Name
Abstract | ||
|---|---|---|
In this paper we address the problem of verifying the equivalence of two sequential circuits. State-of-the-art sequential optimization techniques such as retiming and sequential redundancy removal can handle designs with up to hundreds or even thousands of flip-flops. However, the BDD-based approaches for verifying sequential equivalence can easily run into memory explosion for such designs. In an attempt to handle larger circuits, we modify test pattern-generation techniques for verification. The suggested approach utilizes the popular efficient backward-justification technique used in most sequential ATPG programs. We present several techniques to enhance the efficiency of this approach by (1) identifying equivalent flip-flop pairs using an induction-based algorithm, and (2) generalizing the idea of exploring the structural similarity between circuits to perform verification in stages. This ATPG-based framework is suitable for verifying circuits either with or without a reset state. In order to extend this approach to verify retimed circuits, we introduce a delay-compensation-based algorithm for preprocessing the circuits. The experimental results of verifying the correctness of circuits after sequential redundancy removal and retiming with up to several hundred flip-flops are presented. |
Year | DOI | Venue |
|---|---|---|
2001 | 10.1145/375977.376022 | ACM Trans. Design Autom. Electr. Syst. |
Keywords | DocType | Volume |
sequential atpg program,bdd-based approach,sequential circuit,suggested approach,sequential redundancy removal,induction-based algorithm,delay-compensation-based algorithm,verifying circuit,additional key words and phrases: equivalence checking,atpg technique,machine equivalence,atpg,state-of-the-art sequential optimization technique,sequential equivalence,equivalence checking,design for testability,sequential circuits,structural similarity,boundary scan | Journal | 6 |
Issue | ISSN | Citations |
2 | 1084-4309 | 13 |
PageRank | References | Authors |
0.85 | 26 | 3 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Shi-Yu Huang | 1 | 766 | 70.53 |
| Kwang-Ting Cheng | 2 | 5755 | 513.90 |
| Kuang-chien Chen | 3 | 347 | 30.84 |