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. 29, 2011
Filed:
Feb. 16, 2010
Masakazu Ehama, Sagamihara, JP;
Kazuhiko Tanaka, Fujisawa, JP;
Koji Hosogi, Yokohama, JP;
Hiroaki Nakata, Kawasaki, JP;
Masakazu Ehama, Sagamihara, JP;
Kazuhiko Tanaka, Fujisawa, JP;
Koji Hosogi, Yokohama, JP;
Hiroaki Nakata, Kawasaki, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
An external bus interface method including: receiving, via an access control unit, an access request conveyed through an external bus, and judging, via an access judging unit connected to the access control unit, whether the access request is to be honored or rejected, wherein upon receiving the access request, the access control unit sends to the access judging unit an access judging check request signal asking whether the requested address falls within one of access-permitted areas registered in the access judging unit, the access judging unit checks whether the requested address falls within one of the access-permitted areas registered in it and returns to the access control unit, an access judging check result signal indicating whether the access request is to be honored or rejected, and if the access judging check result signal indicates that the access request is to be rejected, the access control unit nullifies the access request.