How deviations of a shipped or sampled device from its published specification are confirmed, classified, given workarounds, published to customers and tracked through each silicon revision. Errata are a promise of honesty to customers: the errata document says what does not work as specified, under which conditions, how to avoid it and whether a later revision fixes it.
A reported deviation is confirmed, classified and given a workaround; customer-visible errata are published and delivered, internal ones recorded, and every erratum is tracked through each silicon revision.
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