Introduction to Microprocessors

A microprocessor executes a collection of machine instructions that tell the processor what to do. 

An intel microprocessor 8085 chip

• A microprocessor is a programmable logic device that can be used to control processes or to turn on/off devices.
• It is a programmable integrated device that has complexity and decision-making capability similar to that of the Central Processing Unit(CPU) of a computer. 

Based on the instructions, a microprocessor does three basic things:

1. Using its Arithmetic Logic Unit(ALU), a microprocessor can perform mathematical operations like: addition, subtraction, multiplication and division. Modern microprocessors contain complete floating point processors that can perform extremely sophisticated operations on large floating point numbers.
2. A microprocessor can move data from 1 memory location to another.
3. A microprocessor can make decisions and jump to a new set of instructions based on those decisions.

REFERENCE BOOK:

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