Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Renesas Electronics/R7FA2A1AB/MMPU/MMPUEA1#0x0
Group A Region 1 End Address Register
Region end address registerAddress where the region end, for use in region determination.NOTE: The low-order 2 bits are fixed to 1.
These bits are read as 11. The write value should be 11.
https://github.com/cmsis-svd/cmsis-svd-data