| http://www.w3.org/ns/prov#value | - In the verify operation, in brief, the write operation is effected by serially applying three different kinds of voltages to the word line so as to control the threshold voltage of the memory cell, the two-value (one-bit) write data corresponding to the four-value (two-bit) information to be written are synthesized by a write data conversion circuit (1) for each of the write operations carried out
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