https://devzone.nordicsemi.com/f/nordic-q-a/86758/enable-approtect-is-there-a-way-to-disableHi, I had enable APPROTECT ,SWD can&#39;t connect to chip，Is there a way to disable APPROTECT ?en-USTelligent Community 13Fri, 08 Apr 2022 07:48:16 GMThttps://devzone.nordicsemi.com/thread/362500?ContentTypeID=1Fri, 08 Apr 2022 07:48:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9cf8a94b-76f7-4c4a-a3b8-38a00f35cb3fEinar Thorsrud<p>Hi,</p> <p>The only way to disable APPROTECT is to erase the UICR, and that can only be done by an erase all (ERASEALL in the <a href="https://infocenter.nordicsemi.com/topic/ps_nrf52810/dif.html?unique_321009888">Control access port</a>). In practice that is most easily done using &quot;<code>nrfjprog --recover</code>&quot;. Note that this will erase&nbsp;entire flash content. There is (intentionally) no way around that.</p><div style="clear:both;"></div>