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Constraint-Driven Test Scheduling for NoC-Based Systems

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2 Author(s)
E. Cota ; Univ. Fed. do Rio Grande do Sul, Porto Alegre ; C. Liu

On-chip integrated network, the so-called network-on-chip (NoC), is becoming a promising communication paradigm for the next-generation embedded core-based system chips. The reuse of the on-chip network as test access mechanism has been recently proposed to handle the growing complexity of testing NoC-based systems. However, the NoC reuse is limited by the on-chip routing resources and various constraints. Therefore, efficient test-scheduling methods are required to deliver feasible test time while meeting all the constraints. In this paper, the authors propose a comprehensive approach to test scheduling in NoC-based systems. The proposed scheduling algorithm is based on the use of dedicated routing path that is suitable for nonpreemptive test. The algorithm is improved by incorporating both preemptive and nonpreemptive tests. In addition, BIST, precedence, and power constraints were taken into consideration. Experimental results for the ITC'02 system-on-chip benchmarks show that the nonpreemptive scheduling based on dedicated path can efficiently reduce test application time compared to previous work, and the improved method provides a practical solution to the real-world NoC-based-system testing with both preemptive and nonpreemptive cores. It is also shown that various constraints can be incorporated to deliver a comprehensive test solution

Published in:

IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems  (Volume:25 ,  Issue: 11 )