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5.1. About the MPU

The MPU is an optional component for memory protection. The processor supports the standard ARMv7 Protected Memory System Architecture model. The MPU provides full support for:

  • protection regions

  • overlapping protection regions, with ascending region priority:

    • 7 = highest priority

    • 0 = lowest priority.

  • access permissions

  • exporting memory attributes to the system.

MPU mismatches and permission violations invoke the programmable-priority MemManage fault handler. See the ARMv7-M Architecture Reference Manual for more information.

You can use the MPU to:

  • enforce privilege rules

  • separate processes

  • enforce access rules.