| 摘要 |
PURPOSE: To reduce the consumption power of a semiconductor device by giving only first potential to a first source line in the case of a source operation request and giving second potential that is lower than the first potential to the first source line, and giving the first potential to the first source line after write data has been given to a pair of bit lines. CONSTITUTION: In response to a write operation request, signals LDVDDi and /LVDDi for reducing potential become high and low levels, respectively, and a lower power supply potential VDD2 than power supply potential VDD1 is given to a sense power supply line 141nb that has been charged to the supply voltage VDD1. After that, when write data is given to a pair of bit lines 141a, the signals LVDDi and/LVDD1 for reducing potential become low and high levels, respectively, before a selected word line 141 d is reset, thus giving the supply voltage VDD1 to the sense power supply line 141nb.
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