Method of operating nonvolatile memory devices storing randomized data generated by copyback operation
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United States of America Patent
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Mar 24, 2015
Grant Date -
May 16, 2013
app pub date -
Aug 30, 2012
filing date -
Nov 14, 2011
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Abstract
In an operating method for a nonvolatile memory device, first random data is sensed from a source area of the memory cell array, the first random data having been generated using first random sequence data. While sensing the first random data, third random sequence data is loaded to a page buffer circuit, the third random sequence data being generated from the first random sequence data and second random sequence data. A logical operation is performed on the sensed first random data and the third random sequence data in the page buffer circuit to generate second random data, and the second random data is programmed to a target area in the memory cell array different from the source area.
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