Components of a microprocessor-based system

Various components of a microprocessor-based system are:-

1. The Microprocessor
2. The Memory
3. The Input Device
4. The Output Device
5. The Bus

Functions of various components of a microprocessor-based system

The functions of various components of a microprocessor-based system can be summarized as follows:

1. The Microprocessor

• Reads instructions from memory.
• Communicates with all peripherals (memory and I/O) using the system bus.
• Controls the timing of information flow.
• Performs the computing tasks specified in a program.

     2. The Memory

• Stores binary information called instructions and data.
• Provides instructions and data to the microprocessor on request
• Stores results and data for the microprocessor.

     3. The Input Device

• Enters data and instructions under the control of a program such as a monitor program.

     4. The Output Device

• Accepts data from the microprocessor as specified in a program.

     5. The Bus

• carries bits between the microprocessor and memory and I/O.

Now what is a Micro controller and a Microcomputer?

Micro controller: 

A device that includes microprocessor, memory and input/output signal lines on a single chip, fabricated using VLSI technology.

Microcomputer:

A computer that is designed using a microprocessor as its CPU. It includes microprocessor, memory and input/output.

REFERENCE BOOK:

- Ramesh S. Goankar, “Microprocessor Architecture,. Programming and Applications with 8085”, 5th Edition.