Building a distributed asynchronous control unit through automatic derivation of hierarchically decomposed AFSMs from a CDFG

Although there are several successful asynchronous logic synthesis tools, it is still unwieldy for designers to conceive and describe behaviors for a number of controllers constituting an asynchronous control unit of a target system manually. In this paper, building a distributed asynchronous control unit automatically through automatic derivation of hierarchically decomposed AFSMs from a CDFG is suggested. A resulting control unit consists of small asynchronous controllers and has complete separation of `execution controllers´ and `execution order controllers´. This distributive feature leads to significant improvements in the aspects of area, performance and synthesis time of derived control circuits