16.3.6 Dual ECC Checkers in Lockstep

Critical parts of the ECC checker logic are performed by duplicated lockstep circuitry. A mismatch between the duplicated circuitry in this lockstep logic will set the COMP flag in the INTFLAGSB register.

The ECC encode logic in NVMCTRL is not duplicated. Correctness of written data (and ECC) can be verified, if needed, by a read-back which will pass through the duplicated ECC decode logic. Any error during a write will be automatically detected and flagged when the Flash or EEPROM location eventually is read back.