Matsushita Electric Industrial Co., Ltd.

Satoshi Koutaka

Ikuo Fuchigami

Junji Michiyama

Yoichi Nishida

Tomoo Kimura

Tomonori Kataoka

There is provided a nonvolatile semiconductor memory which is capable of operating stably and performing high-speed access operation. A timing generation means,for generating timing signals which make a memory core unit,perform access operation uses first and second clocks of the same cycle and different phases. The timing generation means,generates timing signals for at least one first-half event among a plurality of read access events, according to the first clock, the phase of which precedes a phases of the second clock, and generates timing signals used for processing the remaining events, according to the second clock.

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Kumamoto, Japan

Satoshi Koutaka