Fujitsu FR81S Manuel D’Utilisation
CHAPTER 3: CPU
10. Memory Protection Function (MPU)
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CHAPTER : CPU
FUJITSU SEMICONDUCTOR CONFIDENTIAL
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10.4.1.
Setting Up Memory Protection Areas
The setting up memory protection areas of the CPU is shown below.
The memory protection function is configured by settings whether instructions, data reads, and data writes
are permitted or forbidden in privilege mode and user mode for a maximum of eight protection areas
specified by address and size, and default areas that are not contained in these protection areas. The buffer
permitted or forbidden setting can also be configured for each area at the same time.
If there are overlaps between specified protection areas, the area with the smallest number takes precedence.
When the memory protection function is disabled (MPUCR.MPE =0), access is performed with access
permitted to all areas and buffering disabled.
MB91520 Series
MN705-00010-1v0-E
143