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Switching activity generation with automated BIST synthesis for performance testing of interconnects

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3 Author(s)
Pendurkar, R. ; Sun Microsyst. Inc., Sunnyvale, CA, USA ; Chatterjee, A. ; Zorian, Y.

A novel scheme of synthesizing nonlinear feedback shift register structures that can be superimposed on the boundary of the component of a system under test to generate interconnect switching activities that resemble real life interconnect switching profiles is proposed. The goal is to perform at-speed interconnect test while simultaneously capturing the dynamic switching effects such as crosstalk and ground bounce, as accurately as possible during interconnect built-in self-test. A library of nonlinear feedback shift register structures called precharacterized test pattern generators (P-TPGs) is constructed. Components of P-TPGs can be modeled using Markov chain and can be interconnected together in specific ways to recreate the switching activity profile of the interconnections being tested. The unique advantage of this scheme is that there is no simulation overhead since P-TPG components are precharacterized by solving Markov equations analytically. An integrated genetic algorithm-based search and optimization technique for finding the best P-TPG component among various possible implementations and matching its activity profiles with those of the interconnections under test has been designed and implemented synthesis for testability allows generation of the worst case interconnect switching activities. Experimental results confirm the validity of our approach

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Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on  (Volume:20 ,  Issue: 9 )