New Non-Scan DFT Techniques to Achieve 100% Fault Efficiency
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This paper suggests three techniques on non-scan DFT of sequential circuits. The proposed techniques guarantee 100% fault efficiency by using combinational ATPG tool. In all the techniques, an additional circuit called CRIS is proposed to reach unreachable states on the state register of a machine. The second and third techniques use an additional hardware DL to uniquely identify a state appearing in a state register. The design of DL is universal. Test length and hardware overhead outperform the similar approaches.
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- 1.S.T. Chakradhar, A. Balkrishnan, and V.D. Agrawal, “An Exact Algorithm for Selecting Partial Scan Flip Flops,” in Proc. of Design Automation Conference, 1994, pp. 81-86.Google Scholar
- 2.V. Chickermane, E.M. Rudnick, P. Banerjee, and J.H. Patel, “Non-Scan Design-for-Testability Techniques for Sequential Circuits,” in Proc. of Design Automation Conference, 1993, pp. 236-241.Google Scholar
- 3.D.K. Das and B.B. Bhattacharya, “Testable Design of Non-Scan Sequential Circuits Using Extra Logic,” Proc. of Asian Test Symposium, 1995, pp. 176-182.Google Scholar
- 4.S. Devadas and K. Keutzer, “A Unified Approach to the Synthesis of Fully Testable Sequential Machines,” IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, vol. 10, pp. 39-50, 1991.Google Scholar
- 5.H. Fujiwara, Logic Testing and Design for Testability, The MIT Press, 1985.Google Scholar
- 6.S. Ohtake, T. Masuzawa, and H. Fujiwara, “A Non-Scan Approach to DFT for Controllers Achieving 100% Fault Efficiency,” Journal of Electronic Testing: Theory and Applications, pp. 553-566, 2000.Google Scholar
- 7.I. Pomeranz and S.M. Reddy, “Static Test Compaction for Full-Scan Circuits Based on Combinational Test Sets and Non-scan Sequential Test Sequences,” in Proc. of Int'l Conf. on VLSI Design, 2003, pp. 335-340.Google Scholar
- 8.D. Xiang, S. Gu, and H. Fujiwara, “Non-Scan Design for Testability Based on Fault Oriented Conflict Analysis,” Proc. of Asian Test Symposium, 2002, pp. 86-91.Google Scholar
- 9.S. Yang, “Logic Synthesis and Optimization Benchmarks User Guide,” Technical Report 1991-IWLS-UG Saeyang, Microelectronics Center of North Carolina.Google Scholar