Things in memory management such as MPU, fpages, address space can improve their documentation in Docs [Managing memory protection unit (MPU) in STM32 MCUs](http://www.st.com/resource/en/application_note/dm00272912.pdf) [mbed-uVisor](http://events.linuxfoundation.org/sites/events/files/slides/mbed-uvisor.pdf) [ARMv7-M Architecture Reference Manual](https://web.eecs.umich.edu/~prabal/teaching/eecs373-f10/readings/ARMv7-M_ARM.pdf)