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:
Jan. 02, 1979
Filed:
Dec. 23, 1974
Applicant:
Inventor:
Claudio Gentili, Cornaredo (Milan), IT;
Assignee:
Honeywell Information Systems Italia, Caluso, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ;
U.S. Cl.
CPC ...
365222 ; 365203 ;
Abstract
A semiconductor memory is provided with means for refreshing the memory. Interrupt requests generated by the memory initiate refreshing cycles which are uniformly distributed during periods of normal operation of the memory, each cycle for a row of the memory. In a first time interval, an interrupt request has a low priority level and does not necessarily interrupt the operation of the computer. If the low priority interrupt request is not responded to, a second interrupt request with a high priority level is generated; this high priority level second interrupt request is responded to without fail.