https://devzone.nordicsemi.com/f/nordic-q-a/64729/nreset-pinCan I use P0.21 as a regular GPIO ? When I power the chip up, will it start correctly ? Is there any problem if I connect it to a LED and resistor ? How do I configure this port? Regards Andreen-USTelligent Community 13Wed, 12 Aug 2020 05:36:14 GMThttps://devzone.nordicsemi.com/thread/264148?ContentTypeID=1Wed, 12 Aug 2020 05:36:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0496790f-a751-4481-a577-dbb32ed2e20fJONATHAN LL<p>Hi</p> <p></p> <p>The P0.21/nRESET pin can be used as a GPIO, then is should not be a problem to use it for LED\resistor combo.<br /><br /><br />Here is a link to the<span>&nbsp;</span><a href="https://infocenter.nordicsemi.com/topic/struct_nrf52/struct/nrf52832_ps.html">nordic.infocenter</a><span>&nbsp;</span>whit the&nbsp;where you can find the pin assignment and GPIO list.<br /><br />Here are some links to other devzone post regarding same issue:</p> <p><a href="https://devzone.nordicsemi.com/f/nordic-q-a/16195/nrf52832-p0-21-reset-pin">https://devzone.nordicsemi.com/f/nordic-q-a/16195/nrf52832-p0-21-reset-pin</a></p> <p><a href="https://devzone.nordicsemi.com/f/nordic-q-a/18170/how-can-i-disable-reset-of-p0-21">https://devzone.nordicsemi.com/f/nordic-q-a/18170/how-can-i-disable-reset-of-p0-21</a></p> <p><a href="https://devzone.nordicsemi.com/f/nordic-q-a/28821/disabling-pin-21-of-nrf52832">https://devzone.nordicsemi.com/f/nordic-q-a/28821/disabling-pin-21-of-nrf52832</a></p> <p><a href="https://devzone.nordicsemi.com/f/nordic-q-a/29328/using-nrf52832-configuring-p0-21-reset-as-output">https://devzone.nordicsemi.com/f/nordic-q-a/29328/using-nrf52832-configuring-p0-21-reset-as-output</a></p> <p></p> <p>Regards,</p> <p>Jonathan</p><div style="clear:both;"></div>