Features • High Performance, Low Power Atmel® AVR® 8-Bit Microcontroller • Advanced RISC Architecture – 135 Powerful Instructions – Most Single Clock Cycle Execution – 32 × 8 General Purpose Working Registers – Fully Static Operation – Up to 16 MIPS Throughput at 16MHz – On-Chip 2-cycle Multiplier • High Endurance Non-volatile Memory Segments – 64K/128K/256KBytes of In-System Self-Programmable Flash – 4Kbytes EEPROM – 8Kbytes 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 64Kbytes Optional External Memory Space • Atmel® QTouch® library support – Capacitive touch buttons, sliders and wheels – QTouch and QMatrix acquisition – Up to 64 sense channels • 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: 1MHz, 1.8V: 500μA – Power-down Mode: 0.1μA at 1.8V • Speed Grade: – ATmega640V/ATmega1280V/ATmega1281V: • 0 - 4MHz @ 1.8V - 5.5V, 0 - 8MHz @ 2.7V - 5.5V – ATmega2560V/ATmega2561V: • 0 - 2MHz @ 1.8V - 5.5V, 0 - 8MHz @ 2.7V - 5.5V – ATmega640/ATmega1280/ATmega1281: • 0 - 8MHz @ 2.7V - 5.5V, 0 - 16MHz @ 4.5V - 5.5V – ATmega2560/ATmega2561: • 0 - 16MHz @ 4.5V - 5.5V