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:
Mar. 16, 2004
Filed:
Feb. 26, 1999
James D. Gallia, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A scan circuit ( ) has a scan data input ( ), a normal data input ( ), a clock input ( ), a scan enable input ( ), a normal data output ( ), and a scan data output ( ). The scan circuit includes a multiplexer ( ) having two data inputs respectively coupled to the scan data input and normal data input of the scan circuit, having a control input coupled to the scan enable input of the scan circuit, and having an output. The scan circuit also includes a D-type flip-flop ( ) having a data input coupled to the output of the multiplexer, having a clock input coupled to the clock input of the scan circuit, and having a data output serving as the normal data output of the scan circuit. The scan circuit further includes a gate ( ) having a first input coupled to an output of the flip-flop, having a second input coupled to the scan enable input of the scan circuit, and having an output which serves as the scan data output of the scan circuit.