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:
Mar. 16, 2010
Filed:
Jan. 31, 2005
Makoto Muranushi, Kawasaki, JP;
Masami Kanasugi, Kawasaki, JP;
Shoji Taniguchi, Kawasaki, JP;
Koichi Kuroiwa, Kawasaki, JP;
Norihiro Ikeda, Kawasaki, JP;
Makoto Muranushi, Kawasaki, JP;
Masami Kanasugi, Kawasaki, JP;
Shoji Taniguchi, Kawasaki, JP;
Koichi Kuroiwa, Kawasaki, JP;
Norihiro Ikeda, Kawasaki, JP;
Fujitsu Microelectronics Limited, Yokohama, JP;
Abstract
A semiconductor having an internal memory of the present invention comprises a first memory copying and holding a data held in a storage device; a second memory holding a check code of the data held in the first memory, and being constantly supplied with a source voltage not lower than a data-holding-guarantee voltage; a data check unit detecting error in the data held by the first memory based on the check code; and reloading units copying only the data corresponded to the block having a data error detected therein by the data check unit, from the storage device to the first memory, to make it possible to detect any error in the data held in the first memory to thereby guarantee the data, and to lower the source voltage to be supplied to the first memory.