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:
Oct. 08, 2002
Filed:
Jun. 22, 1999
Applicant:
Inventor:
Masaki Yasuhara, Tokyo, JP;
Assignee:
NEC Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/328 ;
U.S. Cl.
CPC ...
G06F 1/328 ;
Abstract
A data transfer control apparatus is disclosed for controlling conflict of data transfer on a data bus connected to a microprocessor through a bridge circuit. The bridge circuit includes a monitoring unit. When an execution instruction for MPC transfer is issued during DMA transfer, the monitoring unit measures a time period over which the data bus is to be occupied with the MPC transfer. When the PCI bus is to be occupied with the MPC transfer for a predetermined time period, the monitoring unit does not suspend the DMA transfer but performs the MPC transfer after the completion of the DMA transfer.