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. 03, 1996
Filed:
Jul. 15, 1994
Takayuki Kimura, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Comprising a data memory region (21) for data and pointer memory sections (23) for pointers controlling transfer of the data to or from an I/O device for a CPU, a memory (13) for DMA comprises in each pointer memory section a one-bit memory area for a discrimination or skip bit (Bi) indicative of whether the transfer should proceed or be skipped at one of the data that is controlled by the pointer stored in the pointer memory section under consideration. Preferably, the discrimination bit represents binary zero and one values when the transfer should proceed and be skilled, respectively. It is preferred to form a DMA controller together with the memory in an LSI semiconductor device.