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:
Sep. 09, 2014
Filed:
Oct. 08, 2011
Himanshu Kukreja, New Delhi, IN;
Deepak Agrawal, Ghaziabad, IN;
Himanshu Kukreja, New Delhi, IN;
Deepak Agrawal, Ghaziabad, IN;
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A circuit for reducing peak power during transition fault testing of an integrated circuit (IC) includes a programmable register that receives scan shift and SDI (scan data in) signals. Input and output ports of the programmable register are connected together. A multiplexer is provided that has a first input port that is maintained asserted, and a second input port connected to the output port of the programmable register. A scan shift signal, which remains asserted during a scan shift operation and de-asserted during a scan capture operation, is provided at a select input port of the multiplexer. The output of the multiplexer is provided as an input to a clock gating cell. The clock gating cell selectively provides the clock signal to the scan-chain flip-flops in the IC based on the scan shift signal and a functional enable signal, and reduces peak power during transition fault testing.