Three main features of the concept:

  1. Programs/Instructions and data are stored in the main memory.
  2. Programs/Instructions are fetched and then executed in sequence.
  3. A program/instructions can be replaced by loading another program/instructions into main memory.

Types of architecture:

  1. Von Nuemann
    •  Stores instructions and data in main memory and uses the same data and address bus to fetch each.
    • image040
  2. Harvard
    • Uses separate data stores for instructions and data and uses separate data and address buses to connect the two to the processor.
    • image043
  3. Micro controller (Embedded Computer)
    • A micro controller is a chip that includes the processor, memory and IO. A common example is an MP3 player.

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