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. 08, 2022
Filed:
Feb. 08, 2021
Renesas Electronics Corporation, Tokyo, JP;
Manabu Koike, Tokyo, JP;
RENESAS ELECTRONICS CORPORATION, Tokyo, JP;
Abstract
A data processor capable of suppressing variation in latency during a bus access is provided. The data processor according to one embodiment includes a ring bus through which a plurality of relay circuits, being coupled to a plurality of bus masters and a plurality of slaves, are coupled in the shape of a ring. Each of the relay circuits includes: an arbitration circuit which arbitrates an adjacent request packet of an adjacent relay circuit and a bus request packet of a nearest bus master with use of priority of these request packets, and outputs the request packet after arbitration to a next relay circuit; and a priority adjustment circuit which adjusts priority of the bus request packet according to the number of relay circuits through which the bus request packet passes before reaching its destination.