Design for Consecutive Testability of System-on-a-Chip with Built-In Self Testable Cores

  • Tomokazu Yoneda
  • Hideo Fujiwara
Part of the Frontiers in Electronic Testing book series (FRET, volume 21)


This paper introduces a new concept of testability called consecutive testability and proposes a designfor-testability method for making a given SoC consecutively testable based on integer linear programming problem. For a consecutively testable SoC, testing can be performed as follows. Test patterns of a core are propagated to the core inputs from test pattern sources (implemented either off-chip or on-chip) consecutively at the speed of system clock. Similarly the test responses are propagated to test response sinks (implemented either off-chip or on-chip) from the core outputs consecutively at the speed of system clock. The propagation of test patterns and responses is achieved by using interconnects and consecutive transparency properties of surrounding cores. All interconnects can be tested in a similar fashion. Therefore, it is possible to test not only logic faults but also timing faults that require consecutive application of test patterns at the speed of system clock since the consecutively testable SoC can achieve consecutive application of any test sequence at the speed of system clock.


consecutive testability consecutive transparency test access mechanism system-on-a-chip design for testability built-in self test 


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Copyright information

© Springer Science+Business Media New York 2002

Authors and Affiliations

  • Tomokazu Yoneda
    • 1
  • Hideo Fujiwara
    • 1
  1. 1.Graduate School of Information ScienceNara Institute of Science and TechnologyIkoma, NaraJapan

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