ease remember that on system with security enabled, the system always boots in secure and
the secure application is responsible for launching the non-secure application. When the secure application is started the MPU
is already configured (by STiROT) to limit the execution area to the project firmware execution slot. This is done in order to avoid
any malicious code execution from an unauthorised area (RAM, out of execution slot in user flash ...). Once started, it is up to the secure
application to adapt t