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:
Mar. 30, 1999
Filed:
Mar. 28, 1996
Applicant:
Inventors:
Michael R Miller, Austin, TX (US);
Nancy G Woodbridge, Austin, TX (US);
Thomas A Volpe, Austin, TX (US);
James G Gay, Austin, TX (US);
Assignee:
Motorola, Inc., Schuamburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A06F / ;
U.S. Cl.
CPC ...
711105 ; 364D / ;
Abstract
An external bus master (205) accesses a DRAM (207) using a memory controller (804) internal to a data processor (3) without the use of external multiplexers or any other external circuitry. The need for external multiplexers and even a dedicated integrated circuit pin for providing external control during external master initiated DRAM accesses is removed by the implementation of a circuit and technique for multiplexing row and column addresses of the DRAM internally within the data processor.