ATMEGA329P/V Ver la hoja de datos (PDF) - Atmel Corporation

Número de pieza

componentes Descripción

Fabricante

ATMEGA329P/V

8-bit Microcontroller with 32K Bytes In-System Programmable Flash

Atmel Corporation 

Figure 6-1. Program Memory Map

Program Memory

0x0000

Application Flash Section

6.3 SRAM Data Memory

Boot Flash Section

0x3FFF

Figure 6-2 shows how the ATmega329P/3290P SRAM Memory is organized.

The ATmega329P/3290P 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.

The lower 2304 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 2048 locations address the internal data SRAM.

The five different addressing modes for the data memory cover: Direct, Indirect with Displace-

ment, 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-incre-

ment, the address 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 2,048 bytes of internal data SRAM in the ATmega329P/3290P are all accessible through all

these addressing modes. The Register File is described in ”General Purpose Register File” on

page 14.

20 ATmega329P/3290P

8021A–AVR–12/06

Share Link: