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:
Jun. 19, 1979
Filed:
Nov. 01, 1976
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G11C / ;
U.S. Cl.
CPC ...
364200 ; 365222 ;
Abstract
In a refresh control system including a main memory having a volatile memory, at least one processing unit for accessing the main memory, a memory bus for effecting signal transfer between the main memory and the processing unit and a supervision circuit for allotting use of the memory bus in response to a request signal, the refresh control system is characterized by a refresh control circuit for transferring the request signal to the supervision circuit at the time the refresh signal is required and for commanding the initiation of the refresh operation to the main memory in response to a grant signal from the supervision circuit.