Importance

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Abstract

Disclosed heroin is a device that includes a plurality of memory circuits and a refresh control circuit configured to generate a plurality of refresh initiation signals such that one of the refresh initiation signals takes an active level. Each of the memory circuits comprises a memory cell array including a plurality of memory cells, at least one data terminal, a data read/write circuit performing a data read operation to read out read-data from a selected one of the memory cells and supply the read-data to the data terminal and a data write operation to receive write-data from the data terminal and write the write-data into a selected one of the memory cells, and a refresh circuit performing a data refresh operation on selected one or ones of the memory cells of the memory cell array in response to an associated one of the refresh initiation signals taking the active level.

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First Claim