AT90S8535 datasheet(12/127 Pages) ATMEL

Part #	AT90S8535

Description	8-bit Microcontroller with 8K Bytes In-System Programmable Flash

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Manufacturer	ATMEL [ATMEL Corporation]

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AT90S/LS8535

1041H–11/01

Program and Data

Addressing Modes

The AT90S8535 AVR RISC microcontroller supports powerful and efficient addressing

modes for access to the program memory (Flash) and data memory (SRAM, register file

and I/O memory). This section describes the different addressing modes supported by

the AVR architecture. 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 9. Direct Single Register Addressing

The operand is contained in register d (Rd).

Register Direct, Two Registers

Rd And Rr

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).

I/O Direct

Figure 11. I/O Direct Addressing

Operand address is contained in six bits of the instruction word. n is the destination or

source register address.

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