https://devzone.nordicsemi.com/f/nordic-q-a/115229/nrf52840-default-bootloaderHello, Do the micro controllers out of the box before installing onto a PCB already have a bootloader? What do I need to consider to be able to reprogram my MCU on the PCB board? Thanks, Calvinen-USTelligent Community 13Tue, 08 Oct 2024 07:27:46 GMThttps://devzone.nordicsemi.com/thread/505275?ContentTypeID=1Tue, 08 Oct 2024 07:27:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:04ac91d4-5b27-4a03-93c3-0ce99404c0a7H&#229;kon Alseth<p>There are section in the intermediate course on our dev academy:</p> <p><a href="https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-8-bootloaders-and-dfu-fota/">https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-8-bootloaders-and-dfu-fota/</a></p> <p>&nbsp;</p> <p>However; I do recommend that you look into the fundamentals course first.</p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/505229?ContentTypeID=1Mon, 07 Oct 2024 16:23:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ef8b867e-172a-4a4c-ac11-5dc9d082ee1elicalvin01<p>Is there a guide to programming a fresh bootloader to the NRF52840? If I were to upload a bitstream like blinky to a blank slate MCU, will the MCU perform blink?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/504926?ContentTypeID=1Fri, 04 Oct 2024 06:59:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5d1c3093-d444-4cdb-8b31-0ac10a37faf6H&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>There is no bootloader in the nRF5-series devices. They will need to be programmed using the SWD protocol.</p> <p>To do this, you need to have VDD, GND, SWDIO, and SWDCLK routed on your board and connected to the appropriate pins on your SWD-capable debugger/programmer.</p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>