Solved! Go to Solution.
Hi,
overstress is not the only thing to consider. Next important point is ECC. Each phrase has hidden ECC syndrome which is programmed to the flash at the same time as data. If you are going to overwrite the phrase, new ECC syndrome corresponding to new data is calculated and ECC is programmed again. And it may be necessary to change '0' in old ECC syndrome to '1' which doesn't work, of course. It can lead to single or multiple bit ECC error.
So, it is possible to overwrite non-erased phrase but it's not recommended. And because this was not characterized, we can't give you guarantees.
Regards,
Lukas
Hi,
overstress is not the only thing to consider. Next important point is ECC. Each phrase has hidden ECC syndrome which is programmed to the flash at the same time as data. If you are going to overwrite the phrase, new ECC syndrome corresponding to new data is calculated and ECC is programmed again. And it may be necessary to change '0' in old ECC syndrome to '1' which doesn't work, of course. It can lead to single or multiple bit ECC error.
So, it is possible to overwrite non-erased phrase but it's not recommended. And because this was not characterized, we can't give you guarantees.
Regards,
Lukas