Datasheet

SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
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12.11.2.3 MPU Region Number Register
Name: MPU_RNR
Access: Read/Write
Reset: 0x00000800
The MPU_RNR selects which memory region is referenced by the MPU_RBAR and MPU_RASRs.
 REGION: MPU Region Referenced by the MPU_RBAR and MPU_RASRs
Indicates the MPU region referenced by the MPU_RBAR and MPU_RASRs.
The MPU supports 8 memory regions, so the permitted values of this field are 0–7.
Normally, the required region number is written to this register before accessing the MPU_RBAR or MPU_RASR. How-
ever, the region number can be changed by writing to the MPU_RBAR with the VALID bit set to 1; see “MPU Region Base
Address Register” . This write updates the value of the REGION field.
31 30 29 28 27 26 25 24
–
23 22 21 20 19 18 17 16
–
15 14 13 12 11 10 9 8
–
76543210
REGION