Features

• 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

Pin Configurations

                                                  Figure 1. TQFP-pinout ATmega640/1280/2560