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. 19, 1993
Filed:
Sep. 14, 1990
Applicant:
Inventors:
Kumar Chinnaswamy, Milford, MA (US);
Hansel A Collins, Clinton, MA (US);
Michael B Evans, Marlborough, MA (US);
Timothy P Fissette, Westminster, MA (US);
Michael A Gagliardo, Shrewsbury, MA (US);
John J Lynch, Wayland, MA (US);
James E Tessari, Arlington, MA (US);
Assignee:
Digital Equipment Corporation, Maynard, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ; G11C / ;
U.S. Cl.
CPC ...
395425 ; 395550 ; 365222 ; 365228 ;
Abstract
Methods and apparatus for immunizing dynamic random access memory (DRAM) modules in the data processing system against data loss from transitions that occur with memory mode switching during the scan operation and permitting normal operations to be performed on the memory modules regardless of the state of the system clocks.