing between the nRF21 and SKY66112, it may cause the modulation and spectrum to be affected if used with nRF21.</p> <p>Best regards,<br />Kenneth</p><div style="clear:both;"></div>