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:
Sep. 18, 2001
Filed:
Oct. 01, 1998
Masafumi Takahashi, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A DMA controller having a highly-functional, widely applicable construction, which enables data transfer of a more complicated data region in a single transfer operation, includes an address-continuous transfer end determining portion which determines the end of current data transfer in a region where addresses of data to be transferred are continuous (address-continuous region) contained in an address-continuous region of data to be transferred, and outputs an address-continuous region transfer end signal; an address generating portion which renews and outputs addresses contained in the address-continuous region for transferring data therefrom sequentially from the leading address, and successively effects similar renewal and output of addresses for a plurality of address-continuous regions in response to the address-continuous region transfer end signal; and a data transfer end deciding portion which determines the end of data transfer of a final address-continuous region among all address-continuous regions contained in an address region of data to be transferred, and outputs a data transfer end signal.