S3C84E5/C84E9/P84E9

ADDRESSING MODES

 

 

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)

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Samsung S3C84E5 user manual Addressing Modes, Overview