DFT guidance through RTL test justification and propagation analysis

  • Authors:
  • Yiorgos Makris;Alex Orailaglu

  • Affiliations:
  • -;-

  • Venue:
  • ITC '98 Proceedings of the 1998 IEEE International Test Conference
  • Year:
  • 1998

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Abstract

We introduce a formal mechanism for capturing testjustification and propagation related behavior of blocks.Based on the identified test translation behavior, an RTLtestability analysis methodology for hierarchical designs isderived. An algorithm for pinpointing the local-to-globaltest translation controllability and observabilitybottlenecks is presented. The analysis results are validatedthrough an ATPG-based experimental flow and theapplicability of the scheme for addressing test challengesin large designs by guiding DFT decisions is discussed.