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:
Nov. 18, 2014
Filed:
Mar. 25, 2008
Masayuki Daito, Kanagawa, JP;
Masayuki Daito, Kanagawa, JP;
Renesas Electronics Corporation, Kawasaki-shi, Kanagawa, JP;
Abstract
In a conventional multiprocessor system, an access right with respect to a shared resource could not be changed in a flexible manner. The present invention provides a multiprocessor system having a first processor element (PE-A) and a second processor element (PE-B), the first processor element (PE-A) and the second processor element (PE-B) independently executing a program, in which the first processor element (PE-A) includes: a central processing unit (CPUa) for performing an operation processing based upon the program; a shared resource () which is shared between the first processor element (PE-A) and the second processor element (PE-B); and a guard unit () for restricting an access request from the second processor element (PE-B) to the shared resource () based upon an access protection range setting value designated by the central processing unit (CPUa).