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ATmega1281 带有128K系统内可编程Flash存储器

Flash (Kbytes)	128
EEPROM (Kbytes)	4
SRAM (Bytes)	8192
Max I/O Pins	54
F.max (MHz)	16
Vcc (V)	1.8-5.5
16-bit Timers	4
8-bit Timer	2
PWM (channels)	9
RTC	Yes
SPI	1+USART
UART	2
TWI	Yes
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	48
Ext Interrupts	17
Self Program Memor	Yes
Packages	TQFP 64  MLF 64

128-Kbyte self-programming Flash Program Memory, 8-Kbyte SRAM, 4-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.

• 64KB 系统内可编程Flash存储器：ATmega640
• 128KB 系统内可编程Flash存储器：ATmega1280
• 128KB 系统内可编程Flash存储器：ATmega1281
• 256KB 系统内可编程Flash存储器：ATmega2560
• 256KB 系统内可编程Flash存储器：ATmega2561

The ATmega640/1280/1281/2560/2561 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 ATmega640/1280/1281/2560/2561 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

ATmega1281 特性

• High Performance, Low Power AVR® 8-Bit Microcontroller
• Advanced RISC Architecture
  – 135 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
  – 64K/128K/256K Bytes of In-System Self-Programmable Flash
  – 4K Bytes EEPROM
  – 8K Bytes Internal SRAM
  – Write/Erase Cycles:10,000 Flash/100,000 EEPROM
  – Data retention: 20 years at 85°C/ 100 years at 25°C
  – 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
  Endurance: Up to 64K Bytes Optional External Memory Space
• 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
  – Four 16-bit Timer/Counter with Separate Prescaler, Compare- and Capture Mode
  – Real Time Counter with Separate Oscillator
  – Four 8-bit PWM Channels
  – Six/Twelve PWM Channels with Programmable Resolution from 2 to 16 Bits
  (ATmega1281/2561, ATmega640/1280/2560)
  – Output Compare Modulator
  – 8/16-channel, 10-bit ADC (ATmega1281/2561, ATmega640/1280/2560)
  – Two/Four Programmable Serial USART (ATmega1281/2561,ATmega640/1280/2560)
  – Master/Slave SPI Serial Interface
  – Byte Oriented 2-wire Serial Interface
  – 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
  – Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby,and Extended Standby
• I/O and Packages
  – 54/86 Programmable I/O Lines (ATmega1281/2561, ATmega640/1280/2560)
  – 64-pad QFN/MLF, 64-lead TQFP (ATmega1281/2561)
  – 100-lead TQFP, 100-ball CBGA (ATmega640/1280/2560)
  – RoHS/Fully Green
• Temperature Range:-40°C to 85°C Industrial
• Ultra-Low Power Consumption
  – Active Mode: 1 MHz, 1.8V: 500 μA
  – Power-down Mode: 0.1 μA at 1.8V
• Speed Grade:
  – ATmega640V/ATmega1280V/ATmega1281V:
  0 - 4 MHz @ 1.8 - 5.5V, 0 - 8 MHz @ 2.7 - 5.5V
  – ATmega2560V/ATmega2561V:
  0 - 2 MHz @ 1.8 - 5.5V, 0 - 8 MHz @ 2.7 - 5.5V
  – ATmega640/ATmega1280/ATmega1281:
  0 - 8 MHz @ 2.7 - 5.5V, 0 - 16 MHz @ 4.5 - 5.5V
  – ATmega2560/ATmega2561:0 - 16 MHz @ 4.5 - 5.5V

ATmega1281 订购型号

Speed (MHz)	Power Supply	Ordering Code	Package	Operation Range
8	1.8-5.5V	ATmega1281V-8AU ATmega1281V-8MU	64A 64M2	Industrial (-40°C to 85°C)
16	2.7-5.5V	ATmega1281-16AU ATmega1281-16MU	64A 64M2	Industrial (-40°C to 85°C)

ATmega1281 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ATmega1280 数据手册DataSheet 下载. PDF（完整版）
2. ATMEL 爱特梅尔AVR 微控制器ATmega1280 数据手册DataSheet 下载 .PDF（简洁版）
3. Atmel 爱特梅尔AVR 微控制器简介.PDF (编号:Tech AVR 000)MLF 32
4. 面向新手的AVR 开发工具,及基本知识.PDF(编号:Tech AVR 001)
5. 使用AVR 定时/计数器的PWM功能设计要点 .PDF
6. AVR指令集（版本：0856G–AVR–07/08）
7. AVR 微控制器汽车应用解决方案 . pdf
8. AVR 微控制器选型指南. pdf
9. ATMEL 爱特梅尔公司全线产品目录. pdf