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. 23, 2003
Filed:
Nov. 09, 2000
Kazuhito Koguchi, Yamanashi, JP;
NEC Corporation, , JP;
Abstract
When a high-level bus converter receives a normal request from any one of a plurality of intermediate-level bus converters, the high-level bus converter converts the normal request into a retry response and sends the retry response to the intermediate-level bus converter, if a normal response buffer is busy. When the high-level bus converter receives an urgent request, the high-level bus converter sends a normal response in response to the urgent request to the intermediate-level bus converter. Each of a plurality of low-level bus converters issues a normal request, converts, when a retry response is received, the retry response into an urgent request, and reissues a request as the urgent request. When a plurality of urgent requests compete with each other for being processed, each of the plurality of intermediate-level bus converters arbitrates among the plurality of urgent requests, and directly transfers a winner urgent request to the high-level bus converter. Each of the plurality of intermediate-level bus converters converts at least one looser urgent request into a normal request and transfers the normal request to the high-level bus converter.