Read the MPU Region Base Address Register to determine the base address of the region identified by MPU_RNR. Write to update the base address of said region or that of a specified region, with whose number MPU_RNR will also be updated.
| REGION | On writes, specifies the number of the region whose base address to update provided VALID is set written as 1. On reads, returns bits [3:0] of MPU_RNR. |
| VALID | On writes, indicates whether the write must update the base address of the region identified by the REGION field, updating the MPU_RNR to indicate this new region. 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. |
| ADDR | Base address of the region. |