Computer Organization and Architecture

Computer Organization :-

This refers to operational units and their interconnection includes hardware details such as control signals, interface between computer and peripherals and memory. 

Computer Architecture :- 

This refers to attribute visible to a programmer such as instruction set, number of bits, input-output mechanism and techniques for addressing memory.

Central Processing Unit (CPU) :- 

CPU is the brain of computer which interprets and executes instruction, generally known as microprocessor. CPU chip is rectangular or square in shape has notched corner, made up of flip-flops, logic gates, digital circuits and encoder & decoder. it can fetch, decode and execute and write back to memory. 

CPU takes data from the storage unit, calculates and sent back to the storage unit after processing by ALU (arithmetic and logical unit). 

AU is responsible for Arithmetic operations includes addition, subtraction, multiplication, and division and logic unit performs operations such as AND, OR, NOT, XOR, NOR, NAND etc. 

CU(control unit) handles processor control signals and coordinating among devices by directs input and output flow, fetches code for instructions and direct other units by providing control and timing signals.