Many STM32 MCUs don't even allow this, you have to physically replace the device if it's set to full protection, as it cannot be reversed. Yes, built in self-de

Many STM32 MCUs don't even allow this, you have to physically replace the device if it's set to full protection, as it cannot be reversed. Yes, built in self-destruct. See page 5 of the following document, it is the Level 2 protection that's irreversible: https://www.st.com/resource/en/product_training/STM32F7_Security_Memories_Protections.pdf https://www.st.com/resource/en/product_training/STM32F7_Secu... The PIC32 MCUs I use always allow you to reverse the protection, after erasing the device.