ATmega325 带有32K系统内可编程Flash存储器

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Flash (Kbytes)	32
EEPROM (Kbytes)	1
SRAM (Bytes)	2048
Max I/O Pins	54
F.max (MHz)	16
Vcc (V)	1.8-5.5
16-bit Timers	1
8-bit Timer	2
PWM (channels)	4
RTC	Yes
SPI	1+USI
UART	1
TWI	USI
ISP	Yes
10-bit A/D (Channe)	8
Analog Comparator	Yes
Brown Out Detector	Yes
Watchdog	Yes
On Chip Oscillator	Yes
Hardware Multiplie	Yes
Interrupts	23
Ext Interrupts	17
Self Program Memor	Yes
Pb-Free Packages	TQFP 64 MLF 64

32-Kbyte self-programming Flash Program Memory, 2-Kbyte SRAM, 1-KByte EEPROM, 8 Channel 10-bit A/D-converter. JTAG interface for on-chip-debug. Up to 16 MIPS throughput at 16 MHz. 1.8 - 5.5 Volt Operation.

• 32KB 系统内可编程Flash存储器：ATmega325
• 32KB 系统内可编程Flash存储器：ATmega3250
• 64KB 系统内可编程Flash存储器：ATmega645
• 64KB 系统内可编程Flash存储器：ATmega6450

The ATmega325/3250/645/6450 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega325/3250/645/6450 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

ATmega325 产品特性

• High Performance, Low Power AVR(R) 8-Bit Microcontroller
• Advanced RISC Architecture
  – 130 Powerful Instructions – Most Single Clock Cycle Execution
  – 32 x 8 General Purpose Working Registers
  – Fully Static Operation
  – Up to 16 MIPS Throughput at 16 MHz
  – On-Chip 2-cycle Multiplier
• High Endurance Non-volatile Memory Segments
  – In-System Self-programmable Flash Program Memory
• 32K Bytes (ATmega325/ATmega3250)
• 64K Bytes (ATmega645/ATmega6450)
  – EEPROM
• 1K bytes (ATmega325/ATmega3250)
• 2K bytes (ATmega645/ATmega6450)
  – Internal SRAM
• 2K bytes (ATmega325/ATmega3250)
• 4K bytes (ATmega645/ATmega6450)
  – Write/Erase Cycles: 10,000 Flash/ 100,000 EEPROM
  – Data retention: 20 years at 85°C/100 years at 25°C(1)
  – Optional Boot Code Section with Independent Lock Bits
• In-System Programming by On-chip Boot Program
• True Read-While-Write Operation
  – Programming Lock for Software Security
• JTAG (IEEE std. 1149.1 compliant) Interface
  – Boundary-scan Capabilities According to the JTAG Standard
  – Extensive On-chip Debug Support
  – Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface
• Peripheral Features
  – Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode
  – One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode
  – Real Time Counter with Separate Oscillator
  – Four PWM Channels
  – 8-channel, 10-bit ADC
  – Programmable Serial USART
  – Master/Slave SPI Serial Interface
  – Universal Serial Interface with Start Condition Detector
  – Programmable Watchdog Timer with Separate On-chip Oscillator
  – On-chip Analog Comparator
  – Interrupt and Wake-up on Pin Change
• Special Microcontroller Features
  – Power-on Reset and Programmable Brown-out Detection
  – Internal Calibrated Oscillator
  – External and Internal Interrupt Sources
  – Five Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, and
  Standby
• I/O and Packages
  – 53/68 Programmable I/O Lines
  – 64-lead TQFP, 64-pad QFN/MLF, and 100-lead TQFP
• Speed Grade:
  – ATmega325V/ATmega3250V/ATmega645V/ATmega6450V:
  0 - 4 MHz @ 1.8 - 5.5V, 0 - 8 MHz @ 2.7 - 5.5V
  – ATmega325/3250/645/6450:
  0 - 8 MHz @ 2.7 - 5.5V, 0 - 16 MHz @ 4.5 - 5.5V
• Temperature range:
  – -40°C to 85°C Industrial
• Ultra-Low Power Consumption
  – Active Mode:
  1 MHz, 1.8V: 350 μA
  32 kHz, 1.8V: 20 μA (including Oscillator)
  – Power-down Mode:100 nA at 1.8V

ATmega325 订购型号

Speed (MHz)	Power Supply	Ordering Code	Package	Operation Range
8	1.8 - 5.5V	ATmega325V-8AI ATmega325V-8AU 环保无铅 ATmega325V-8MI ATmega325V-8MU 环保无铅	64A 64A 64M1 64M1	Industrial (-40°C to 85°C)
16	2.7 - 5.5V	ATmega325-16AI ATmega325-16AU 环保无铅 ATmega325-16MI ATmega325-16MU 环保无铅	64A 64A 64M1 64M1	Industrial (-40°C to 85°C)

ATmega325 应用技术支持与电子电路设计开发资源下载

1. ATMEL 爱特梅尔AVR 微控制器ATmega325 英文数据手册DataSheet 下载.PDF
2. Atmel 爱特梅尔AVR 微控制器简介.PDF (编号:Tech AVR 000)MLF 32
3. 面向新手的AVR 开发工具,及基本知识.PDF(编号:Tech AVR 001)
4. 使用AVR 定时/计数器的PWM功能设计要点 .PDF
5. AVR指令集（版本：0856G–AVR–07/08）
6. AVR 微控制器汽车应用解决方案 . pdf
7. AVR 微控制器选型指南. pdf
8. ATMEL 爱特梅尔公司全线产品目录. pdf