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:
Nov. 23, 2004
Filed:
Jun. 27, 2002
Dale E. Gulick, Austin, TX (US);
Siegfried Kay Hesse, Dresden, DE;
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
A DMA (Direct Memory Access) mechanism is provided that may be of improved performance in particular in connection with high-speed packet buses. A transmit DMA engine for outputting read requests for a memory interface and receiving requested data from the memory interface, comprises a data transfer initiating unit for outputting first address data identifying a first memory range. Further, a boundary alignment unit is provided for generating second address data using the first address data, where the second address data identifies a second memory range that differs from the first memory range in at least one boundary. Further a corresponding boundary alignment may be done in a receive DMA engine. The DMA mechanism may be performed in a USB-2 host controller that has HyperTransport capabilities.