Integrated circuit memory with common address register and decoder

摘要

An integrated circuit memory which can be applied, for example, to a memory device of a dialogue type tool information interface for an NC machine tool or a memory unit of various identification cards, comprises a fixed memory unit where necessary information is fixedly stored and the information cannot be rewritten, and a rewrite memory unit where necessary information among information of various sorts supplied from the interface or the card read/write apparatus can be rewritten if necessary, and the fixed memory unit and the rewrite memory unit are integrated in one chip or a single body of one module.