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. 31, 2001
Filed:
Feb. 19, 1998
Applicant:
Inventor:
Isamu Hayashi, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/328 ;
U.S. Cl.
CPC ...
G06F 1/328 ;
Abstract
A data transfer controller (,) decides that both of a host bus (,) and a local bus (,) have been acquired by a bus interface LSI,by the fact that a host bus use permission GNTH from a host bus arbiter (,) and a local bus use permission GNTL from a local bus arbiter (,) are both activated, in which case, the data transfer controller (,) controls a host bus DMA controller (,) and a local bus DMA controller (,) to make selectors SE,and SE,establish a connection between the host bus (,) and the local bus (,) through an inner data path (,) having no buffer. This configuration improves data transfer rate through the host bus (,) and the local bus (,).