Datasheet

F28M36P63C, F28M36P53C, F28M36H53C, F28M36H53B, F28M36H33C, F28M36H33B
SPRS825C –OCTOBER 2012–REVISED FEBRUARY 2014 www.ti.com
3.19.4 CRC Calculation for Data Stored In Secure Memory
This device has dual-zone security for the Cortex-M3 subsystem. Since ZoneX (X → 1/2) software does
not have access to program/data in ZoneY (Y → 2/1), code running from ZoneX cannot calculate CRC on
data stored in ZoneY memory. Similarly, in the case of Exe-Only flash sectors, even though software is
running from same secure zone, the software cannot read the data stored in Exe-Only sectors. However,
hardware does allow CRC computation on data stored in Exe-Only flash sectors as long as the read
access for this data is initiated by code running from same secure zone. These reads are just dummy
reads and, in this case, read data only goes to the µ CRC module, not to the CPU.
90 Device Overview Copyright © 2012–2014, Texas Instruments Incorporated
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