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Nor Flash

ToEr_3927551
New Contributor

KBA223960 gives a good overview how an erase operation in a Cypress NOR flash is working.

However it is not precise about the effects of the power-loss on OTHER sectors.

Depending on the phase of the erase operation interrupted it seems to be possible that over-erased cells are generated in problematic sector.

If the same bit-lines/columns are used for multiple sectors (which I don't know), this could result in a situation that the read operation in other sectors is affected.

So the first question is: Are bit-lines/columns are actually shared between different sectors (256 kByte)?
If yes, then the second question is whether there is a influence of the over-erased cells in one sector to the other sector is possible?

          (and on which sectors - are there sector-groups?)

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1 Solution
SudheeshK
Moderator
Moderator

Hi,

Please find the answer for your queries below.

  1. Over erased cells in one sector will not affect the data in other sectors.
  2. Power interruption during an erase operation in a sector will not affect data in other sectors.

Thanks and Regards,

Sudheesh

View solution in original post

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2 Replies
SudheeshK
Moderator
Moderator

Hi,

Please find the answer for your queries below.

  1. Over erased cells in one sector will not affect the data in other sectors.
  2. Power interruption during an erase operation in a sector will not affect data in other sectors.

Thanks and Regards,

Sudheesh

View solution in original post

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ToEr_3927551
New Contributor

Thanks for this clarification.

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