Pin level detection on floating pin nRF51422https://devzone.nordicsemi.com/f/nordic-q-a/58928/pin-level-detection-on-floating-pin-nrf51422hi, We have a product in production but the PCB-A had been updated with new functionality. We want to make sure old f/w is not inadvertently loaded to new h/w. To do this, new PCB-A has an external P.U. removed and we will detect the two h/w revisionsen-USTelligent Community 13Wed, 11 Mar 2020 09:14:02 GMTRE: Pin level detection on floating pin nRF51422https://devzone.nordicsemi.com/thread/239276?ContentTypeID=1Wed, 11 Mar 2020 09:14:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8a4daeee-3d9a-4101-9e04-fca55586c960gbrown1966<p>Thank you for the confirmation, that makes sense.</p><div style="clear:both;"></div>RE: Pin level detection on floating pin nRF51422https://devzone.nordicsemi.com/thread/239266?ContentTypeID=1Wed, 11 Mar 2020 08:39:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8e328a3d-6a5d-46d2-9bc6-4d0b25343f3frun_ar<p>If you configure a pin as input, but does not configure pull up/down and do not have external pull. You are basically leaving the pin in floating state so it could be either 0 or 1.</p><div style="clear:both;"></div>