Addressing Modes of 8085 Microprocessor

Addressing Modes of 8085 Microprocessor:

Part of the programming flexibility for each microprocessor is the number and different kind of ways the programmer can refer to data stored in the memory. The different ways that a microprocessor can access data are referred to as addressing modes. Addressing Modes of 8085 Microprocessor are :

  1. Immediate Addressing Mode in 8085
  2. Register Addressing Mode in 8085
  3. Direct Addressing Mode in 8085
  4. Indirect Addressing Mode in 8085
  5. Implied Addressing Mode in 8085

1. Immediate Addressing Mode in 8085:

In an Immediate Addressing Modes of 8085 Microprocessor, 8 or 16 bit data can be specified as a part of instruction. In 8085, the instructions having ‘I’ letter fall under this category. ‘I’ indicates immediate addressing mode.

Addressing Modes of 8085

2. Register Addressing Mode in 8085:

Another Types of Addressing Modes in 8085 is Register Addressing Mode in 8085 which specifies the source operand, destination operand, or both to be contained in an 8085 registers. This results in faster execution, since it is not necessary to access memory locations for operands.

Addressing Modes of 8085

3. Direct Addressing Mode in 8085:

The Direct Addressing Mode in 8085 specifies the 16 bit address of the operand within the instruction itself. The second and third bytes of instruction contain this 16 bit address.

Addressing Modes of 8085

4. Indirect Addressing Mode in 8085:

In Indirect Addressing Mode in 8085, the memory address where the operand located is specified by the contents of a register pair.

5. Implied Addressing Mode in 8085:

In Implied Addressing Mode in 8085, opcode specifies the address of the operands.

Updated: May 10, 2020 — 8:44 pm