Atmel ATmega328P Xplained Mini MEGA328P-XMINI MEGA328P-XMINI Ficha De Dados
Códigos do produto
MEGA328P-XMINI
19
ATmega48A/PA/88A/PA/168A/PA/328/P [DATASHEET]
Atmel-8271H-AVR- ATmega-Datasheet_08/2014
8.3
SRAM Data Memory
shows how the ATmega48A/PA/88A/PA/168A/PA/328/P SRAM Memory is organized.
The ATmega48A/PA/88A/PA/168A/PA/328/P is a complex microcontroller with more peripheral units than can
be supported within the 64 locations reserved in the Opcode for the IN and OUT instructions. For the Extended
I/O space from 0x60 - 0xFF in SRAM, only the ST/STS/STD and LD/LDS/LDD instructions can be used.
be supported within the 64 locations reserved in the Opcode for the IN and OUT instructions. For the Extended
I/O space from 0x60 - 0xFF in SRAM, only the ST/STS/STD and LD/LDS/LDD instructions can be used.
The lower 768/1280/1280/2303 data memory locations address both the Register File, the I/O memory,
Extended I/O memory, and the internal data SRAM. The first 32 locations address the Register File, the next 64
location the standard I/O memory, then 160 locations of Extended I/O memory, and the next
512/1024/1024/2048 locations address the internal data SRAM.
Extended I/O memory, and the internal data SRAM. The first 32 locations address the Register File, the next 64
location the standard I/O memory, then 160 locations of Extended I/O memory, and the next
512/1024/1024/2048 locations address the internal data SRAM.
The five different addressing modes for the data memory cover: Direct, Indirect with Displacement, Indirect,
Indirect with Pre-decrement, and Indirect with Post-increment. In the Register File, registers R26 to R31 feature
the indirect addressing pointer registers.
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.
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.
registers X, Y, and Z are decremented or incremented.
The 32 general purpose working registers, 64 I/O Registers, 160 Extended I/O Registers, and the
512/1024/1024/2048 bytes of internal data SRAM in the ATmega48A/PA/88A/PA/168A/PA/328/P are all
accessible through all these addressing modes. The Register File is described in
512/1024/1024/2048 bytes of internal data SRAM in the ATmega48A/PA/88A/PA/168A/PA/328/P are all
accessible through all these addressing modes. The Register File is described in
.
Figure 8-3.
Data Memory Map
32 Registers
64 I/O Registers
Internal SRAM
(512/1024/1024/2048 x 8)
0x0000 - 0x001F
0x0020 - 0x005F
0x0020 - 0x005F
0x02FF/0x04FF/0x4FF/0x08FF
0x0060 - 0x00FF
Data Memory
160 Ext I/O Reg.
0x0100