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. 28, 2006
Filed:
Jun. 07, 2002
Applicant:
Mamoru Sakugawa, Tokyo, JP;
Inventor:
Mamoru Sakugawa, Tokyo, JP;
Assignee:
Renesas Technology Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 13/28 (2006.01); G06F 11/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
A DMA controller comprises an arbitration unit for arbitrating among a plurality of channels so as to select a DMA request from among a plurality of DMA requests accepted by way of the plurality of channels according to priorities assigned to the plurality of channels in advance, and a trace buffer for storing trace data associated with the DMA request selected by the arbitration unit. The DMA controller can also include a write control unit for enabling or disabling writing of the trace data associated with the DMA request selected by the arbitration unit in the trace buffer.