Von Neumann Model

 

Von-Neumann proposed his computer architecture design in 1945.  He wanted a model in wich the instruction data and progam data were stored in the same memory. 

COMPONENTS OF THE VON-NEUMANN MODEL: 

  • CPU: Electric circuit responsible for executing the instructions of a computer program.
Inside the CPU, we can find: 
The ALU( Arithmetic and Logic Unit) performs micro-operation for executing the instruction
The registers are high-speed storage areas in the CPU. The data processed by the CPU are ran from the registers.
The Control Unit controls the operations of the ALU, the memory and the I/O devices. 
  • BUSES: Means that conect the CPU, the memory and the peripherals. 

Address Bus

Carries the address of data (but not the data) between the processor and the memory.

Data Bus

Carries data between the processor (CPU), the memory unit and the input/output devices.

Control Bus

Carries signals/commands from the CPU.

  • MEMORY UNIT: Stores binary information in groups of bits called words. Everything passes through the RAM.
RAM: short-term memory, where the data that the processor is currently using is stored. 

  • PERIPHERALS AND HARDRIVE(INPUT-OUTPUT): Transfers information in and out of the storage. For example, it carries information out of the keybord. 


The figure defines one of the various possible methods of interconnecting these components.






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