Logical Group in 8051
The Logical Group in the 8051 microcontrollers has been divided into 25 different instructions. There is a Carry Flag (CY) which directly affects the instructions of the RRC and RLC in this particular microcontroller. Here are the all instruction groups of the 8051 microprocessor as mentioned below.
| Instruction | Operation | Description | Example |
|---|---|---|---|
| ANL | AND | Logical AND between operands. | ANL A, #0x0F |
| ANL | AND | Logical AND between accumulator and direct address. | ANL 20H, A |
| ANL | AND | Logical AND between direct address and source operand. | ANL 20H, #0x0F |
| ORL | OR | Logical OR between operands. | ORL A, #0xF0 |
| ORL | OR | Logical OR between accumulator and direct address. | ORL 20H, A |
| ORL | OR | Logical OR between direct address and source operand. | ORL 20H, #0xF0 |
| XRL | XOR | Logical XOR between operands. | XRL A, #0xFF |
| XRL | XOR | Logical XOR between accumulator and direct address. | XRL 20H, A |
| XRL | XOR | Logical XOR between direct address and source operand. | XRL 20H, #0xFF |
| CPL | Complement | Complements all bits in the accumulator. | CPL A |
| CPL | Complement | Complements the specified bit. | CPL P1.0 |
| CLR | Clear | Clears all bits in the accumulator. | CLR A |
| CLR | Clear | Clears the specified bit. | CLR P1.0 |
| SETB | Set Bit | Sets the specified bit. | SETB P1.0 |
| MOV | Move | Moves the carry flag to the specified bit. | MOV P1.0, C |
| MOV | Move | Moves the specified bit to the carry flag. | MOV C, P1.0 |
Given below is the block diagram of 8051 microcontroller :
Block Diagram of 8051 Microcontroller
Logical Group in 8051
The 8051 microcontroller always operates on a single bit in a particular memory or register. The location of the bits is specific and it is specified as an offset value in the operand’s low-order end. In this article, we will discuss the logical groups or the logical instructions of the 8051 microcontroller in detail.
Table of Content
- Logical Group in 8051
- Advantages
- Disadvantages
- Applications