https://devzone.nordicsemi.com/f/nordic-q-a/5530/do-i-need-to-adjust-my-firmware-app-region-offsets-after-i-begin-using-the-bootloaderIt took a bit to learn these offsets and configure the keil project for them. Do these need to change now that I want to begin using the OTA bootloader? I&#39;m imagining that the bootloader starts at memory location 0x00000000? How should IROM and IRAM changeen-USTelligent Community 13Wed, 11 Feb 2015 18:29:45 GMThttps://devzone.nordicsemi.com/thread/19343?ContentTypeID=1Wed, 11 Feb 2015 18:29:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:eb268cd6-1e73-4007-a981-5655f5c9bcb6Matt Barr<p>In addition to the soft device specification, there is a lot of information describing bootloader and related example projects in the new SDKs, for example <a href="http://developer.nordicsemi.com/nRF51_SDK/doc/7.2.0/s110/html/a00062.html">here</a> in the 7.2.0 SDK. The memory layout is described in <a href="http://developer.nordicsemi.com/nRF51_SDK/doc/7.2.0/s110/html/a00067.html">this section</a>. Also see the example project setups for applications with DFU support.</p> <p>You may also find <a href="https://devzone.nordicsemi.com/question/22056/combining-sd-dfu-and-application-hex-and-programming/">this thread</a> useful with regard to programming sofdevice, application, bootloader and related application valid settings.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/19342?ContentTypeID=1Wed, 11 Feb 2015 03:11:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:932ec9a4-8c15-4c50-9f86-1acb1fe9705cCharles Manning<p>Read the soft device specification.</p> <p>Most people would expect the bootloader to reside at 0, but it does not. Instead it is normally placed at the top of memory (ie the last few k of flash).</p> <p>You then also need to program the bootlaoder address into a register. The &quot;MBR&quot; of the soft device reads this register, sees there is a bootloader, and jumps to that.</p><div style="clear:both;"></div>