CPU

CPU stands for Central Processing Unit. CPU or simply a processor is the most important part of the computer system.

A Typical CPU Consists Of 2 Parts:

• Control Unit
• Logic Unit
• Control Unit: This part of CPU is used to manage the operation of the CPU. It commands the various computer components to react according to the program’s instruction.
•  Logic Unit: Logic unit is also referred as Arithmetic Logic Unit (ALU). The ALU is a digital electronic circuit placed inside the CPU. 

Register: A register is a very small place which is used to hold data of the processor. A register is used to store information such as instruction, storage address and any kind of data like bit sequence or any characters etc. 

L1 and L2 Cache Memory: Cache Memory is a type of memory which is placed in the processor’s chip or may be placed separately connected by a bus. The use of Cache Memory is to store program instructions which are again and again used by software for an operation. 

Working of CPU

Whenever a data or some instruction or program is requested by the user, the CPU draws it from the RAM (Random Access Memory) and might some other hardware for the purpose.

Now before sending the information back to the RAM, the CPU reads the information associated with the task given to it. After reading the information, the CPU starts its calculation and transporting the data.

Before the data is further executed, it has to travel through the System BUS. A bus in the computer is a communication system that is used to transfer the data among all the components of the computer.

The duty of the CPU is to make sure that the data is processed and is on the system bus. The CPU manages data to make it in a correct order while arranging the data on the system bus. Thus, the action requested by the user is done and the user gets the processed and calculated information. Now when the data is processed, the CPU is required to store it in the system’s memory.