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:
Feb. 19, 1985
Filed:
Jun. 23, 1981
Fumihiko Takezoe, Tokyo, JP;
Junichi Fujii, Tokyo, JP;
Fuji Facom Corporation, Tokyo, JP;
Fuji Electric Company Limited, Kanagawa, JP;
Abstract
A data processing system including a data transfer abnormality processing unit in which delays caused by the production of a data transfer abnormality signal during a data transfer cycle period are eliminated. A bus controller, a memory unit and one more data processing units are connected in parallel to a common bus which includes a data transfer abnormality signal line. The bus controller includes a data register which receives data from the common bus, delaying it for one cycle period before applying it to a transfer abnormality check circuit. The transfer abnormality signal produced by the transfer abnormality check circuit is stored in a transfer abnormality setting flip-flop in each data processing circuit with a clock pulse which is produced delayed with respect to a bus use permission signal.