S3F84B8_UM_REV 1.00 3 ADDRESSING MODES3-13 ADDRESSING MODES3.1 OVERVIEW OF ADDRESSING MODESThe program counter fetches the instructions stored in the program memory for execution. These instructionsindicate the operation to be performed and the data to be operated on. Addressing mode is the method used todetermine the location of the data operand. The operands specified in SAM8RC instructions can include: conditioncodes, immediate data, or a location in the register file, program memory, or data memory.The S3C-series instruction set supports seven explicit addressing modes. Not all of these addressing modes areavailable for each instruction. The seven addressing modes and their symbols are: Register (R) Indirect Register (IR) Indexed (X) Direct Address (DA) Indirect Address (IA) Relative Address (RA) Immediate (IM)
