| 摘要 |
PROBLEM TO BE SOLVED: To increase redundant operation speed by providing a plurality of memory cells being arranged so that the memory cells correspond to a plurality of memory blocks, by providing a plurality of block sensing amplifiers being arranged so that the block sensing amplifiers correspond to a plurality of memory blocks, and by generating a sensing amplification control signal, a column selection signal, and a row selection signal when a selected row is defective. SOLUTION: Block sensing amplification circuits BSA1-BSAn sense and amplify information in a memory block where a corresponding block sensing amplification circuit is selected when one of the block sensing amplification circuits is selected. The read/write operation of information to the memory cell of an arbitrary row in a memory block BLK1 is performed, a main word line that is related to a defective memory cell is selected by a column decoder 130, and one of the main word line and a selected sub word line is selected by SWD: 120. The row of the defective memory cell is replaced by a redundant row by a selection signal from a redundant controller 200.
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