https://devzone.nordicsemi.com/f/nordic-q-a/30455/nrf52840-resetn-pin-configurationWhen P0.18 is configured as the RESETn pin, is there a pull-up enabled? In our design we have an external CPU driving the nRF52 RESETn line. We have a pull-down on that line (10k) and we are seeing 1.3V with a VCC of 3.3V when our CPU has that lineen-USTelligent Community 13Tue, 13 Feb 2018 16:40:04 GMThttps://devzone.nordicsemi.com/thread/120738?ContentTypeID=1Tue, 13 Feb 2018 16:40:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8cc876c5-9aa0-4bbd-a6fc-ddec7e5b3954bpiquette<p>We have a pull-down because we want the radio(s) to stay in reset until the CPU enables them.</p> <p>Where is this RESETn pull-up documented?</p> <p>Is there any way to disable it?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/120673?ContentTypeID=1Tue, 13 Feb 2018 08:36:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:69a70da7-8f26-4b0c-94af-94c6ce7f1073haakonsh<p>Hey Brian,</p> <p>The reset pin does indeed enable a pull-up of 13k typ. This fits well with the observed 1.3V: 3.3V * 10k/23k = 1.43V.&nbsp;</p> <p><br />Why do you have a pull-down on a reset line that is active low?</p> <p>Cheers,</p> <p>Håkon.</p><div style="clear:both;"></div>