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　　关于ATMEGA1281：
　　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
　　Non-volatile Program and Data Memories
　　– 64K/128K/256K Bytes of In-System Self-Programmable Flash Endurance: 10,000 Write/Erase Cycles
　　– Optional Boot Code Section with Independent Lock Bits In-System Programming by On-chip Boot Program True Read-While-Write Operation
　　– 4K Bytes EEPROM Endurance: 100,000 Write/Erase Cycles
　　– 8K Bytes Internal SRAM
　　– Up to 64K Bytes Optional External Memory Space
　　– 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
　　– 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: 510 μA
　　– Power-down Mode: 0.1 μA at 1.8V
　　Speed Grade (see “Maximum speed vs. VCC” on page 377):
　　– 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