https://devzone.nordicsemi.com/f/nordic-q-a/41312/how-nrf52-secure-bootloader-worksHi All, I&#39;m new to nRF52. I&#39;m working on nRF52 PCA10040 board. How want to how the secure bootloader works? I tried to load application from DFU serial bootloader and I come across bank0 and bank1 concepts in bootloader. what these banks are useden-USTelligent Community 13Fri, 07 Dec 2018 13:17:59 GMThttps://devzone.nordicsemi.com/thread/160746?ContentTypeID=1Fri, 07 Dec 2018 13:17:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fb68ae64-ac24-4fe6-b49f-6854bfef2d77Einar Thorsrud<p>Hi,</p> <p>The bootloader and DFU process is quite complex, but there is extensive documentation. I suggest you look at these resources:</p> <ul> <li><a href="https://devzone.nordicsemi.com/b/blog/posts/getting-started-with-nordics-secure-dfu-bootloader">Getting started with Nordic&#39;s Secure DFU bootloader, a step by step guide</a></li> <li><a href="https://www.nordicsemi.com/en/DocLib/Content/SDK_Doc/nRF5_SDK/v15-2-0/lib_bootloader_modules">Bootloader and DFU modules</a></li> <li><a href="https://www.nordicsemi.com/en/DocLib/Content/SDK_Doc/nRF5_SDK/v15-2-0/examples_bootloader">DFU bootloader examples</a></li> </ul><div style="clear:both;"></div>