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S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X ADDRESSING MODES
3-1
3 ADDRESSING MODES
OVERVIEW
Instructions that are stored in program memory are fetched for execution using the program counter. Instructions
indicate the operation to be performed and the data to be operated on. Addressing mode is the method used to
determine the location of the data operand. The operands specified in SAM88RC instructions may be condition
codes, immediate data, or a location in the register file, program memory, or data memory.
The S3C8-series instruction set supports seven explicit addressing modes. Not all of these addressing modes are
available 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)