Block Diagram of Computer with its Components & Functions!!

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Block Diagram of Computer
A block diagram of computer displays the internal
structure of the computer, as we as the block
diagram provides the quick overview of internal
working work flow of computer system from
inserting data to retrieving the desired output.
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Block Diagram of Computers Components

• Computer system works with the combination
  of three components like as
• Input Unit
• Central Processing Unit
• ALU Arithmetic Logic Unit
• CU Control Unit
• Memory Unit
• Primary memory
• Secondary memory
• Output Unit

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Input Unit
Input Unit contains the input devices like as
scanner, joystick, keyboard, mouse, etc. These
input devices allow to user for inserting the
instruction or information into the computer
system. Input unit plays the role as a mediator
of communication that gets the data from user to
the computer system for organized manner for
processing.
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Central Processing Unit
CPU (Central Processing Unit) is also called the
Brain or Heart of the computer system. It is
main component of block diagram of computer. CPU
is a hardware electronic device that is capable
to perform various types of operations like as
arithmetic and logical operation. It has ability
to perform all calculations, comparisons or
operations inside of the CPU.
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Arithmetic and Logic Unit
ALU (Arithmetic logic unit) has responsible to
perform all arithmetic and logic operations,
which are data inserted via input devices of
computer, is stored in the main memory storage
unit.
Arithmetical Unit can handle few simple
operations like as addition, subtraction,
division, and   multiplication. Logical Unit is
capable to control the logical operations like as
AND, OR, EQUAL, GREATER THAN, and LESS THAN, and
so on.
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Control Unit
The control unit (CU) deals to perform all
activities and operations of computer inside the
CPU. Control unit has a responsible to control
input/output, memory, and other devices which are
linked to CPU. Control unit obtains the set of
instructions or information, then it helps to
convert the instruction set to control signals,
then these signals are moved to central processor
for later processing.
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Memory Unit
Memory unit also plays the major role in the
computer system because it helps to store data
and instructions before and after processing.
This unit transfers the set of instructions to
another unit of system as per the need.
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Primary Memory
Primary memory is known as Main Memory or
Internal Memory or Primary Storage Device or
Internal Storage Device as well as they play
vital role in computer, because those memories
are capable to access all data directly from CPU
with the help of various buses. These memories
have limited capacity for storage and made by
integrated circuits (IC) or semiconductor
components.
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Secondary Memory
Secondary Memory is also called storage device
and auxiliary memory, external memory.
Secondary storage devices are volatile in nature,
it means that data does not discard while power
turn-off, in which all data store for long time.
Secondary memory has the speed of access of data
is very slow compare to primary memory, and
cheaper as well.
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Output Unit
The output unit of the computer system delivers
the results of computation and displaying the
output outside the world. The output unit
generally works as the opposite process of the
input unit and it convert the binary language
digitalized information to electronic impulses,
which are readable to the output devices. There
are few output devices, which are commonly used
like as monitor, projector, headphone, speaker,
etc.
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