Semiconductor memory device
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United States of America Patent
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Sep 20, 2005
Grant Date -
Jun 17, 2004
app pub date -
Jul 29, 2003
filing date -
Jul 30, 2002
priority date (Note) -
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Abstract
A semiconductor memory device is provided, which comprising a memory cell array comprising a two-value memory region and a multi-value memory region, in which the two-value memory region comprises a plurality of memory cells each storing 1-bit data and the multi-value memory region comprises a plurality of memory cells each storing 2 or more-bit data, and a sense amplifier section common to data read of the two-value memory region and data read of the multi-value memory region, for reading data stored in a selected memory cell by comparing a potential of the selected memory cell with a reference potential.
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