| 摘要 |
PROBLEM TO BE SOLVED: To easily obtain multilevel data stored in a memory element (DRAM).SOLUTION: Control is performed of the amount of charge accumulated in a capacitor of a memory element (DRAM) by changing the potential of a wiring (a bit line), which is used for writing data to the memory element, in a period in which a transistor included in the memory element is on. Therefore, multilevel data stored in the memory element can be obtained without a complex configuration of a semiconductor device including the memory element.SELECTED DRAWING: Figure 1 |
