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EEPROM emulation Problem

Question asked by vanima.nooshin on Mar 28, 2015
I want to  use the Data flash for my information's , i correctly write and read on this section
but my problem is when i want to write again on the same address i should erase all block but i have other information on that block .

i read the
 (32-bit MCU family built on the embedded Power Architecture.pdf )(RM0017.pdf)
in page 701 on EEPROM Emulation Section Wrote:
The choosen ECC algorithm allows some bit manipulations so that a Double Word can be
rewritten several times without needing an erase of the sector.
how can i do this without erasing hole block and what can i do for this ?

Best Regards