The Definitive Guide to ARM® Cortex®-M3 and Cortex®-M4 Processors, 3rd Edition

Chapter 11

Memory Protection Unit (MPU)

Abstract

This chapter explains the usage of the MPU, the programmer’s model, features and how to configure the MPU. A comparison between the MPU in the ARM^® Cortex^®-M3/M4 processors and Cortex-M0+ processor is also covered.

Keywords

MPU; region; attributes; permission; sub-region disable; alias; OS; background region

Chapter Outline

11.1 Overview of the MPU

11.1.1 About the MPU

11.1.2 Using the MPU

11.2 MPU registers

11.2.1 MPU type register

11.2.2 MPU control register

11.2.3 MPU region number register

11.2.4 MPU region base address register

11.2.5 MPU region base attribute and size register

11.2.6 MPU alias registers

11.3 Setting up the MPU

11.4 Memory barrier and MPU configuration

11.5 Using sub-region ...