Is a
Patent attributes
Current Assignee
0
Patent Jurisdiction
Patent Number
Patent Inventor Names
Mihoko Akiyama0
Futoshi Igaue0
Kenji Yoshinaga0
Masashi Matsumura0
Fukashi Morishita0
Date of Patent
August 5, 2008
0Patent Application Number
117036720
Date Filed
February 8, 2007
0Patent Primary Examiner
Patent abstract
A semiconductor device has a first operation mode and a second operation mode in which power supply with a higher voltage value than that in the first operation mode is provided. The semiconductor device includes a memory portion having memory cells for storing data and a power supply circuit portion supplying a first voltage and a second voltage to the memory portion. The memory portion writes or reads data to or from the memory cells based on the first voltage and the second voltage, and the power supply circuit portion provides a smaller voltage difference between the first voltage and the second voltage in the second operation mode as compared with the voltage difference in the first operation mode.
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