7
ATtiny15L
1187H–AVR–09/07
The Program and Data
Addressing Modes
The ATtiny15L AVR RISC Microcontroller supports powerful and efficient addressing
modes. This section describes the various addressing modes supported in the
ATtiny15L. In the figures, OP means the operation code part of the instruction word. To
simplify, not all figures show the exact location of the addressing bits.
Register Direct, Single-
register Rd
Figure 4. Direct Single-register Addressing
The operand is contained in register d (Rd).
Register Indirect Figure 5. Indirect Register Addressing
The register accessed is the one pointed to by the Z-register low byte (R30).
Register Direct, Two Registers
Rd and Rr
Figure 6. Direct Register Addressing, Two Registers
0
3
Z-register
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