Carl-Daniel Hailfinger wrote: > For optimal partial reflashing, we have to find out which parts of the > chip can be written without erase. For that, the only criterion (except > a limit on the number of writes for very old chips) is whether the write > will only clear bits (set them to 0). > If (current&new==new) we can skip the erase. > If any bit would have to be set to 1, we need to erase. > > Is that sufficient? Ie is it always ok to skip an erase if we're only clearing bits?
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