Program And Data Addressing Modes - Atmel AVR AT90S2313 Manual

8-bit avr microcontroller with 2k bytes of in-system programmable flash

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Program and Data

Addressing Modes

Registers Rd and Rr

I/O Direct

0839G–08/01

The AT90S2313 AVR RISC microcontroller supports powerful and efficient addressing

modes for access to the program memory (Flash) and data memory. This section

describes the different addressing modes supported by the AVR architecture. In the fig-

ures, OP means the operation code part of the instruction word. To simplify, not all

figures show the exact location of the addressing bits.

Figure 9. Direct Single Register Addressing

The operand is contained in register d (Rd).

Figure 10. Direct Register Addressing, Two Registers

Operands are contained in register r (Rr) and d (Rd). The result is stored in register d

(Rd).

Figure 11. I/O Direct Addressing

AT90S2313

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