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. 28, 1999
Filed:
Jun. 26, 1997
Applicant:
Inventor:
Satoru Sonobe, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
710 27 ; 710 28 ;
Abstract
To increase access speed, a single-chip computer system having a direct memory access (DMA) mode, includes a central processing unit (CPU) for executing instructions, a first bus connected to the CPU, a memory array connected to the first bus, for storing data, a buffer connected to the first bus, a second bus connected to the buffer, and a communication circuit, connected to the second bus, for receiving and outputting data. The buffer connects the first bus to the second bus when the DMA mode is executed, and disconnects the first bus from the second bus when the DMA mode is not executed.