Control signal sharing of asynchronous circuits using datapath delay information

Due to state explosion problem in synthesis, most of asynchronous CAD tools based on graph models cannot handle large specifications. To overcome this problem, in this paper, we propose two control signal sharing methods by using the delay information of datapath circuits. The reductions of signals by sharing reduce the number of states significantly and result in area optimal circuits. They are carried out at control flow graph (CFG) descriptions in terms of node sharing. Experimental results are encouraging in that a number of control signals are shared.