SoC Testing Using LFSR Reseeding, and Scan-Slice-Based TAM Optimization and Test Scheduling

Provided by: edaa
Topic: Hardware
Format: PDF
The authors present a SoC testing approach that integrates test data compression, TAM/test wrapper design, and test scheduling. An improved LFSR reseeding technique is used as the compression engine. All cores on the SoC share a single on-chip LFSR. At any clock cycle, one or more cores can simultaneously receive data from the LFSR. Seeds for the LFSR are computed from the care bits from the test cubes for multiple cores. They also propose a scan-slice-based scheduling algorithm that tries to maximize the number of care bits the LFSR can produce at each clock cycle, such that the overall test application time is minimized.

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