Control processing unit

Centralised process unit

Central process unified

Central processing unit

Carries out instructions

Is main memory

Is secondary storage

Is an input device

Process data

Execute instructions

Execute data

Operate in Hz

All the programming instructions

Commonly used instructions and data

Instructions that have been processed

Data that hasn’t been used for a long time

Arithmetic Logic Unit

Accumulator

Cache

Control Unit

Memory Address Register

Program Counter

Memory Data Register

Accumulator

To hold the results of a calculation

To hold the accumulation of instructions that are about to happen

To hold the accumulation of instructions that have happened

To perform arithmetic operations

Memory Address Register

Program Counter

Memory Data Register

Accumulator

Memory Data Register

Accumulator

Memory Address Register

Program Counter

To carry out arithmetic operations

To carry out logical operations

To carry out addition operations

To move data between the CPU and accumulator

Controls the flow of data around the CPU and to and from other components

Controls the actions carries our by the CPU and other components

Controls the input and output devices that are attached to the computer

Controls the timings of the CPU and limits and increases it's frequencies when needed