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:
Aug. 18, 2009
Filed:
Sep. 26, 2006
Tetsu Hasegawa, Yokohama, JP;
Chikako Tokunaga, Yokohama, JP;
Tetsu Hasegawa, Yokohama, JP;
Chikako Tokunaga, Yokohama, JP;
Kabushiki Kaisha Toshiba, Minato-ku, Tokyo, JP;
Abstract
A semiconductor integrated circuit has a memory circuit having memory cells, a first register, a second register, a register selection circuit having an input to which an output of the first register and an output of the second register are connected, a memory bypass circuit which is located between a first switching circuit and a second switching circuit, and connected to the inputs and the outputs of the memory circuit. The register selection circuit is switched to the output signals of the first register when performing testing by way of the memory circuit, and switched to output signals of the second register when performing testing by way of the memory bypass circuit.