Hi Edgar mosqueda,
This question is the same as the case, and I already reply you in the case.
Please note, K64FN1M0 chip don't have the flexNVM module, it just have the Pflash, it doesn't have the EEPROM function.
So, you need to store the data in the flash according address directly, just operate the flash, not the EEPROM.
K64FN1M0 don't have eeprom function.
K64FX512XX have the flexNVM and the eeprom function.
EEERDY bit for devices without FlexNVM is reserved.

Wish it helps you!
Have a great day,
Kerry
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