Hardware reduction in FPGA-based compositional microprogram control units

Abstract

The new design method for compositional microprogram control units with code sharing is proposed. The method targets on reduction in the number of look-up table elements in the combinational part of control unit. Some additional control microinstructions containing codes of the classes of pseudoequivalent chains are used for operational linear chains modification. The proposed method is illustrated by an example. The research results for various graph-scheme of algorithms (GSA) are illustrated with the diagrams. Most desirable GSA characteristics for using proposed method were obtained.