To study microprocessor, first we should have clear knowledge on what is a microprocessor? The name comes from the combination of two word micro and processor.
Introduction
Now as we know, that processor means a device that processes something. But in reference to microprocessor study, processor means a device that processes numbers, specifically binary numbers, 0’s and 1’s. And we know micro means very small in size. Therefore microprocessor as a whole a device which is small in size and process binary numbers.
So in definition we can say the it is a programmable device. Firstly, it takes input as numbers. Secondly, it performs on them arithmetic or logical operations according to the program stored in memory. Thirdly, then after processing appropriate task written in program it generate the result. Finally, send the result to output device or memory location.
What is programming?
So to work with a microprocessor we have to give proper instruction to it to work particular task. And those sets of sequential instruction as whole called program. The microprocessor can perform different sets of operations on the data it receives depending on the sequence of instructions supplied in the given program. By changing the program, it can manipulates the data in different ways.
What is instructions?
Now question is what is instructions? Each microprocessor is designed to execute a specific group of operations. This group of operations is called an instruction set. This instruction set defines what it has to do and cannot do. Like suppose we want to store data 02 in resistor B then the instruction will be in assembly language for 8085 microprocessor is MVI B, 02H. Here MVI means move immediate the data 02h to resistor B. Here 02h, H used for hexadecimal number.
Now some important terms we should know that the data that the microprocessor manipulates must come from somewhere. It comes from what is called “input devices”. These are devices that bring data into the system from the outside world. These represent devices such as a keyboard, a mouse, switches, and the like.
Let’s check how you learn “What is a Microprocessor?” with a simple quiz.
Architecture of 8085 microprocessor8085 Architecture
