Technology mapping for large complex PLDs

Abstract

In this paper we present a new technology mapping algorithm for use with complex PLDs (CPLDs), which consist of a large number of PLA-style logic blocks. Although the traditional synthesis approach for such devices uses two-level minimization, the complexity of recently-produced CPLDs has resulted in a trend toward multi-level synthesis. We describe an approach that allows existing multi-level synthesis techniques to be adapted to produce circuits that are well-suited for implementation in CPLDs. Our algorithm produces circuits that require up to 90% fewer logic blocks than the circuits produced by a recently-published algorithm.