https://devzone.nordicsemi.com/f/nordic-q-a/90441/spi-chip-select-polarity-changed-from-nrf-connect-sdk-v1-6-1-to-1-9-1I have a working project developed against nRF Connect SDK version 1.6.1. I am attempting to update to version 1.9.1 nRF Connect SDK as a stepping stone to v2.0.0. Upon further investigation, I determined that the reason that the device is not workingen-USTelligent Community 13Thu, 28 Jul 2022 14:42:59 GMThttps://devzone.nordicsemi.com/thread/379164?ContentTypeID=1Thu, 28 Jul 2022 14:42:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8cd4ed3e-9d6e-44f7-9888-5c48b4988e5bSimon<p>Check out this DevZone ticket, I think it may be relevant for you:&nbsp;&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/89440/migrating-to-sdk-2-0-0-caused-my-cs-pin-to-stop-working-on-my-spi">Migrating to SDK 2.0.0 caused my CS pin to stop working on my SPI</a>&nbsp;</p> <p>Best regards,</p> <p>Simon&nbsp;</p><div style="clear:both;"></div>