Addressing mode is the way of addressing a memory location in instruction. Microcontroller needs data or operands on which the operation is to be performed. The method of specifying source of operand and output of result in an instruction is known as addressing mode. There are various methods of giving source and destination address in instruction, thus there are various types of Addressing Modes. Here you will find the different types of Addressing Modes that are supported in Micro Controller 8051. Types of Addressing Modes are explained below: Also Read: Types Of Addressing Modes. • Register Addressing Mode: In this addressing mode, the source of data or destination of result is Register.

In this type of addressing mode the name of the register is given in the instruction where the data to be read or result is to be stored. Example: ADD A, R5 ( The instruction will do the addition of data in Accumulator with data in register R5) • Direct Addressing Mode: In this type of Addressing Mode, the address of data to be read is directly given in the instruction. Cours Microsoft Office Access 2007 Pdf. In case, for storing result the address given in instruction is used to store the result. Example: MOV A, 46H ( This instruction will move the contents of memory location 46H to Accumulator) • Register Indirect Addressing Mode: In Register Indirect Addressing Mode, as its name suggests the data is read or stored in register indirectly.