Direct-mapped Asynchronous Finite-state Machines in Cmos Technology

Conventional asynchronous control circuit design is complex because potential designs must be analysed for the existence of hazards and state variable races, as these may cause incorrect circuit operation. We present the innovative CMOS direct-mapped asynchronous circuit design approach, which, by defining a one-to-one mapping between state diagram and CMOS circuit implementation, removes the need for race and hazard circuit analysis. It allows for regular, fast, multiple-input-change, nonfundamental mode asynchronous control circuits to be realised in CMOS technology.