This document summarizes the instruction set of the 8051 microcontroller. It discusses the main types of instructions: data transfer instructions like MOV to move data between registers and memory; arithmetic instructions such as ADD, SUB, INC, and DEC; logical instructions including AND, OR, and NOT; and branching/control instructions like CALL, RET, and conditional jumps. Specific examples are provided for each type of instruction to illustrate their usage.

1. NAME:- Chauhan Sachin V.
EN.NO:- 170993109001
TOPIC :- Instruction Set Of 8051 (Microcontroller)
GUIDE:- Mr. Krunal Shah (DEE Ass.professor)

2. CONTENT
• TypesOf Instructions
 Data Transfer Instructions.
 Arithmetic Instructions
 Logical Instructions
 BranchingAnd Machine Control Instruction

3. Data Transfer Instruction
Data transfer instructions are used to transfer the data between
registers, memory, and ports. Thisis akind of data movement
instruction,application of which performs movement of data from
one location to other locations.
Examples:
• MOVdestination, source.
• MOV A, Rn
This Instruction Used To Move Any Data Of Register Bank
To Accumulator.
• MOV A, @Ri
This Instruction Used To Move Data From Any Particular
Register To Accumulator.

4. • MOV A, #Data
This Instruction Used To Move Direct Value To
Accumulator.
• XCH A, Rn
This Instruction Used To Exchange Data Between
Register Bank And Accumulator.

5. Arithmetic Instruction
Arithmetic instructions of8051 Microcontroller performs
arithmetic operations like addition, subtraction,
multiplication, and division.
Advanced features of this set of instruction range to increment,
decrement and adjust decimaloperations.
Examples:
• ADDA, Rn
this instruction used to addition of data between register bank
and accumulator. And result will save on accumulator.
• SUBA,#40H
this instruction used to subtract direct data 40H from
accumulator.And result will save on accumulator.

6. • INC A
this instruction used to increment data of accumulator by 1.
• DEC Rn
this instruction used to decrement data of register bank by
1.
• MUL AB
this instruction used to multiply A and B.
• DIV AB
this instruction used to division of A by B.

7. LOGICAL INSTRUCTION
Theinstruction performs logical operation between the
source byte and destination byte.
Example:
• ANL A,Rn
thisinstructionusedtoapplyingANDgatelogicregisterbank
andaccumulator.Andresultwillsaveinaccumulator.
• ORL A,#51H
thisinstructionusedtoapplyORgatelogictodirectdata51H
andaccumulator.

8. • CLR A
This instruction used to clear accumulator.
 CPL A
this instruction used to make complement of accumulator.
 RL A
this instruction used to rotate accumulator on left side.
 RR A
this instruction used to rotate accumulator on right side.

9.  RRC A
this instruction used to rotate accumulator right side with
carry.
 SWAP A
this instruction used to swap data.
[ D7 D6 D5 D4 D3 D2 D1 D0 ]
[ D3 D2 D1 D0 D7 D6 D5 D4 ]

10. Branching And Machine Control
Instruction
• A CALL ADD
this instruction un-conditionally calls a sub- routine at the
indicated to address at the end of sub- routine the program
will resume operation at the opcode address following the call
instruction.
• RET
when this instruction is educated, it informs the
microcontroller to return back to the program, from where
subroutine was called.
• RET I
this instruction informs the microcontroller that it is
returning from an ISR routine.

11. Conditional Jump