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Elements of Assembly Language Instruction :
Any PIC Instruction consists of:
Code:
Label        Mnemonics        Operands

  1. Label: is textual designation for a line in a program, or section of a program to can jump to the beginning of set of lines of a program.
  2. Mnemonics: is the instruction which already defined by the use of microprocessor. It is the instruction set or the syntax of the used microprocessor.
  3. Operands: are the instruction elements for the instruction is being executed. They are usually registers or variables or constants.
  4. Comment: is a series of words that a programmer writes to make the program more clear and legible. It is placed after an instruction, and must start with a semicolon ";". It is optional.

Code Example :
asm code
start movlw 0x03


Here the start is a label. movlw is a opcode. 0x03 is a operand.



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M. S. Rakha, Ph.D.
Queen's University
Canada


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