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7810C–AVR–10/12
Atmel ATmega328P [Preliminary]
7.
AVR Memories
7.1
Overview
This section describes the different memories in the ATmega328P. The AVR architecture has
two main memory spaces, the Data Memory and the Program Memory space. In addition, the
ATmega328P features an EEPROM Memory for data storage. All three memory spaces are lin-
ear and regular.
7.2
In-System Reprogrammable Flash Program Memory
The ATmega328P contains 32K bytes On-chip In-System Reprogrammable Flash memory for
program storage. Since all AVR instructions are 16 or 32 bits wide, the Flash is organized as
16K x 16. For software security, the Flash Program memory space is divided into two sections,
Boot Loader Section and Application Program Section in ATmega328P. See SELFPRGEN
description in section “SPMCSR – Store Program Memory Control and Status Register” on page
269 and page 284for more details.
The Flash memory has an endurance of at least 10,000 write/erase cycles. The ATmega328P
Program Counter (PC) is 14 bits wide, thus addressing the 16K program memory locations. The
operation of Boot Program section and associated Boot Lock bits for software protection are
described in detail in “Self-Programming the Flash, ATmega328P” on page 263 and “Boot
Loader Support – Read-While-Write Self-Programming” on page 271. “Memory Programming”
on page 286 contains a detailed description on Flash Programming in SPI- or Parallel Program-
ming mode.
Constant tables can be allocated within the entire program memory address space (see the LPM
– Load Program Memory instruction description).
Timing diagrams for instruction fetch and execution are presented in “Instruction Execution Tim-
ing” on page 13.
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相关代理商/技术参数
ATMEGA328P-15MZ 功能描述:8位微控制器 -MCU 32KB In-system Flash 20MHz 1.8V-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ATMEGA328P-20AU 制造商:Atmel Corporation 功能描述:MCU 8-bit ATmega AVR RISC 32KB Flash 3.3V/5V 32-Pin TQFP
ATMEGA328P20MU 制造商:Atmel Corporation 功能描述:MCU 8-Bit ATmega AVR RISC 32KB Flash 3.3V/5V 32-Pin MLF
ATMEGA328P-AN 功能描述:8位微控制器 -MCU AVR 32K FLSH 2K SRAM 1KB EE-20 MHZ 105C RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ATMEGA328P-ANR 功能描述:8位微控制器 -MCU AVR 32K FLSH 2K SRAM 1KB EE-20 MHZ 105C RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ATMEGA328P-AU 功能描述:8位微控制器 -MCU 32KB In-system Flash 20MHz 1.8V-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ATMEGA328P-AU SL383 制造商:Atmel Corporation 功能描述:AVR 32K FLASH, 1K EE, 2K SRAM - 20 MHZ, TQFP, IND TEMP GREEN - Tape and Reel
ATMEGA328P-AUR 功能描述:8位微控制器 -MCU AVR 32K FLSH 2K SRAM 1KB EE-20MHz IND RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT