https://devzone.nordicsemi.com/f/nordic-q-a/39239/used-pinsHi, It seems to me that unused GPIO pins can stay float. However, earlier questions made me less confident. Is firmware setting is enough? Thanks, Danielen-USTelligent Community 13Sun, 07 Oct 2018 12:53:47 GMThttps://devzone.nordicsemi.com/thread/151924?ContentTypeID=1Sun, 07 Oct 2018 12:53:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8bcf14e3-462f-4d53-ba32-7af6da5ecba8Daniel Reisfeld<p>Thanks! Daniel</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/151922?ContentTypeID=1Sun, 07 Oct 2018 12:38:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:83e44d78-62d3-41ea-9a5c-d985be7e38abRK<p>Unused pins can float. The default works fine for that. In a finished and released product good engineering practice would be to tie unused pins to ground and explicitly set them to high impedence&nbsp;(even though that is the default). The defaults work fine but when you&#39;re done with a design it&#39;s good practice to tie every pin somewhere and explicitly initialise it&nbsp;</p><div style="clear:both;"></div>