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Kinetis家族产品提升EEPROM功能
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To provide enhanced EEPROM functionality， the FlexMemory uses a RAM block （FlexRAM）， a flash
block （FlexNVM）， and EEE state machine. When the EEE functionality is enabled， the FlexRAM becomes
your EEE memory. The FlexRAM address space is where you access all of your EEE data. When the EEE
is accessed， the EEE state machine keeps track of the data and backs it up as data records， stored in some
portion of the FlexNVM used as an E-flash. Using a large block of E-flash to back up the data for a smaller
amount of EEE data allows the FlexMemory EEE implementation to offer extremely high endurance.
The EEE state machine uses 32-bit records to backup data from the EEE into the flash. Sixteen bits of the
record are used for the data， and the other sixteen bits are address and status information about the data.
The data records are written and erased as needed. This means that if a location within the EEPROM has
never been accessed， there will not be a data record for it. This helps to reduce the amount of data that
needs to be backed up and can increase the memory enduran
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