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Os motores de busca de Datasheet de Componentes eletrônicos |
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Os motores de busca de Datasheet de Componentes eletrônicos |
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ATTINY2313-20PU Folha de dados(PDF) 12 Page - ATMEL Corporation |
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ATTINY2313-20PU Folha de dados(HTML) 12 Page - ATMEL Corporation |
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12 / 231 page  12 ATtiny2313/V 2543I–AVR–04/06 Figure 4. AVR CPU General Purpose Working Registers Most of the instructions operating on the Register File have direct access to all registers, and most of them are single cycle instructions. As shown in Figure 4, each register is also assigned a data memory address, mapping them directly into the first 32 locations of the user Data Space. Although not being phys- ically implemented as SRAM locations, this memory organization provides great flexibility in access of the registers, as the X-, Y- and Z-pointer registers can be set to index any register in the file. The X-register, Y-register, and Z-register The registers R26..R31 have some added functions to their general purpose usage. These registers are 16-bit address pointers for indirect addressing of the data space. The three indirect address registers X, Y, and Z are defined as described in Figure 5. Figure 5. The X-, Y-, and Z-registers In the different addressing modes these address registers have functions as fixed dis- placement, automatic increment, and automatic decrement (see the instruction set reference for details). 7 0 Addr. R0 0x00 R1 0x01 R2 0x02 … R13 0x0D General R14 0x0E Purpose R15 0x0F Working R16 0x10 Registers R17 0x11 … R26 0x1A X-register Low Byte R27 0x1B X-register High Byte R28 0x1C Y-register Low Byte R29 0x1D Y-register High Byte R30 0x1E Z-register Low Byte R31 0x1F Z-register High Byte 15 XH XL 0 X-register 70 7 0 R27 (0x1B) R26 (0x1A) 15 YH YL 0 Y-register 70 7 0 R29 (0x1D) R28 (0x1C) 15 ZH ZL 0 Z-register 70 7 0 R31 (0x1F) R30 (0x1E) |
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