https://devzone.nordicsemi.com/f/nordic-q-a/106996/nrf53-network-core-remains-securedHi all, I I&#39;m attempting to get the nRF5340 working with my firmware, but I&#39;m encountering a problem that I can&#39;t understand. I can program and boot the app core without any issue. The app firmware is calling nrf53_handle_approtect with ENABLE_APPROTECT_USER_HANDLINGen-USTelligent Community 13Tue, 02 Jan 2024 10:29:52 GMThttps://devzone.nordicsemi.com/thread/462241?ContentTypeID=1Tue, 02 Jan 2024 10:29:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:43abd68c-ec4e-47b9-a280-b6ea434e12f5Jocelyn Masserot<p>I found the issue, because of a bad configuration the network core was not calling&nbsp;<span>nrf53_handle_approtect.</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/462194?ContentTypeID=1Tue, 02 Jan 2024 07:37:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:329851d8-c2c5-46f2-b438-383d3fa1fb02Jocelyn Masserot<p>Thanks for your reply. I&#39;m building the network image as non-secure, no trustzone.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/462114?ContentTypeID=1Fri, 29 Dec 2023 14:43:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:41b6b201-a708-41a0-a75b-8b8a71284afcSigurd Hellesvik<p>Hi,</p> <p>I do not think it impacts this issue, but so I can try to reproduce as closely as possible: Do you build with TF-M (_ns) or not?</p> <p>Regards,<br />Sigurd Hellesvik</p><div style="clear:both;"></div>