Datasheet

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SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
 SIZE: Size of the MPU Protection Region
The minimum permitted value is 3 (b00010).
The SIZE field defines the size of the MPU memory region specified by the MPU_RNR. as follows:
(Region size in bytes) = 2
(SIZE+1)
The smallest permitted region size is 32B, corresponding to a SIZE value of 4. The table below gives an example of SIZE
values, with the corresponding region size and value of N in the MPU_RBAR.
Note: 1. In the MPU_RBAR; see “MPU Region Base Address Register”
 ENABLE: Region Enable
Note: For information about access permission, see “MPU Access Permission Attributes” .
SIZE Value Region Size Value of N
(1)
Note
b00100 (4) 32 B 5 Minimum permitted size
b01001 (9) 1 KB 10 –
b10011 (19) 1 MB 20 –
b11101 (29) 1 GB 30 –
b11111 (31) 4 GB b01100 Maximum possible size