https://devzone.nordicsemi.com/f/nordic-q-a/48728/problem-sometimes-after-flash-erase-device-is-restartHello All, I am working on nRF51822 using IAR IDE and nRF51 SDK 12.3.0. Right now I am store data in flash In this first I am erase flash and then write data in flash For more idea I give step, 1) Erase last page 2) Write data in last pageen-USTelligent Community 13Sat, 28 Oct 2023 07:57:23 GMThttps://devzone.nordicsemi.com/thread/452866?ContentTypeID=1Sat, 28 Oct 2023 07:57:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:50e0ba8c-d156-43be-8592-d5703af9aaabaniket shinde<p>Hello,</p> <p>Can I use this Jlink to flash NRF51822 with Secure_bootloader?</p> <p><a href="https://compoindia.com/product/jlink-v9-j-link-debugger-emulator-high-speed-firmware/?gclid=CjwKCAjwv-2pBhB-EiwAtsQZFEZEzRsf4MO115WDQDZp1EsunPZzBXFeVNuzeg3gnnZ7na_kHHNNyRoCWlwQAvD_BwE">https://compoindia.com/product/jlink-v9-j-link-debugger-emulator-high-speed-firmware/?gclid=CjwKCAjwv-2pBhB-EiwAtsQZFEZEzRsf4MO115WDQDZp1EsunPZzBXFeVNuzeg3gnnZ7na_kHHNNyRoCWlwQAvD_BwE</a></p> <p>I want to use OTA update in my application.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/193658?ContentTypeID=1Wed, 19 Jun 2019 12:13:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4dcb8879-f44d-4faf-8e18-13efe3528de0Vidar Berg<p>Hi <span>Urvisha</span>,</p> <p>Is the Softdevice enabled&nbsp;while you do the flash operations? That could&nbsp;explain the reset as the write/erase access to flash can block the Softdevice,&nbsp;and therefore break the protocol timing.&nbsp;Please refer to the Softdevice Flash API for more details:&nbsp;<a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s130.sds/dita/softdevices/s130/flash_mem_api/flash_mem_api.html?cp=4_7_2_0_7">https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s130.sds/dita/softdevices/s130/flash_mem_api/flash_mem_api.html?cp=4_7_2_0_7</a>&nbsp;</p> <p>Regards,</p> <p>Vidar</p><div style="clear:both;"></div>