Patent · US Active

Launch-on-shift support for on-chip-clocking

US7882410B2 · kind B2 · utility

6Cited by
0References
22Claims
0Family size

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Inventors

Key dates

Filing dateJun 25, 2007
Grant dateFeb 1, 2011
Priority date—
Expiry dateJun 24, 2029

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01R31/318594
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A method to perform launch-on-shift scanning for integrated circuits having multiple clock domains is presented. An integrated circuit includes both capture clock domains and non-capture clock domains. The portions of the test vectors for non-capture clock domains are shifted into the scan chains of the non-capture clock domains and allowed to settle prior to the last shift launch cycle and the capture cycle of the capture clock domains. Thus, the ambiguity of the timing between the non-capture domains and the capture domains caused by asynchronous clock signals is eliminated.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.