Purpose of the CPU

What is the purpose of the Central Processing Unit ( CPU )?

Fetch, decode and execute instructions

What is the CPU’s job?

1. take input

2. process data

3. produce an output

What’s the CPU made up off?

components & registers

During the fetch stage of the cycle, the next instruction or data must be fetched from where?

computers memory ( RAM )

After the fetch stage where is the data brought back to?

CPU

During the decode stage of the cycle, what does the CPU need to do?

work out what is required from the instruction

During the execute stage of the cycle, what will the CPU do with the instruction that was fetched?

carry out the instruction

1. an instruction or data is fetched from memory

2. the instruction is decoded

3. the instruction is executed

4. the cycle repeats billions of times per second

5. answer = free

free