Hello,
If a power failure occurs while erasing a sector of Flash Read-Only Memory (FROM), or while writing to FROM, it can lead to corruption of the flash content. This is because the erase or program operation is an atomic process that, if interrupted, may leave the flash in an undefined state. Depending on when the interruption occurs, you might encounter issues such as double-bit ECC (Error Correction Code) errors, which the system cannot correct.
Similarly, for the MPC5xxx series, a power loss during flash erase or write operations can trigger a Data Storage (DS) interrupt upon power restoration if the program accesses the area that was being erased or written to.
When creating a virtual EEPROM driver, it is important to implement mechanisms to handle such power failure scenarios. This could include checking for flash integrity at startup, implementing a robust error-handling routine, and ensuring that critical data is saved in non-volatile memory with sufficient redundancy to recover from partial writes or erases.
It is also recommended to consult the reference manual for your specific NXP device, as it will provide detailed information on flash memory operations and any device-specific considerations for power failure scenarios.
Best regards,
