https://devzone.nordicsemi.com/f/nordic-q-a/17988/secure-dfu-uicr-placement-in-applicationBackground: We use NRF52 chip along with SDK 12.1.0. Since we have a few components of firmware (i.e. secure DFU settings, secure DFU , application, Softdevice) that go into the FLASH memory which each have an image file associated with, I am trying toen-USTelligent Community 13Mon, 28 Nov 2016 08:57:51 GMThttps://devzone.nordicsemi.com/thread/69351?ContentTypeID=1Mon, 28 Nov 2016 08:57:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:279b0619-189d-4c5b-98e5-d63762d8a8f1bjorn-spockeli<p>Hi Farhang,</p> <p>you are correct, the MBR params page is the culprit and it should not be defined in the application, only in the bootloader. Please see the answer in <a href="https://devzone.nordicsemi.com/question/100609/sdk-12-bootloader-erased-after-programming/">this</a> post.</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>