https://devzone.nordicsemi.com/f/nordic-q-a/112614/customized-nrf5340-board-firmware-writes-to-chip-with-no-responseI was able to run blinky successfully on my customized nrf5340 board, but it doesn&#39;t respond to writing matter related code, there is no output from the RTT, I refer to the design of the nrf5340dk, which contains a high-frequency crystal and a low-frequencyen-USTelligent Community 13Mon, 01 Jul 2024 09:13:59 GMThttps://devzone.nordicsemi.com/thread/491533?ContentTypeID=1Mon, 01 Jul 2024 09:13:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:428a4eb1-8311-497b-8480-ad5d6f8b087eJared<p>Hi,</p> <p>Are you using a module? Where is the High frequency crystal? I see that you don&#39;t have a low frequency crystal, have you modified the nRF5340 to use the internal RC oscillator instead?</p> <p>regards</p> <p>Jared&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/491458?ContentTypeID=1Sun, 30 Jun 2024 17:30:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:28f8b1c4-329f-4758-96da-09c47090f750cweib<p>I&#39;ve tried outputting the qspi as pins high and low to determine if the soldering was successful, they all output high and low normally, I&#39;ve also tried using the nrfjprog --qspieraseall command to erase the external flash and then re-write the firmware, it seems to erase normally, but re-write the firmware it still doesn&#39;t respond and logs</p> <p><pre class="ui-code" data-mode="text">WARNING: An operation that can take up to several minutes is being executed. WARNING: Please remain patient. Initializing the QSPI peripheral. Erasing. Uninitializing the QSPI peripheral.</pre></p><div style="clear:both;"></div>