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1. What is the full form of 'MPU' & 'MCU'?
Ans: MPU: Microprocessor Unit; MCU: Micro-controller Unit.
2. What is the difference between MPU & MCU?
Ans:
Microprocessor
|
Micro
Controller
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Microprocessor is heart of Compute
system.
|
Micro Controller is a heart of
embedded system.
|
It is just a processor. Memory and I/O
components have to be connected externally
|
Micro controller has external
processor along with internal memory and i/O components
|
Since memory and I/O has to be
connected externally, the circuit becomes large.
|
Since memory and I/O are present
internally, the circuit is small.
|
Cost of the entire system increases
|
Cost of the entire system is low
|
Due to external components, the entire
power consumption is high. Hence it is not suitable to used with devices
running on stored power like batteries.
|
Since external components are low,
total power consumption is less and can be used with devices running on
stored power like batteries.
|
Most of the microprocessors do not
have power saving features
|
Most of the micro controllers have
power saving modes like idle mode and power saving mode. This helps to reduce
power consumption even further.
|
Since memory and I/O components are
all external, each instruction will need external operation, hence it is
relatively slower.
|
Since components are internal, most of
the operations are internal instruction, hence speed is fast.
|
Microprocessor have less number of
registers, hence more operations are memory based
|
Micro controller have more number of
registers, hence the programs are easier to write.
|
Microprocessors are based on von
Neumann model/architecture where program and data are stored in same memory
module
|
Micro controllers are based on Harvard
architecture where program memory and Data memory are separate
|
Mainly used in personal computers
|
Used mainly in washing machine, MP3
players
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