Chapter 9 Memory Protection Unit; About The Mpu - ARM Cortex-M3 Technical Reference Manual

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Memory Protection Unit

The Memory Protection Unit (MPU) is a component for memory protection. The

processor supports the standard ARMv7 Protected Memory System Architecture

(PMSA) model. The MPU provides full support for:

protection regions

overlapping protection regions

access permissions

exporting memory attributes to the system.

MPU mismatches and permission violations invoke the programmable-priority

MemManage fault handler. For more information, see Memory Manage Fault Address

You can use the MPU to:

enforce privilege rules

separate processes

enforce access rules.

ARM DDI 0337B