BDD-BASED SYNTHESIS OF EXTENDED BURST-MODE CONTROLLERS

We examine the implications of a new hazard-free combinational logic s ynthesis method [1], which generates multiplexor-based networks from b inary decision diagrams (BDD's)-representations of logic functions fac tored recursively with respect to input variables-on extended burst-mo de asynchronous synthesis, First, this method guarantees that there ex ists a hazard-free BDD-based implementation for every legal extended b urst-mode specification. Second, it reduces the constraints on state m inimization and assignment, which reduces the number of additional sta te variables required in many cases. Third, in cases where conditional signals are sampled, it eliminates the need for state variable change s preceding output changes, which reduces overall input-to-output late ncy, Last, we describe a circuit that exemplifies how the BDD variable ordering affects the path delay.