Texas Instruments TMS320C3x - Manual (Page 155)

Addressing Types
6-2
6.1 Addressing Types
You can access data from memory, registers, and the instruction word by using
five types of addressing:
- Register addressing . A CPU register contains the operand.
- Direct addressing . The data address is formed by concatenating the
eight least significant bits (LSBs) of the data-page (DP) register and the
16 LSBs of the instruction.
- Indirect addressing . An auxiliary register contains the address of the
operand.
- Immediate addressing. The operand is a 16-bit or 24-bit immediate value.
- PC-relative addressing. A 16-bit or 24-bit displacement to the program
counter (PC).
Two specialized modes are available for use in filters, FFTs, and DSP algorithms:
- Circular addressing . An auxiliary register is incremented/decremented
with regards to a circular buffer boundary.
- Bit-reverse address ing. An auxiliary register is transferred to its bit-
reversed representation that contains the address of the operand.