Systems architecture

• If performs 


  Fetch decode and execute cycle
• Clock speed 


  Is the rate at which intructions are carried out each second
• ALU


  arithemetic logic unit

  Arithemetic operations such as AND OR and NOT
• What does the CPU do

  Fetches decodes and exucute
• How does the CPU and RAM work together

  CPU fetches the innstructions from RAM

  CPU decodes the instruction and execute it
• Clock speed 


  Measured in hertz the higher the clock the more FDE per second
• Cores 


  Works independently
• Cashe 


  Hold the frequently used instructions

  Located near the CPU
• What is a embedded system

  A system that is built into a larger machine

  These are built for one purpose
• Example for the embedded system

  Washing machine

  Microwave

  Toaster
• Three main parts of the CPU

  Control unit

  Arithmetic logic unit

  Cache
• The control unit 


  Manages the fetching ,decode and execution of program

  Control the flow of data
• Arithmetic logic unit 


  Does the calculations

  Pefotms the logic operation such as AND ,OR and NOT
• Cache 


  Store the frequently uses instruction