Hardware Output Response Analysis

Output response analysis techniques:

  • Comparison with expected output sequence (on-line or post-mortem). Expected output may be recorded on defect-free system or system model
  • Data compaction (signature analysis)
  • Statistical analysis
  • Custom built algorithm (may be based on state machine or other system model)

Linear Feedback Shift Register (LFSR) as Signature Analyzer

Signature Analyzer

Probability of aliasing is 2-k , where k is the signature length. For k = 16 probability is only 106

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