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Is an ECC code of all 1's possible

Question asked by gpetrowitsch on Apr 19, 2010
Latest reply on Jun 2, 2010 by ystein

Dear all,


I'm using the NAND-Flash controller on the BF548M.

I wonder, whether it is possible, that it generates ECC

codes with all bits set to 1. Or does the algorithm guarantee,

that there area always 0-bits in the ECC codes?


If this was not possible, it would be quite easy to distinguish

an unprogrammed and therefore invalid ECC byte in the spare

area of the NAND-Flash from a valid code.


Thanks & kind regards,