https://devzone.nordicsemi.com/f/nordic-q-a/16763/bootloader-without-softdeviceDear Nordic. I am developing bootloader without SD (s120_nrf51822_1.0.1). And after execution of bootloader, jump to application working with SD. Flash composed like below. SD is placed into 0x0000 (size: 0x18000) Bootloader is placeden-USTelligent Community 13Fri, 30 Sep 2016 09:04:53 GMThttps://devzone.nordicsemi.com/thread/64103?ContentTypeID=1Fri, 30 Sep 2016 09:04:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1287d9b5-f29b-43c4-a17d-5396ebb5c7c2bjorn-spockeli<p>Happy to help! Let me know if you run into any issues.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/64102?ContentTypeID=1Fri, 30 Sep 2016 08:50:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:64fb5b8c-65bb-4616-a0f4-c51316d22e78wiz_yoo<p>Thanks for your help. I&#39;ll check GitHub repo. I using s120_nrf51822_1.0.1 (SDK version is 7.1.0).</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/64104?ContentTypeID=1Fri, 30 Sep 2016 08:26:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9501d3b3-b480-4699-94d2-b1a6748f25e3bjorn-spockeli<p>Which SDK version are you using? I recommend that you take a look at <a href="https://github.com/NordicSemiconductor/nrf51-dfu-spi-slave">this</a> GitHub repo. It contains a bootloader example that does not use the SoftDevice.</p><div style="clear:both;"></div>