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

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