RF testing uart pin configuration issuehttps://devzone.nordicsemi.com/f/nordic-q-a/121227/rf-testing-uart-pin-configuration-issueHi, I am working on RF testing on the custom board. I have configured the nrf UART TX in p1.04 and UART RX pin in p0.13. UART TX pin is working fine, but the UART Rx is not working. I tried on the NRF5340 DK, but it is not working on the DK eitheren-USTelligent Community 13Wed, 07 May 2025 06:24:46 GMTRE: RF testing uart pin configuration issuehttps://devzone.nordicsemi.com/thread/534192?ContentTypeID=1Wed, 07 May 2025 06:24:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8296eb1a-bd50-4959-aee4-84d40d0a72dbVidar Berg[quote userid="135782" url="~/f/nordic-q-a/121227/rf-testing-uart-pin-configuration-issue/534191"]p0.13, p0.14, p0.15 and p0.16.[/quote] <p>Are all these pins accessible on your custom board?</p><div style="clear:both;"></div>RE: RF testing uart pin configuration issuehttps://devzone.nordicsemi.com/thread/534191?ContentTypeID=1Wed, 07 May 2025 06:23:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:52af2002-24a6-4d77-a31d-bf4a6423c77dSufaira N<p><span>Thanks for the reply.</span></p> <p><span>Yes, it is working when I use other pins except p0.13, p0.14, p0.15 and p0.16.</span></p><div style="clear:both;"></div>RE: RF testing uart pin configuration issuehttps://devzone.nordicsemi.com/thread/534190?ContentTypeID=1Wed, 07 May 2025 06:17:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:62872efe-30d5-4788-ba3d-c1f268c56714Vidar Berg<p>Thanks for confirming. Commenting the lines you did will free up P0.13. Does RX work if you swap TX/RX or assign RX to another pin?</p><div style="clear:both;"></div>RE: RF testing uart pin configuration issuehttps://devzone.nordicsemi.com/thread/534187?ContentTypeID=1Wed, 07 May 2025 06:09:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dc5fd654-3dd3-4602-ab92-e83f269dbd79Sufaira N<div>&nbsp; I commented in 2 files</div> <div></div> <div>1) In nrf5340_cpuapp_common_pinctrl.dtsi,</div> <div><br /> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// qspi_default: qspi_default {</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp;group1 {</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;psels = &lt;NRF_PSEL(QSPI_SCK, 0, 17)&gt;,</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;NRF_PSEL(QSPI_IO0, 0, 13)&gt;,</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;NRF_PSEL(QSPI_IO1, 0, 14)&gt;,</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;NRF_PSEL(QSPI_IO2, 0, 15)&gt;,</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;NRF_PSEL(QSPI_IO3, 0, 16)&gt;,</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;NRF_PSEL(QSPI_CSN, 0, 18)&gt;;</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;nordic,drive-mode = &lt;NRF_DRIVE_H0H1&gt;;</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp;};</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// };</span></div> <br /> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// qspi_sleep: qspi_sleep {</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp;group1 {</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;psels = &lt;NRF_PSEL(QSPI_SCK, 0, 17)&gt;,</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;NRF_PSEL(QSPI_IO0, 0, 13)&gt;,</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;NRF_PSEL(QSPI_IO1, 0, 14)&gt;,</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;NRF_PSEL(QSPI_IO2, 0, 15)&gt;,</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;NRF_PSEL(QSPI_IO3, 0, 16)&gt;;</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;low-power-enable;</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp;};</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp;group2 {</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;psels = &lt;NRF_PSEL(QSPI_CSN, 0, 18)&gt;;</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;low-power-enable;</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;bias-pull-up;</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// &nbsp; &nbsp; &nbsp;};</span></div> <div><span>&nbsp; &nbsp; &nbsp; &nbsp; </span><span>// };&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</span></div> <div><span> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</span></div> <div><span>2) In nrf5340_cpuapp_common.dtsi&nbsp;</span></div> <div><span></span></div> <div> <div> <div><span>// &amp;qspi {</span></div> <div><span>// &nbsp; &nbsp; &nbsp;status = &quot;okay&quot;;</span></div> <div><span>// &nbsp; &nbsp; &nbsp;pinctrl-0 = &lt;&amp;qspi_default&gt;;</span></div> <div><span>// &nbsp; &nbsp; &nbsp;pinctrl-1 = &lt;&amp;qspi_sleep&gt;;</span></div> <div><span>// &nbsp; &nbsp; &nbsp;pinctrl-names = &quot;default&quot;, &quot;sleep&quot;;</span></div> <div><span>// &nbsp; &nbsp; &nbsp;mx25r64: mx25r6435f@0 {</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;compatible = &quot;nordic,qspi-nor&quot;;</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;reg = &lt;0&gt;;</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;/* MX25R64 supports only pp and pp4io */</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;writeoc = &quot;pp4io&quot;;</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;/* MX25R64 supports all readoc options */</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;readoc = &quot;read4io&quot;;</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;sck-frequency = &lt;8000000&gt;;</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;jedec-id = [c2 28 17];</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;sfdp-bfp = [</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;e5 20 f1 ff &nbsp;ff ff ff 03 &nbsp;44 eb 08 6b &nbsp;08 3b 04 bb</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;ee ff ff ff &nbsp;ff ff 00 ff &nbsp;ff ff 00 ff &nbsp;0c 20 0f 52</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;10 d8 00 ff &nbsp;23 72 f5 00 &nbsp;82 ed 04 cc &nbsp;44 83 68 44</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;30 b0 30 b0 &nbsp;f7 c4 d5 5c &nbsp;00 be 29 ff &nbsp;f0 d0 ff ff</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;];</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;size = &lt;67108864&gt;;</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;has-dpd;</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;t-enter-dpd = &lt;10000&gt;;</span></div> <div><span>// &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;t-exit-dpd = &lt;35000&gt;;</span></div> <div><span>// &nbsp; &nbsp; &nbsp;};</span></div> <div><span>// };</span></div> </div> </div> </div><div style="clear:both;"></div>RE: RF testing uart pin configuration issuehttps://devzone.nordicsemi.com/thread/534158?ContentTypeID=1Tue, 06 May 2025 16:43:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:df22ebfc-01fc-4977-afc8-98918a7f37a6Vidar Berg<p>Hello,</p> <p>P0.13 is not connected&nbsp;to the pin header on the DK unless you have shorted the solder bridge mentioned here:&nbsp;<a href="https://docs.nordicsemi.com/bundle/ug_nrf5340_dk/page/UG/dk/hw_external_memory.html">https://docs.nordicsemi.com/bundle/ug_nrf5340_dk/page/UG/dk/hw_external_memory.html</a>&nbsp;</p> [quote user=""]QSPI_IO0 is also using p0.13.So I commented the configuration of QSPI, which also didn&#39;t work.[/quote] <p>In the devictree? Please show&nbsp;the configuration you commented out.</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>