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. 14, 2021
Filed:
Mar. 13, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Tadayuki Ito, Yokohama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
In order to allow efficient data communication, an interface device that includes N ports, comprises: a cache memory that is shared by the N ports and includes a plurality of cache tags each of which is allocated to one of the N ports; and N cache determination units corresponding to the N ports. Each of the N cache determination units comprises: a determiner configured to determine, based on all of the values of the plurality of cache tags, whether a cache miss has occurred in the cache memory, and an update unit configured to update, when the determiner determines that a cache miss has occurred, cache tag values allocated to a self-port.