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:
Jul. 30, 1996
Filed:
Dec. 11, 1992
Tsutomu Minagawa, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A DMA controller having an acceptance circuit, a transfer control circuit and a release ordering circuit. The acceptance circuit receives a temporary bus release request and its withdrawal from an external device, once the DMA controller acquires a bus utility right from a CPU. The transfer control circuit then interrupts bus transfer cycles under operation and holds the bus transfer parameters so as to allow a restarting of the bus transfer cycle after the withdrawal is accepted. The release ordering circuit informs the external device of the permission of temporary bus use. So, buses are temporarily released against the external device by the DMA controller of the present invention without passing through the CPU.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile