How CPU Works

Running head: INFORMATION SYSTEM HARDWARE AND SOFTWARE 1
Information System Hardware
and Software
[Author Name(s), First M. Last, Omit Titles and Degrees]
[Institutional Affiliation(s)]
Author Note
[Include any grant/funding information and a complete correspondence address.]

Running head: INFORMATION SYSTEM HARDWARE AND SOFTWARE 2
HOW CPU WORKS
The Central processing unit (CPU) is the unit which controls how processing of data takes
place. The processing of the data depends on the program instructions. When the user runs a
program by either double clicking on the program icon or via terrain, the following takes place.
First, there is a transfer of the program from hard drive to the RAM. A program is normally a set
of instructions for CPU. Second, the CPU uses its circuit controller named the memory controller
to load the data of the program from the RAM (Calciu, Sen, Balakrishnan, & Aguilera, 2018).
Now that we have the data in the CPU, processing starts to take place. How CPU process the
data depends on the instructions in the program which can be done do arithmetic calculations
done in the arithmetic or logic unit of the CPU. All the instruction execution is controlled by the
CPU’s control unit. The following diagram shows the steps

Running head: INFORMATION SYSTEM HARDWARE AND SOFTWARE 3
The various components and their respective functions are elaborated below
1.1 THE CONTROL UNIT
This part has circuitry that uses electrical wirings to give direction to the computer system to
execute the program instructions already residing in the computer memory. This part is not
actually involved with the real execution but instead just controls how the system will execute by
giving directives to the other CPU and system parts destined to perfume the execution. The
control unit has a direct connection with the memory unit and the ALU units (Chacos, 2018).