80C31BH, 80C51BH,80C51BHP, 87C

The 80C31BH, 80C51BH, 80C51BHP, 87C51 may contain design defects or errors
known as errata. Characterized errata that may cause the 80C31BH, 80C51BH,
80C51BHP, 87C51’s behavior to deviate from published specifications are documented in this specification update.
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