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:
Sep. 12, 2006
Filed:
Oct. 08, 2003
Applicants:
Shinsuke Kato, Kobe, JP;
Kiyoshi Owada, Hirakata, JP;
Inventors:
Shinsuke Kato, Kobe, JP;
Kiyoshi Owada, Hirakata, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 12/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
An arithmetic unit includes a switching deviceand a cache controllerThe switching devicedetermines whether desired data to be read by the CPUis in a RAMand allows, depending on a result of the determination, the CPUto directly read the desired data from a ROMThe cache controllercontrols a cacheso that the RAMis initialized based on cache data corresponding to the desired data stored in the cacheIn an arithmetic unit having a CPU, a cache, RAM, and ROM configured in the above manner, the time required for a startup process is reduced.