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 in- novative CMOS direct-mappedasynchronous circuit de- sign approach, which, by defining a one-to-one mapping between state diagram and CMOS circuit implementa- tion, removes the need for race and hazard circuit analy- sis. It allows for regular, fast, multiple-input-change, n on- fundamental mode asynchronous control circuits to be re- alised in CMOS technology.