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:
Aug. 19, 2008
Filed:
Jun. 01, 2005
Ryuta Tanaka, Kawasaki, JP;
Toru Tsuruta, Kawasaki, JP;
Ritsuko Tanaka, Kasasaki, JP;
Norichika Kumamoto, Ota, JP;
Ryuta Tanaka, Kawasaki, JP;
Toru Tsuruta, Kawasaki, JP;
Ritsuko Tanaka, Kasasaki, JP;
Norichika Kumamoto, Ota, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A data transfer control system that can change the way of DMA transfers to meet the requirements of each application. The data transfer control system includes a DMA controller (DMAC) and a DMAC memory dedicated for DMA control purposes. The DMAC performs DMA transfers according to a DMA program stored in the DMAC memory. Each time a new DMA request is received, the DMAC saves its parameters in a DMA request parameter table, and each DMA request parameter table is registered with a DMA request management table. In this way, the received DMA requests are queued in the DMA request management table. They are executed in a first-in first-out fashion. The progress of ongoing DMA transfers are managed in a DMA channel status table disposed for each DMA channel.