Miroshkin A. Synthesis methods of compositional microprogram control units with modification of microinstruction addressing system

The subject of research: synthesis of compositional microprogram control units. The aim - solution of important scientific task of new compositional microprogram control unit (CMCU) structures and synthesis methods development. Structures are oriented on hardware reduction in logic circuits of CMCU when implementation in FPGA basis. Some of modern FPGA chips features can be efficiently used when implementing CMCU in this basis. Embedded memory blocks (EMB) can be customized in one of acceptable organization. Free EMB recourses in the form of free outputs or unused memory words can be there in a chip. The free recourses can be used for hardware reduction in a combinational part of CMCU logical circuit. Codes of pseudoequivalent operational linear chains classes are used for microinstruction address formation and free EMB recourses are used for storing of these codes. Dissertation work shows, that average economy of hardware amount is 26 % when using proposed modifications of microinstruction addressing system. New methodic and corresponding algorithm are proposed to select CMCU structures, circuits of which are characterized by minimum hardware amount and suitable operational time, when implementing in FPGA basis. Sphere of application: enterprises of microelectronics and radioelectronic industry, which are designing circuit of control unit of FPGA.