Theory and Design Switching Circ
Theory and Design Switching Circ
Design of Asynchronous Sequential Networks Using Read-Only Memories
IEEE Transactions on Computers
Self-Synchronizing Circuits and Nonfundamental Mode Operation
IEEE Transactions on Computers
Theoretical and Experimental Behavior of Synchronizers Operating in the Metastable Region
IEEE Transactions on Computers
Direct Transition Memory and its Application in Computer Design
IEEE Transactions on Computers
Self-Synchronized Asynchronous Sequential Machines
IEEE Transactions on Computers
Synthesis of Multiple-Input Change Asynchronous Machines Using Controlled Excitation and Flip-Flops
IEEE Transactions on Computers
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A mixed mode sequential machine (MSM) is defined as a representation in which both synchronous (clocked) and asynchronous (unclocked) state transitions are allowed. The intent of the representation is to allow designers to consider both types of transitions in a single structure, thereby promoting the use of LSI devices such as ROM's or PLA's to resolve the realization question. The approach is thus different from conventional design methods, in which asynchronous problems are treated separately with separate devices. The problems of state reduction, state assignment, and realization are covered. Of particular note is the development of a ROM implementation, which allows both clocked and unclocked transitions to occur.