Multiple choice

Architecture of microprocessor differs from microcontroller since

  1. 8255 is not used by microcontroller, but microprocessor uses it

  2. extended RAM & ROM memory are not used in microcontroller but used in microprocessor

  3. RISC can be implemented in microprocessor, but not in microcontroller

  4. microprocessor has internal flash memory, but microcontroller does not

  5. none of the above
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A Correct answer
Explanation

For parallel I/O operation, microprocessor uses a programmable peripheral interface (PPI) IC as controller/interface device for parallel I/O while this is internally implemented in microcontroller. So, microcontroller does not require 8255. 

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