https://devzone.nordicsemi.com/f/nordic-q-a/120407/matter-firmware-can-not-run-in-custom-board-nrf54l15I have an nRF54L15DK and a custom-designed nRF54L15 board. These two boards use different pins for peripherals. The NCS version used is v2.9.0. I compiled a Matter project, which runs on the nRF54L15DK, but there is no response when flashing it to ouren-USTelligent Community 13Thu, 03 Apr 2025 11:21:56 GMThttps://devzone.nordicsemi.com/thread/530435?ContentTypeID=1Thu, 03 Apr 2025 11:21:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:167efed6-5018-48a6-95a8-52feef4963deVidar Berg<p>Hello,</p> <p>The Matter samples include the bootloader (MCUBoot) by default. When using the nRF54L15DK as the build target, the onboard SPI flash is used for the secondary&nbsp;FW slot (as defined by the pm_static_nrf54l15dk_nrf54l15_cpuapp.yml file). This means that if you use this build target on a board that doesn&#39;t have this flash, or uses a different pinout, the bootloader will not be able to access the secondary slot and will refuse to boot the application.</p> <p>Default memory layout for Matter lock sample</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/pastedimage1743679231623v1.png" alt=" " /></p> <p>Does your custom board include SPI flash?</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>