hard20 pts · first answer countsflash-memoryreliability

Settings lost on power cut

If power fails while settings are being written to flash, the device boots with corrupted configuration. Which design is robust?

A.Keep two copies in separate sectors, each with a sequence number and CRC, write the older one, and on boot use the newest valid copyB.Write the settings twice to the same sectorC.Add a large capacitor and hope it is enoughD.Write settings only when the user presses save

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