What is CPU? ,Functions of CPU,Parts of CPU

1. CPU
(CENTRAL PROCESSING UNIT)

2. WHAT IS A CPU?
CPU stands for Central Processing Unit.
It is the important part of any computer system.
It is also called as “brain of the computer”, ”central
processor”, “main processor” or simply “processor”.
The main tasks of a CPU are:
i. Perform all data processing operations.
ii. Store all type of data and results.
iii. Controls and coordinate every part of computer.

3. WHAT IS A CPU?
The CPU contains at least one processor, which is the actual chip inside
the CPU that performs calculations.
Dual-core processor: CPU with two processing cores .
Quad core processor: CPU with four processing cores.
Clock speed: rate at which a processor can complete a processing
cycle. It is typically measured in megahertz or gigahertz.

4. CPU CPU chip

5. FUNCTIONS OF CPU
CPU functions are primarily classified as:
1. FETCH: fetches every instructions from memory.
2. DECODE: convert the instructions into machine readable format.
3. EXECUTE: execute the instructions and perform calculations.
4. STORE: result after execution is stored in memory and given as
output.

6. PARTS OF CPU
ARITHMETIC AND LOGIC UNIT(ALU)
CONTROL UNIT(CU)
MEMORY UNIT
REGISTERS

8. Arithmetic logic unit (ALU)
ALU is divided into 2 units:
• Arithmetic Unit(AU)
• Logic Unit(LU)
Arithmetic unit performs all arithmetic operations like addition,
subtraction, division, multiplication.
Logic unit performs all logic operations like comparing,
selecting, matching, and merging of data.

9. Control unit (cu)
It controls the operations of all parts of the computer.
CU does not carry out any actual data processing operations
and does not store data.
Major functions of CU:
• Controls the transfer of data and instructions.
• Coordinates all units of computer.
• Fetch instructions from memory.
• Communicates with input-output devices.

10. MEMORY UNIT
Memory unit stores data, instructions and intermediate
results.
It is also known as “internal storage”, “primary storage”,
“RAM”, or “main memory”.
It gives data to other parts of computer.

11. REGISTERS
They are temporary storage areas inside CPU.
Also called as processor registers.
Registers may hold instructions, storage addresses, or any
other data.
Instructions may specify registers as part of the instruction.

12. REFERENCE
https://en.wikipedia.org/wiki/Central_processing_unit
https://www.tutorialspoint.com/computer_fundamentals/computer_
cpu.htm
https://turbofuture.com/computers/What-are-the-basic-functions-
of-a-CPU
https://techterms.com/definition/cpu

13. THANKYOU
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