https://devzone.nordicsemi.com/f/nordic-q-a/101187/nrf5340-external-flash---how-to-increase-mcuboot-partitionHi there, I am developing on nRF5340-DK using NCS. I am using the onboard external flash to hold the MCUBoot secondary image slot so that I can support larger application images. I would like to enable some additional features in MCUBoot (Serial recoveryen-USTelligent Community 13Mon, 26 Jun 2023 12:35:14 GMThttps://devzone.nordicsemi.com/thread/432971?ContentTypeID=1Mon, 26 Jun 2023 12:35:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a8eecd0c-f337-4e2d-918b-6e2711cc5c3cSigurd Hellesvik<p>Hi,</p> <p>You can use <span><span dir="ltr"><a title="https://github.com/nrfconnect/sdk-nrf/blob/e83eaec6bf26e2ee1234608b9b5791b6ce56b623/modules/mcuboot/boot/zephyr/kconfig#l21c8-l21c33" href="https://github.com/nrfconnect/sdk-nrf/blob/e83eaec6bf26e2ee1234608b9b5791b6ce56b623/modules/mcuboot/boot/zephyr/Kconfig#L21C8-L21C33" rel="noopener noreferrer" target="_blank">CONFIG_PM_PARTITION_SIZE_MCUBOOT</a></span></span> for this.<br />That would be inside <span style="font-family:&#39;courier new&#39;, courier;">child_image/mcuboot/boards/nrf5340dk_nrf5340_cpuapp.conf</span>. <br />See <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/app_dev/multi_image/index.html">multi image builds&nbsp; </a>for how this file overwrites default MCUboot configs:</p> <p><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1687782855944v3.png" alt=" " /></p> <p>Use child_image/mcuboot.conf if you want to overlay instead.<br />Also mark that this requires (G), so if you do not have (G), you can not use the path your use.</p> <p>Or you can do it using <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/scripts/partition_manager/partition_manager.html#static-configuration">static partitioning</a>.</p> <p>Regards,<br />Sigurd Hellesvik</p><div style="clear:both;"></div>