3.2 Central Processing Unit

The CPU is a set of electrical circuits responsible for controlling and processing data within the computer. It is the 'brain' of the computer. The CPU, in a personal computer is located on a silicon chip(IC) on a motherboard or mainboard.

The CPU is made up of three parts

1.                  Control Unit which co-ordinates the operations of the input, processing, output and storage. It directs the flow of data.

2.                  Arithmetic logic Unit carries out all the mathematical (+,-,*,/), comparison(eg <,>,=) and logical (AND,NOT,OR)

3.                  Registers are temporary storage areas. for small amounts of data during processing. They are accessed faster than primary storage.

Write out the sentence and fill in the missing word

 

The CPU stands for the Central ????? Unit.

The ????? is the ‘brain’ of the computer.

The CPU accepts data from an ????? device.

The CPU sends the results to an ????? device.

The CPU is made up of millions of electrical components located on a thin silicon wafer called an ????? circuit.

In a ????? the CPU is contained on one integrated circuit and is called a microprocessor.

A flat printed circuit board inside the computer is called the ?????

The ????? is the organiser that directs the flow of data in the computer.

Part of the CPU that carries out all mathematical and logical calculations is called the ?????.

A ????? is a temporary storage area for small amounts of data and instructions needed for processing.