Program cycle skip evaluation before write operations in non-volatile memory
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United States of America Patent
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Feb 3, 2015
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app pub date -
Mar 15, 2013
filing date -
Mar 15, 2013
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Abstract
A non-volatile memory system is disclosed that evaluates during a read before write operation whether to skip programming of portions of group of memory cells during a subsequent write operation. By evaluating skip information during a read before write operation, the write operation can be expedited. The additional overhead for evaluating skip information is consumed during the read before write operation. By performing a skip evaluation during the read before write operation, a full analysis of the availability of skipping programming for memory cells can be performed. Skip evaluations in different embodiments may be performed for entire bay address cycles, column address cycles, and/or sense amplifier address cycles. In some embodiments, some skip evaluations are performed during read before write operations while others are deferred to the write operation. In this manner, the number of data latches for storing skip information can be decreased.
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