2.7.4.4 MPU Region Base Address Register

The MPU_RBAR defines the base address of the MPU region selected by the MPU_RNR, and can update the value of the MPU_RNR. See the register summary in Table 2-71 for its attributes.

Write MPU_RBAR with the VALID bit set to 1 to change the current region number and update the MPU_RNR. The bit assignments are:

Table 2-75. MPU_RBAR Bit Assignments
Bits	Name	Function
[31:N]	ADDR	Region base address field. The value of N depends on the region size. For more information see ADDR Field.
[(N-1):5]		Reserved.
[4]	VALID	MPU Region Number valid bit: Write: 0 = MPU_RNR not changed, and the processor: updates the base address for the region specified in the MPU_RNR ignores the value of the REGION field 1 = the processor: updates the value of the MPU_RNR to the value of the REGION field updates the base address for the region specified in the REGION field. Always reads as zero.
[3:0]	REGION	MPU region field: For the behavior on writes, see the description of the VALID field. On reads, returns the current region number, as specified by the MPU_RNR.