https://devzone.nordicsemi.com/f/nordic-q-a/30056/dfu-on-51822aaDear guys, now I use SDK12.3. My application DFU is works fine base on buttonless dfu sample in pca10028.boad ic is nrf51822AC. IROM1:0x1b000.0x25000.IRAM1: start-0x2002fe8.size-0x7018. but It is works fail on NRF51822AA ic. I configed IRAM1:starten-USTelligent Community 13Wed, 31 Jan 2018 10:02:17 GMThttps://devzone.nordicsemi.com/thread/119361?ContentTypeID=1Wed, 31 Jan 2018 10:02:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ca3ae4fc-a3a2-4691-8a09-e063cf1ec352MartinBL<p>Hi,</p> <p>What is the build code on your chip? <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf51/dita/nrf51/compatibility_matrix/nRF51822_ic_revision_overview.html?cp=3_0_1">Are you using a revision 3 IC</a>? Older revisions <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf51/dita/nrf51/compatibility_matrix/nRF51422_nRF51822_ic_rev_sdk_sd_comp_matrix.html?cp=3_0_4">are not guaranteed to work with SDK 12.3</a>. If this is all in order can you please have a look at these two threads?</p> <p><a href="https://devzone.nordicsemi.com/question/107787/secure-dfu-bootloader-rom-ram-configurations-for-nrf51822_xxaa/">Secure DFU Bootloader ROM / RAM configurations for nRF51822_xxAA</a></p> <p><a href="https://devzone.nordicsemi.com/question/65932/problems-with-dfu-bootloader/">problems with DFU bootloader</a></p><div style="clear:both;"></div>