Micron Technology, Inc.
APPARATUS FOR DETERMINING DATA STATES OF MEMORY CELLS

Abstract:

Memory having a controller configured to cause the memory to determine a respective raw data value of a plurality of possible raw data values for each memory cell of a plurality of memory cells, count occurrences of each raw data value for a first set of memory cells of the plurality of memory cells, store a cumulative number of occurrences for each raw data value, determine a plurality of valleys of the stored cumulative number of occurrences for each raw data value with each valley corresponding to a respective raw data value of the plurality of possible raw data values, and, for each memory cell of a second set of memory cells of the plurality of memory cells, determine a data value for that memory cell in response to the raw data value for that memory cell and the respective raw data values of the plurality of valleys.