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NOVA: state assignment of finite state machines for optimal two-level logic implementation

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2 Author(s)
Villa, T. ; Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA ; Sangiovanni-Vincentelli, A.

The problem of encoding the states of a synchronous finite state machine (FSM) so that the area of a two-level implementation of the combinational logic is minimized is addressed. As in previous approaches, the problem is reduced to the solution of the combinatorial optimization problems defined by the translation of the cover obtained by a multiple-valued logic minimization or by a symbolic minimization into a compatible Boolean representation. The authors present algorithms for this solution, based on a novel theoretical framework that offers advantages over previous approaches to develop effective heuristics. The algorithms are part of NOVA, a program for optimal encoding of control logic. Final areas averaging 20% less than other state assignment programs and 30% less than the best random solution have been obtained. Literal counts averaging 30% less than the best random solutions have been obtained

Published in:

Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on  (Volume:9 ,  Issue: 9 )

Date of Publication:

Sep 1990

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