Microsemi SmartFusion2 - Table 87 Memory Region Attributes for a Microcontroller

Cortex-M3 Processor (Reference Material)
UG0331 User Guide Revision 15.0 131
3.7.4.9.1 MPU Configuration for a Microcontroller
Usually, a microcontroller system has only a single processor and no caches. In such a system, program
the MPU as indicated in the following table.
In most microcontroller implementations, the shareability and cache policy attributes do not affect the
system behavior. However, using these settings for the MPU regions can make the application code
more portable. The values given are for typical situations. In special systems, such as multiprocessor
designs or designs with a separate DMA engine, the shareability attribute might be important. In these
cases refer to the recommendations of the memory device manufacturer.
Table 87 • Memory Region Attributes for a Microcontroller
Memory region TEX C B S Memory type and attributes
Flash memory b000 1 0 0 Normal memory, Non-shareable, write-through
Internal SRAM b000 1 0 1 Normal memory, Shareable, write-through
External SRAM b000 1 1 1 Normal memory, Shareable, write-back, write-
allocate
Peripherals b000 0 1 1 Device memory, Shareable