4

ADDRESSING MODES AND DATA MOVE OPERATIONS

CHAPTER OBJECTIVES

In this chapter, the reader is introduced to simpler data-moving instructions of MCS-51 microcontrollers. Different addressing modes offered by MCS-51 are also discussed. After completion of this chapter, the reader should be able to understand:

  • Five types of addressing modes offered by MCS-51.
  • Mnemonics used for data move type instructions.
  • All variations offered by the MOV instructions.
  • Different syntax used in MOV instruction.
  • Limitation of the MOV instruction.
  • Difference between 8085 and MCS-51 data move instructions.

4.1 | Instructions and Instruction Groups of MCS-51

As we have made ourselves familiar with some essential parts of MCS-51 architecture, we may now concentrate ...

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