1.1 System Architecture

Question 1

Describe the process of the FDE cycle?

Answer 1

CPU fetches instructions from the Ram to the CPU. This is then decoded and executed e.g carrying out a calculation

Question 2

What does a clock speed of 3GHZ mean?

Answer 2

3 billion FDE cycles per second

Question 3

What is carried out by the ALU?

Answer 3

Carries out mathematical equations

Question 4

What is the control unit?

Answer 4

Send signals on how to control data

Question 5

What is Cache?

Answer 5

Small amount of fast access memory for frequently used data

Question 6

What are four registers?

Answer 6

Accumalator,MAR,MDR and PC

Question 7

What is the function of the accumalator?

Answer 7

Holds results of calculations

Question 8

What is the function of the MAR?

Answer 8

Memory address registers holds the address of where data is to be fetched

Question 9

What is the function of the MDR?

Answer 9

Holds the data

Question 10

What is the function of the Program Counter?

Answer 10

Holds the address of the next instruction

Question 11

What are the four factors affecting CPU speed and how?

Answer 11

Clock speed-Number of FDE cycles per second
Cache Size-Fast access memory so the more cache the faster
Number of Cores-Cores are a complete copy of a CPU

Question 12

What are embedded systems?

Answer 12

CPUs to carry out a specific function

Question 13

What are the advantages and disadvantages of embedded systems?

Answer 13

They are cheap,small and have low power consumptio however only carry out one function.