中文版
Description
The UNS2882A-3BHE003855R0001 controller consists of a program counter, an instruction register, an instruction decoder, a timing generator and an operation controller.
The controller is divided into combinatorial logic controller and microprogram controller. The two controllers have their own advantages and disadvantages. Combinatorial logic controller design is troublesome, complex structure, once the design is completed, it can not be modified or expanded, but its speed is fast. Microprogram controller is convenient in design, simple in structure, easy to modify or expand, modify the function of a machine instruction, only need to reprogram the corresponding microprogram;
UNS2882A-3BHE003855R0001 To add a machine instruction, only a microprogram is added to the control memory, but it is done by executing a microprogram. The specific comparison is as follows: The combined logic controller, also known as the hard-wired controller, is composed of logic circuits and completely relies on hardware to achieve the function of instructions.
UNS2882A-3BHE003855R0001 controller (controller) refers to the main command device that changes the wiring of the main circuit or control circuit and changes the resistance value in the circuit to control the start, speed regulation, braking and reverse of the motor in accordance with the predetermined sequence. Composed of program counter, instruction register, instruction decoder, timing generator and operation controller, it is a “decision mechanism” that issues commands, that is, to complete the coordination and command of the operation of the entire computer system
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