Comparison between Von Neumann and Harvard
Architecture
The following table highlights the major differences between Von Neumann and
Harvard Architecture −
Basis of Von Neumann Harvard Architecture
Comparison
The Von Neumann architecture The Harvard Architecture is the
is a style of computer current design standard, and it
Definition architecture that is features RAM and ROM that are
straightforward and makes use kept completely independent.
of a single memory connection.
The layout is straightforward When compared to the Von
and makes use of the same Neumann architecture, this design
Design path to both store data and is more complicated because it
take instructions. utilises separate connections for
RAM and ROM.
When compared to Harvard When compared to the Von
Architecture, the hardware Neumann Architecture, the
Hardware requirements are significantly Harvard Architecture places a
lower. greater emphasis on the use of
hardware.
In comparison to the Harvard Harvard Architecture is faster
Architecture, the speeds of the than the others. A computer
processors are significantly modelled are significantly lower.
Speed
lower. after the Harvard Architecture
calls for an increase in the
available space.
When compared to the Harvard In Harvard Architecture, the
Architecture computers, the requirement for the actual space
Physical Von Neumann computers have is increased.
space a smaller footprint in terms of
the required amount of physical
space.
Because the memory and the Because the instruction memory
Internal
programmes share the same and the data memory cannot
memory
share the same space, some of
Basis of Von Neumann Harvard Architecture
Comparison
space, there is no unused space Harvard's internal memory is
in the internal memory. going to waste somewhere.
The instructions for running can Due to the fact that the input and
either be taken from the the programme instructions that
Running programme that has been are stored in the programme are
Instructions stored or they can be given taken simultaneously, the running
explicitly. As a result, the two instructions are somewhat
cannot be considered together. complicated and somewhat slow.
Conclusion
Von Neumann and Harvard are both known for their contributions to the field of
computer architecture. They are the antithesis of one another in every way. When
compared to the Von Neumann, the Harvard computers necessitated more storage
space but were significantly faster.
The Von Neumann algorithm is straightforward and makes use of the same
processing unit for both the instructions and the programs, whereas the Harvard
algorithm is more complicated and uses separate processing units for each type of
data. Every element of the Von Neumann Architecture is a direct contrast to the style
of Harvard Architecture.
: Washing Machine
A washing machine from an embedded systems point of view has:
a. Hardware: Buttons, Display& buzzer, electronic circuitry.
b. Software: It has a chip on the circuit that holds the software which drives
controls & monitors the various operations possible.
c. Mechanical Components: the internals of a washing machine which actually
wash the clothes control the input and output of water, the chassis itself.