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Microcontrollers

A microcontroller is a compact integrated circuit constructed to complete a specific action in an embedded system. Typically, a microcontroller will include a processor, memory, and (I/O) peripherals on a single chip. Microcontrollers are also sometimes known as embedded controllers or microcontroller units. They are commonly found in vehicles, office machines, robots, mobile radios, medical devices, vending machines, transceivers, home appliances, etc. They are crucially miniature personal computers constructed to control small features of a more significant component without having a complex front-end operating system. Nowadays, you will find various microcontrollers with varying word lengths, such as 4 bit, 8bit, 64 bit, and 128bit microcontrollers.

How Do Microcontrollers Work?

A microcontroller is usually embedded in a system to control one specific operation in a device. It accomplishes this by interpreting the data from the input/output peripherals using its central processor. The temporary information received by the microcontroller will be stored in its data memory. The processor can access it and utilize the instructions stored in its program memory to decipher and apply the incoming data. It then uses its input and output peripherals to communicate and enact suitable action.

Microcontrollers have been widely used in many devices and systems. Devices often use many microcontrollers that work together in a device to handle their specific tasks.

For example, a car might consist of many microcontrollers that help control various systems, like traction control, anti-lock braking system, fuel injection, etc. All of the microcontrollers will communicate with each other and perform suitable operations. Some of them will communicate with the more complicated central computer inside the car, while others might only communicate with the rest of the microcontrollers. They can send and receive data by using their input and output peripherals and then processing that data to perform the required tasks.

Basics of Microcontrollers

Usually, electric appliances that measure, store, display information, or calculate consist of a microcontroller. The basic structure of a microcontroller consists of:

  • CPU: CPU is known as the brain of microcontrollers. CPU is the kind of device used to gather data, decode it and then complete the required task at the end. With the help of the CPU, the microcontroller components can be connected to a system.
  • Memory: In a microcontroller, the memory chip works the same way as a microprocessor. All programs and data are stored in a memory chip. Microcontrollers are known to be built-in with specific RAM or ROM or flash memory to store program source codes.
  • Input/Output Ports: These ports operate different appliances like LCD LEDs, printers, etc.
  • Serial Ports: Serial ports interfere between microcontrollers and other peripherals, such as a parallel port.
  • Timers: You will find a built-in microcontroller counter or a timer as well. The timers and controllers are then responsible for controlling all the timing functions within the microcontroller.
  • ADC: The analog-digital converter is used to convert analog signals to digital. The digital signal that is produced can be used for different applications.
  • DAC: DAC is opposite in function to an ADC. This device is used to guide analog devices like DC motors. 
  • Interpret Control: This Gives delayed control for a working program. The interpret control can be both internal and external.
  • Special Functioning Block: Some unique microcontrollers are made for special appliances like robots, consisting of this particular functioning block.

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