8.5.3 Region Start and End Address Registers

The region n descriptor registers, PRxST and PRxEND, define the start address offset and end address offset for the region. The address offsets are on four Kbyte Flash page boundaries. The address offsets are an offset from the beginning of either the selected user program partition or user data Flash.

If the start address is greater than the end address, then the region size is zero and the region access controls do not apply to any portion of Flash.

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