Addressing Modes of 8051
ADDRESSING MODES OF 8051 Ans: Various methods of accessing the data are called addressing modes. 8051 addressing modes are classified as follows. i. Immediate addressing. - In this addressing mode the data is provided as a part of instruction itself. - In other words data immediately follows the instruction. Eg. MOV A,#30H ADD A, #83 ii. Register addressing. - In this addressing mode the register will hold the data. - One of the eight general registers (R0 to R7) can be used and specified as the operand. Eg. MOV A, R0 ADD A, R6 - R0 – R7 will be selected from the current selection of register bank. - The default register bank will be bank 0. iii. Direct addressing - In direct addressing, an 8 bit internal data memory address is specified as part of the instruction and hence