On 22/12/2013 06:25, Andre Abelian wrote:
> Hi All,
>=20
> I have to write to flash memory 2 pocket of data one of them is always 14=
 bytes and the second one may very 110-128 bytes of data. the way flash mem=
ory works is
> I can't rewrite like EEPROM is. in order to rewrite entire sector needs t=
o be erased and after erase all cells becomes logic 1.=20

Does your flash chip distinguish between PAGE WRITE and PAGE PROGRAM
commands?

Some do not need you to rewrite all of the bytes in a page.  I posted an
answer elsewhere that might be useful to you if your flash chip is similar:

http://electronics.stackexchange.com/questions/86019/how-to-read-write-in-m=
25pe80-using-pic18f67k22-controller/86093#86093

David
--=20
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