| 摘要 |
One page buffer is connected to one bit line. The page buffer latches program data for a selected memory cell. A plurality of page buffers are connected to a sense amplifier in a read/write circuit through a column gate. In a verify read, read data of a selected column is detected using a sense amplifier used in a normal data read. The read data detected by the sense amplifier, i.e., the verify read result is transferred to the page buffer of the selected column. The value of program data in the page buffer is changed on the basis of the verify read result.
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