Memory device with reduced power consumption when byte-unit accessed

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United States of America Patent

PATENT NO 6252807
SERIAL NO

09457529

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A memory device is arranged in such a manner that an access-target memory cell is selected from a plurality of memory cells in accordance with the level of the byte-enable signal at the timing when the level of the corresponding row address strobe signal (/RAS signal) changes, and by this arrangement, the problem resided in the conventional memory device that it could not be decided as to whether a memory block in the DRAM core was to be a selected or non-selected byte until the fall of the corresponding column address strobe signal (/CAS signal), and thus the column decoder and the preamplifier that start operating at the fall of the /RAS signal could not be efficiently controlled is solved, and due to this, electric power that might otherwise be consumed at the time of executing a byte-unit access to the wide-bus DRAM can be reduced.

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Patent Owner(s)

Patent OwnerAddress
RENESAS ELECTRONICS CORPORATIONTOKYO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sonpachi, Haruko Tokyo, JP 1 64
Suzuki, Tomoaki Tokyo, JP 92 738

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