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<p>Embedded systems frequently integrate specify hardware for access protection or system isolation. For example, a Cortex-M33 processor based system may incorporate:</p>
<ul>
<li>SAU (Secure Attribute Unit) to create a secure execution partition with controlled access from a non-secure execution partition.</li>
<li>MPC (Memory Protection Controller) to control the system-wide access permissions to memory.</li>
<li>PPC (Peripheral Protection Controller) to control the system-wide access permissions to pe