30.6.12.6 Data Flash Scrambling
When Data Flash scrambling is enabled (DSCC.DSCEN), address and data in the secure portion of the Data Flash are scrambled when written, and de-scrambled when read.
Scrambling and differential operation can be performed on the same data if the tamper row resides in the secure Data Flash area and both are enabled. In this case, the process is serial starting with scrambling, followed by Silent Access on writes and the reverse on reads.