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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATMEGA16 датащи(PDF) 15 Page - ATMEL Corporation |
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ATMEGA16 датащи(HTML) 15 Page - ATMEL Corporation |
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15 / 315 page  15 ATmega16(L) 2466E–AVR–10/02 SRAM Data Memory Figure 9 shows how the ATmega16 SRAM Memory is organized. The lower 1120 Data Memory locations address the Register file, the I/O Memory, and the internal data SRAM. The first 96 locations address the Register file and I/O Memory, and the next 1024 locations address the internal data SRAM. The five different addressing modes for the data memory cover: Direct, Indirect with Dis- placement, Indirect, Indirect with Pre-decrement, and Indirect with Post-increment. In the Register file, registers R26 to R31 feature the indirect addressing pointer registers. The direct addressing reaches the entire data space. The Indirect with Displacement mode reaches 63 address locations from the base address given by the Y- or Z-register. When using register indirect addressing modes with automatic pre-decrement and post- increment, the address registers X, Y, and Z are decremented or incremented. The 32 general purpose working registers, 64 I/O Registers, and the 1024 bytes of inter- nal data SRAM in the ATmega16 are all accessible through all these addressing modes. The Register file is described in “General Purpose Register File” on page 8. Figure 9. Data Memory Map Register File R0 R1 R2 R29 R30 R31 I/O Registers $00 $01 $02 ... $3D $3E $3F ... $0000 $0001 $0002 $001D $001E $001F $0020 $0021 $0022 ... $005D $005E $005F ... Data Address Space $0060 $0061 $045E $045F ... Internal SRAM |
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