Framework for testing core-based systems-on-a-chip

Srivaths Ravi, Ganesh Lakshminarayana, Niraj K. Jha

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


Available techniques for testing core-based systems-on-a-chip (SOCs) do not provide a systematic means for synthesising low-overhead test architectures and compact test solutions. In this paper, we provide a comprehensive framework that generates low-overhead compact test solutions for SOCs. First, we develop a common ground for addressing issues such as core test requirements, core access and test hardware additions. For this purpose, we introduce finite-state automata for modeling tests, transparency modes and test hardware behavior. In many cases, the tests repeat a basic set of test actions for different test data which can again be modeled using finite-state automata. While earlier work can derive a single symbolic test for a module in a register-transfer level (RTL) circuit as a finite-state automation, this work extends the methodology to the system level, and, additionally contributes a satisfiability-based solution to the problem of applying a sequence of tests phased in time. This problem is known to be a bottleneck in testability analysis not only at the system level, but also at the RTL. Experimental results show that the system-level average area overhead for making SOCs testable with our method is only 4.4%, while achieving an average test application time reduction of 78.5% over recent approaches. At the same time, it provides 100% test coverage of the precomputed test sets/sequences of the embedded cores.

Original languageEnglish (US)
Pages (from-to)385-390
Number of pages6
JournalIEEE/ACM International Conference on Computer-Aided Design, Digest of Technical Papers
StatePublished - 1999
EventProceedings of the 1999 IEEE/ACM International Conference on Computer-Aided Design (ICCAD-99) - San Jose, CA, USA
Duration: Nov 7 1999Nov 11 1999

All Science Journal Classification (ASJC) codes

  • Software
  • Computer Science Applications
  • Computer Graphics and Computer-Aided Design


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