https://devzone.nordicsemi.com/f/nordic-q-a/49834/secure-part-of-flashfor 52840, customer want to have a part of flash, it can set write protect, to avoid illegal erase or destroy, they use this part of flash to run boot-loader, is it passable?en-USTelligent Community 13Tue, 16 Jul 2019 06:31:26 GMThttps://devzone.nordicsemi.com/thread/198592?ContentTypeID=1Tue, 16 Jul 2019 06:31:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f5a2f682-feb8-4128-9cf6-0403147393c2Carl Richard<p>Hello, Carey!<br /><br />This is possible using Access Control List(ACL). Check it out in the&nbsp;<a href="https://infocenter.nordicsemi.com/index.jsp?topic=%2Fps_nrf52840%2Facl.html&amp;resultof=%22%61%63%6c%22%20">documentation</a>.<br />More&nbsp;<a href="https://infocenter.nordicsemi.com/index.jsp?topic=%2Fps_nrf52840%2Facl.html&amp;resultof=%22%61%63%6c%22%20">here</a>.<br /><br />Small example in this&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/25926/flash-protection-nrf52840-sdk-14-0-0/102119#102119">thread</a>.<br /><br />Best regards<br />Carl Richard&nbsp;</p><div style="clear:both;"></div>