there are following point which differentiate between microcontroller and microprocessor.
micro controller:
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| block diagram of micro controller |
- its special purpose computer.
- its used only for specific task
- its single integrated chip(IC ) on timer,counter,I/O ports,oscillator,serial communication port all connected.
- fixed amount of RAM,ROM inbuilt chip
- some version of controller connected PROM,EPROM,EEPROM
- few addressing modes in controller
- few instruction for data transfer operation.
- its used in embedded applications i.e coderless phone,washing machine,micro oven
- programming of microcontroller done in assembly language.
- cheaper then processor
- i.e intel8051,intel8052,PIC,zilong(Z80),AT89C51,etc.
microprocessor
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| block diagram of micro processor |
- its general purpose computer.
- its used for multiple and unspecific task.
- in processor no timer,no counter,no oscillator on chip.externally we have to connect this all.
- externally connect RAM & ROM memory.
- more addressing modes.
- more instruction for data transfer operation.
- costly then controller
- require more space for processor based system
