Provides indirect read and write access to the limit address of the currently selected MPU region selected by MPU_RNR[7:2]:(1[1:0]) `FTSSS
| EN | Region enable |
| ATTRINDX | Associates a set of attributes in the MPU_MAIR0 and MPU_MAIR1 fields |
| LIMIT | Contains bits [31:5] of the upper inclusive limit of the selected MPU memory region. This value is postfixed with 0x1F to provide the limit address to be checked against |