https://devzone.nordicsemi.com/f/nordic-q-a/81857/how-can-i-read-the-uicr--otp-register-of-nrf9160I want to use the OTP register for production, but I don’t have permission to read the contents of the OTP register。 The following are my steps: 1.Allow the UICR area to be readable in the secure_services.c file. 2.Read the value of OTP throughen-USTelligent Community 13Tue, 23 Nov 2021 02:24:51 GMThttps://devzone.nordicsemi.com/thread/340217?ContentTypeID=1Tue, 23 Nov 2021 02:24:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:43c9b034-a673-4ba8-9fb0-9c9e165bcd75xinjiang<p>My current requirement is to read the value of OTP in the app image, can you tell me how to read it in the app image?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/340162?ContentTypeID=1Mon, 22 Nov 2021 15:36:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c6cf451f-4cdb-4c7e-bd80-d18fcbcd3cd0Hakon<p>Hello,</p> [quote user=""]I accessed the KMU register in the application(ns) and found no effect. Do KMU registers need to be accessed in spm?[/quote] <p>&quot;Access to the KMU, and the key slots in the UICR, is only allowed from secure mode.&quot; is a line from the documentation. So yes, it does. I believe your question is being addressed in <a href="https://devzone.nordicsemi.com/f/nordic-q-a/80830/how-can-i-read-the-uicr-register-of-9160">this ticket</a>, is that correct? Or are you asking about something else here?</p><div style="clear:both;"></div>