Embedded self-testing checkers for low-cost arithmetic codes

  • Authors:
  • Steffen Tarnick;Albrecht P. Stroele

  • Affiliations:
  • -;-

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

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Abstract

In highly reliable systems, error detecting codes are employed and errors caused by faultyhardware are indicated on-line by code checkers. Wepresent two novel architectures of embedded self-testingcheckers for low-cost arithmetic codes, one based oncode word generators and adders, the other based oncode word accumulators. In these schemes, the codechecker receives all possible code words but one, irrespective of the number of different code words that areproduced by the circuit under check (CUC). So anycode checker can be employed that is self-testing forall or a particular subset of code words, and the structure of the code checker need not be tailored to the setof code words produced by the CUC. The proposed codeword generators and accumulators are built from simple standard hardware structures, counters and end-around-carry adders. They can also be utilized in anoff-line BIST environment as pattern generators andtest response compactors.