2. Agenda
• Types of Instructions
• Data transfer instructions.
• Arithmetic instructions
• Logical Instructions
• Program Control Instructions
• Bit manipulation instructions
3. Types of Instructions in 8051 MC
• Data transfer instructions.
• Arithmetic instructions
• Logical Instructions
• Program Control Instructions
• Bit manipulation instructions
4. Data transfer instructions
Data transfer instructions are used to transfer the data between registers,
memory, and ports. This is a kind of data movement instruction, application
of which performs movement of data from one location to other locations.
Examples:
• MOV destination, source.
• XCH
• XCHD
• PUSH and POP
5. Arithmetic instructions
Arithmetic instructions of 8051 Microcontroller performs arithmetic
operations like addition, subtraction, multiplication, and division.
Advanced features of this set of instruction range to increment, decrement
and adjust decimal operations.
Examples:
• ADD A, byte
• SUBB A, byte
• MUL AB
• DIV AB
• INC byte
• DEC byte
• DAA
6. Logical Instructions
The instruction performs logical operation between the source byte and
destination byte.
Example:
• ANL destination, origin
• ORL destination, origin
• XRL destination, origin
In case of Accumulator
• CLR A
• CPL A
• SWAP A
• RL A.
• RLC A
• A. RR.
• A. RRC.
7. Bit manipulation instructions
Bit manipulation instructions are used to manipulate the value of specified
bit. It either sets, resets or complement the value of the destination bit.
For example:
• CLR bit
• SETB bit
• CPL bit
