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:
Apr. 10, 2012
Filed:
Jul. 14, 2009
Yuichi Ogawa, Kawasaki, JP;
Yuichi Ogawa, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A data transfer device for performing direct memory access (DMA) transfer of data stored in a storage unit to a plurality of other devices includes: a plurality of channel units arranged to correspond to the other devices, the channel units retaining DMA transfer instructions, and outputting number of the DMA transfer instructions retained; a plurality of priority controllers for determining priorities of the channel units on the basis of the number of the DMA transfer instructions retained in the channel units, respectively; an arbiter for selecting one of the DMA transfer instructions retained in one of the channel units on the basis of the priorities determined by the priority controller; and a data transfer processor for performing DMA transfer of data stored in the storage unit to one of the other devices in accordance with the DMA transfer instruction selected by the arbiter.