What are the components of the controller?

2023-04-19

The controller consists of program counter, instruction register, instruction decoder, timing generator and operation controller.
The controller is divided into a combination logic controller and a microprogram controller, each with its strengths and weaknesses. The design of a combined logic controller is cumbersome and has a complex structure. Once the design is completed, it cannot be modified or expanded, but its speed is fast. The design of a microprogram controller is convenient, with a simple structure and easy modification or expansion. To modify the function of a machine instruction, only the corresponding microprogram needs to be reprogrammed;
To add a machine instruction, simply add a microprogram to the control memory, but it is done by executing a microprogram. The specific comparison is as follows: a combination logic controller, also known as a hardwired controller, is composed of logical circuits and relies entirely on hardware to achieve the function of instructions.
There are many classifications of controllers, such as LED controllers, microprogramming controllers, access control controllers, electric vehicle controllers, bus tie controllers, automatic transfer switch controllers, single chip microcontrollers, etc.
1. LED controller: A switch that controls various positions in the LED light circuit through chip processing. The controller controls the driver circuit according to a predetermined program to make the LED array emit light regularly, thereby displaying text or graphics.
2. Micro program controller: Compared with combination logic controllers, micro program controllers have a series of advantages such as regularity, flexibility, and maintainability, gradually replacing the early combination logic controllers in computer design and have been widely used. In computer systems, microprogramming technology is a technique that utilizes software methods to design hardware.
3. Access Control System: also known as Access Control System, it is developed on the basis of traditional door locks. The access control controller is the core of the system, utilizing a combination of modern computer technology and various recognition technologies to embody an intelligent management method.
4. Electric vehicle controller: The electric vehicle controller is the core control device used to control the start, operation, forward/backward, speed, stop, and other electronic components of the electric vehicle motor. It is like the brain of the electric vehicle and an important component on the electric vehicle.