Lavrik A. Control unit with several code sources synthesis methods

The subject of research: synthesis of compositional microprogram control units with common memory and code sharing. The aim - development of structures and methods of synthesis of ompositional microprogram control units, oriented on diminishing of logic circuit's hardware expenses under its realization on CPLD.The analysis of features of CPLD and existent structures and methods of compositional microprogram control unit is proposed, oriented on realization of control unit logical circuit on CPLD. Structures are developed and methods of hardware expenses diminishing in control unit logical circuit are modified, based on application of a few sources of codes of the pseudoequivalent states and oriented to the effective use of features of the CPLD. Application of the developed structures provides diminishing hardware expenses in the circuit of control unit up to 30%. Algorithm of compositional microprogram control unit with lowest hardware amount on chosen GSA developed, based on GSA characteristics and logical circuit realisation basis analysis. Sphere of application: enterprises of microelectronics and radioelectronic industry, which are designing circuit of control unit of FPGA.