The STM32 MPUs include set of hardware mechanisms to secure the running software.
Depending on the STM32 Arm® Cortex® MPUs 
family, different isolation management options are available.
The following articles focus on the specific management of isolation mechanism per topology:
- Memory isolation
- TZC internal peripheral on STM32MP1 series
- ETZPC internal peripheral on STM32MP1 series
- Resource Isolation Framework overview on STM32MP2 series
- CPU execution level / privilege level isolation
- Trustzone environment on STM32MP1 series and on STM32MP2 series
- Peripheral isolation
- ETZPC internal peripheral on STM32MP1 series
- Resource Isolation Framework overview on STM32MP2 series
Some more complex peripherals directly include security management within its own registers to handle isolation level. The secure configuration depends on the global topology used on the MPU family. It is the case for:
- BSEC internal peripheral
- EXTI internal peripheral
- FMC internal peripheral
- GPIO internal peripheral
- HPDMA internal peripheral
- HSEM internal peripheral
- IPCC internal peripheral
- PWR internal peripheral
- RCC internal peripheral
- RTC internal peripheral
- TAMP internal peripheral
Arm® is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere. 
Arm® is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.