Reading/programming the embedded Flash memory PM0075
22/31 Doc ID 17863 Rev 1
(FLASH_WRPR). Each option byte also has its complement in the information block. During
option loading, by verifying the option bit and its complement, it is possible to check that the
loading has correctly taken place. If this is not the case, an option byte error (OPTERR) is
generated. When a comparison error occurs the corresponding option byte is forced to
0xFF. The comparator is disabled when the option byte and its complement are both equal
to 0xFF (Electrical Erase state).
All option bytes (but not their complements) are available to configure the product. The
option registers are accessible in read mode by the CPU. See Section 3: Register
descriptions for more details.
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