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:
May. 27, 2008
Filed:
Apr. 21, 2005
Takafumi Fujiwara, Tokyo, JP;
Katsunori Kato, Kanagawa, JP;
Noboru Yokoyama, Tokyo, JP;
Atsushi Date, Tokyo, JP;
Tadaaki Maeda, Kanagawa, JP;
Takafumi Fujiwara, Tokyo, JP;
Katsunori Kato, Kanagawa, JP;
Noboru Yokoyama, Tokyo, JP;
Atsushi Date, Tokyo, JP;
Tadaaki Maeda, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In plural master apparatus connected to a bus, a master apparatus issues, to an arbiter, a request signal requesting the use of the bus after a lapse of a predetermined interval when the use of the bus becomes necessary, while another master apparatus issues, to the arbiter, a request signal requesting the use of the bus immediately when the use of the bus becomes necessary. The arbiter grants a right to use the bus by equally handling the request signals from the master apparatus. Also there is prepared a signal indicating a traffic in the bus, and the request signal is issued after the lapse of the interval in case of a high traffic but it is issued immediately in case of a low traffic. It is thus possible to adjust the practical priority of the but use right in detail or to dynamically change such priority by the presence or absence of such interval or a length thereof.