1.1 System Architecture

1.1 System Architecture

1. Processor

   • Processes information

2. MHz

3. GHz

   • 1GHZ Executes 1billion instructions per second
   • 2GHZ executes 2 billion instructions per second

4. Hertz HZ

   • Measurement of electricity

5. Excute

   • Complete an instruction

6. Instruction

   • Telling something to do something

7. Embedded System

   • Computer system that is made up of software and hardware
     • e.g Dishwasher

8. Clock Speed

9. Cache

   • Cache Acts as an intermediary between the processor and Main memory
     • Intermediary - Acts as a link
   • Having bigger cache will reduce the number of memory disk transfers

10. Core

11. RAM (Random Access Memory)

    • Holds data and instructions that are currently in use by the processor
    • Volatile
      • Gets emptied when power is turned off

12. ROM - Read Only Memory

    • Instructions are pernamentaly etched on a ROM chip
      • E.G Gives the Instructions to start up the operating system
    • Non-volatile

13. EEPROM - Electronically Erasable Programmable Read Only Memory

    • E.G Sim Cards / Flash memory
      • Data / Instructions can be electronically erased and replaced

14. Fetch - Decode - Execute cycle

    • Instruction that has been addressed is transferred back to the processor along the data bus.
      • This is held in the Memory Data Register.
        • The instruction would then be transferred to the Current Instruction Register.
    • The instruction is decoded to help the current instruction register
      • The instruction is split into an Op-code and an operand
        • The instruction is carried out by the Arithmetic Logic Unit

15. Sean Bentley