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:
Jul. 04, 1995
Filed:
Feb. 18, 1994
Yukihiro Fujimoto, Yokohama, JP;
Tsuguo Kobayashi, Sunnyvale, CA (US);
Kazutaka Nogami, Palo Alto, CA (US);
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
There is disclosed a data input/output control circuit comprising: an input/output circuit for carrying out input of data from the exterior or output of data thereto; and an output circuit such that when the input/output circuit carries out output of data, it delivers, to the input/output circuit, data generated in the exterior and transferred by way of a signal line, while when the input/output circuit carries out input of data, it allows the node between the input/output circuit and the signal line to be placed in high impedance state. In this control circuit, the output circuit includes a switching element and a discharge element connected in series between the signal line and the input/output circuit. The switching element is operative in such a manner that when the input/output circuit carries out output of data, it is closed, while when the input/output circuit carries out input of data, it is opened. In addition, the discharge element is operative in such a manner that when the input/output circuit carries out output of data, it is inoperative, while when the input/output circuit carries out input of data, it discharges the node the switching element and the input/output circuit, thus placing the node between the input/output circuit and signal line in high impedance state.