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. 27, 1992
Filed:
Jul. 25, 1991
Applicant:
Inventors:
Joseph B Wicklund, Bothell, WA (US);
Ward D Parkinson, Boise, ID (US);
Assignee:
Micron Technology, Inc., Boise, ID (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395425 ; 3652385 ; 3642543 ; 364D / ; 3649571 ; 364D / ;
Abstract
A DRAM controller uses logic to selectively enable or disable a page mode of operation as a result of specific instructions from executing software, or upon some prediction of page mode efficiency based on past performance. An address multiplexer generates separate row and column addresses from the CPU address control lines, and to generate the necessary signals to control the timing of the RAS and CAS control signals that operate the DRAM. Page mode is automatically turned on or off based on a prediction of whether or not the next access will be at the same DRAM row address as the last one.