https://devzone.nordicsemi.com/f/nordic-q-a/100236/p0-25-and-p0-26-of-nrf52832-failed-when-there-is-a-850mhz-signal-sendingWhen we use P0.25 and P0.26 of NRF52832 as the input keys ,Without the 12pF, It&#39;s usually failed (no any response besides power on again)when there is a 20dBm 850MHz signal( NB-IOT singal) on the same PCB. But when we had added the 12pF, It is a littleen-USTelligent Community 13Tue, 30 May 2023 09:07:07 GMThttps://devzone.nordicsemi.com/thread/428097?ContentTypeID=1Tue, 30 May 2023 09:07:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:95d2274d-fdb5-4f27-9008-5f108ed46953JONATHAN LL<p>Hi,<br /><br />Can you elaborate on what exactly is failing? <br />&nbsp;- Does the device reset or does it stop working until reset?<br />&nbsp;- What is the voltage on the different VDD pins and the GPIO P0.25 and P0.26?<br /><br /><br />&nbsp;<br /><br />There is an errata for the P0.25 and P0.26 where not having a cap on the two pins will cause&nbsp;issues with spurious emissions in RX mode, see&nbsp;<a href="https://infocenter.nordicsemi.com/topic/errata_nRF52832_Rev3/ERR/nRF52832/Rev3/latest/anomaly_832_138.html?cp=5_2_1_0_1_35">https://infocenter.nordicsemi.com/topic/errata_nRF52832_Rev3/ERR/nRF52832/Rev3/latest/anomaly_832_138.html?cp=5_2_1_0_1_35</a>&nbsp;<br /><br /><br />If you want we can do a review of the schematic and layout of the PCB, but maybe you want it to be private. You can create a new ticket and make it private or I can make this ticket private if that is something you want.&nbsp;<br /><br />Regards,<br />Jonathan</p><div style="clear:both;"></div>