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:
May. 31, 1977
Filed:
Sep. 05, 1975
Koichi Tokura, Ichikawa, JA;
Saburo Kaneda, Yokohama, JA;
Fujitsu Ltd., Kawasaki, JA;
Abstract
An access control unit for controlling a memory device having a plurality of memory units for storing data in a manner whereby the memory units are accessed sequentially, comprises a data register for storing data read out from the memory device, a cycle designation device for indicating in every cycle the memory unit of the memory device to be accessed in the relevant cycle, an address device for providing in each cycle an address to the memory unit indicated by the cycle designation device, a non-coincidence detection circuit for detecting non-coincidence between the memory unit indicated by the address and the memory unit practically provided with that address, and an invalidating device utilizing the output of the non-coincidence detection circuit for invalidating data read out from the memory device in a cycle a specified number of cycles after that in which non-coincidence is detected.