The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 03, 2012
Filed:
Oct. 24, 2008
Shinya Fujioka, Kawasaki, JP;
Yasuyuki Eguchi, Kawasaki, JP;
Shinya Fujioka, Kawasaki, JP;
Yasuyuki Eguchi, Kawasaki, JP;
Fujitsu Semiconductor Limited, Yokohama, JP;
Abstract
The memory system includes a semiconductor memory that has an internal circuit, which operates according to a first power supply voltage, and a memory input/output circuit coupled to the internal circuit and operates according to a second power supply voltage, a first control unit that includes a control input/output circuit, coupled to the memory input/output circuit and operates according to the second power supply voltage, a voltage generating unit that generates the second power supply voltage and changes the second power supply voltage according to a voltage adjustment signal, a clock generating unit that generates the clock signal and changes the frequency of the clock signal according to a clock adjustment signal, and a second control unit that generates the voltage adjustment signal and the clock adjustment signal according to an access state of the semiconductor memory by the first control unit.