User guide

Memory Protection Unit
ARM DDI 0337I Copyright © 2005-2008, 2010 ARM Limited. All rights reserved. 5-3
ID072410 Non-Confidential
5.2 MPU functional description
The attribute bits, TEX, C, B, AP, and XN, of the Region Access Control Register control access
to the corresponding memory region. If an access is made to an area of memory without the
required permissions, then a permission fault is raised. For more information, see the ARMv7-M
Architecture Reference Manual.