How Data Flows in a Computer
The Central Processing Unit
Know – how data flows around a computer system
Understand – the function of the CPU
Do draw blocks diagrams of how data flows
around a computers system and a block drawing of
Data flows around the computer via the form of electrical
impulses called bits. A computer can only recognise ‘0’ and
‘1’( Binary Code). We will look at this in our next lesson.
All data flows in and out of the Central Processing Unit.
Lets take a closer look
YOU MUST LEARN THIS:
How the CPU works
The Central Processing Unit (CPU) of a
computer is the main processor which
operates the computer - ie it carries out
the instructions of the program being run.
The CPU has three main parts...
•The A.L.U. (Arithmetic and Logic
Unit) which performs all the
•The Control Unit - which controls
the flow of data round the computer by
sending out control signals.
•Memory - which is used to store
Basic Diagram of the CPU
CU- Control Unit
ALU- Arithmetic and
•Draw a diagram and explain how data flows around a
•Draw a diagram of the CPU and explain what each
component is used for
•Find out the correct meanings for RAM and ROM