https://devzone.nordicsemi.com/f/nordic-q-a/111633/flash-app-protect-factory-state-of-the-nrf5340Hello, I noticed that our self-produced PCB&#39;s with a nRF5340 SoC all have the cores locked upon delivery (probably app protect is activated), and have to be recovered before we can flash them. Why is this the case? Does the nRF5340 come with a preen-USTelligent Community 13Wed, 03 Jul 2024 14:23:47 GMThttps://devzone.nordicsemi.com/thread/492097?ContentTypeID=1Wed, 03 Jul 2024 14:23:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fdc36ffa-1801-4d92-a9ab-991315c908c8puz_md<p>Thanks, that helped understanding the strange behavior!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/486595?ContentTypeID=1Thu, 30 May 2024 09:00:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a9499629-5e99-4ea2-ba59-a9a14028affcSigurd Hellesvik<p>Hi,</p> <p>See <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/security/ap_protect.html">NCS APPROTECT docs</a>:</p> <p><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1717059568386v1.png" alt=" " /></p> <p>So it is basically on by default in nRF5340, even though it comes shipped without firmware.</p> <p>Regards,<br />Sigurd Hellesvik</p><div style="clear:both;"></div>