https://devzone.nordicsemi.com/f/nordic-q-a/122621/config-p1-00-and-p1-01-as-uart0-rx-and-txHi Team, We recently received our custom PCBs and are currently trying to configure pins P1.00 and P1.01 as UART0 RX and TX respectively. However, the UART communication is not working as expected. Previously, we tested the same setup on the DK boarden-USTelligent Community 13Tue, 01 Jul 2025 12:13:01 GMThttps://devzone.nordicsemi.com/thread/541028?ContentTypeID=1Tue, 01 Jul 2025 12:13:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cab20dce-87ea-44b4-9d92-8db09dba3f43sabir khan<p>Thanks Vidar.</p> <p></p> <p>it already worked. I followed below steps.</p> <p><span data-teams="true"><a id="menur5l1" class="fui-Link ___1q1shib f2hkw1w f3rmtva f1ewtqcl fyind8e f1k6fduh f1w7gpdv fk6fouc fjoy568 figsok6 f1s184ao f1mk8lai fnbmjn9 f1o700av f13mvf36 f1cmlufx f9n3di6 f1ids18y f1tx3yz7 f1deo86v f1eh06m1 f1iescvh fhgqx19 f1olyrje f1p93eir f1nev41a f1h8hb77 f1lqvz6u f10aw75t fsle3fq f17ae5zn" title="https://devzone.nordicsemi.com/f/nordic-q-a/90563/config-p1-00-and-p1-01-as-uart0-rx-and-tx" href="https://devzone.nordicsemi.com/f/nordic-q-a/90563/config-p1-00-and-p1-01-as-uart0-rx-and-tx" rel="noopener noreferrer" target="_blank">https://devzone.nordicsemi.com/f/nordic-q-a/90563/config-p1-00-and-p1-01-as-uart0-rx-and-tx</a></span></p> <div itemprop="teams-copy-link"></div><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/541027?ContentTypeID=1Tue, 01 Jul 2025 12:04:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:03cc970c-79eb-432b-a776-042318e550a5Vidar Berg<p>Hello Sabir,</p> <p><span>&nbsp;</span><strong>P1.00</strong><span>&nbsp;</span><span>and</span><span>&nbsp;</span><strong>P1.01</strong><span>&nbsp;are by default assigned to the network core if you&#39;re using nRF5340dk/nrf5340/cpuapp as your build target:&nbsp;</span></p> <p><span><a href="https://github.com/zephyrproject-rtos/zephyr/commit/ebe4cf5035fa1c25ea6db67c567159ff45b7dfee">https://github.com/zephyrproject-rtos/zephyr/commit/ebe4cf5035fa1c25ea6db67c567159ff45b7dfee</a>&nbsp;</span></p> <p><span>You can disable the pin forwarding to the network core by creating a board DT overlay in your project folder as discussed here:</span></p> <p><span>&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/110289/nrf5340-gpio-forwarder-availibility">nrf5340 Gpio forwarder availibility</a>&nbsp;</span></p> <p><span>Best regards,</span></p> <p><span>Vidar</span></p><div style="clear:both;"></div>