| 摘要 |
A sense amplifier band placed between two memory cell arrays includes: equalize circuits equalizing bit line pairs of the first memory cell array; and equalize circuits equalizing bit line pairs of the second memory cell array; and in addition, equalize circuits for initializing sense amplifiers. The sense amplifiers are initialized by equalize signals in pulse in response to an instruction of activation of one word line of the first and second memory cell arrays. Therefore, since data read out in the previous time is held in the sense amplifier, the data held in the sense amplifier can be read out at high speed without activation of a word line.
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