SAM3A4C Atmel Corporation, SAM3A4C Datasheet - Page 208

• Manufacturer Part Number: SAM3A4C
• Manufacturer: Atmel Corporation

11.23.9.1
208
208
SAM3X/A
SAM3X/A
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 follows:
Table 11-40. Memory region attributes for a microcontroller
In most microcontroller implementations, the share ability 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 share ability attri-
bute might be important. In these cases refer to the recommendations of the memory device
manufacturer.
Memory region
Flash memory
Internal SRAM
External SRAM
Peripherals
TEX
b000
b000
b000
b000
C
1
1
1
0
B
0
0
1
1
S
0
1
1
1
Memory type and attributes
Normal memory, Non-shareable, write-through
Normal memory, Shareable, write-through
Normal memory, Shareable, write-back, write-allocate
Device memory, Shareable
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12