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:
Dec. 11, 2007
Filed:
Nov. 16, 2004
Wolfgang Spirkl, Germering, DE;
Ralf Arnold, Poing, DE;
Wolfgang Spirkl, Germering, DE;
Ralf Arnold, Poing, DE;
Infineon Technologies, AG, Neubiberg, DE;
Abstract
Transfer switching devices, which supplement unidirectional input switching arrangements or pad circuits are employed to route an internal test signal to the input of an input driver in the unidirectional input switching arrangement and to couple the internal test signal to an internal switching logic unit. The transfer switching devices are controlled via a multiplexer unit, which can be programmed directly using boundary scan registers. The present invention allows all unidirectional pad circuits or input drivers to be tested in the course of a reduced I/O test method for semiconductor circuits, in which testing internal circuits in the semiconductor circuit involves only a subset of the signal connections associated with the input drivers being coupled to a test apparatus.