Features• High-performance, Low-power AVR® 8-bit Microcontroller• Advanced RISC Architecture- 131 Powerful Instructions - Most Single-clock Cycle Execution- 32 x 8 General Purpose Working Registers- Fully Static Operation- Up to 20 MIPS Throughput at 20 MHz• High Endurance Non-volatile Memory segments- 64K Bytes of In-System Self-programmable Flash program memory- 2K Bytes EEPROM- 4K Bytes Internal SRAM- Write/Erase cyles: 10,000 Flash/100,000 EEPROM(1)(3)- Data retention: 20 years at 85°C/100 years at 25°C(2)(3)- Optional Boot Code Section with Independent Lock BitsIn-System Programming by On-chip Boot ProgramTrue 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 Prescalers and Compare Modes- One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and CaptureMode- Real Time Counter with Separate Oscillator- Six PWM Channels- 8-channel, 10-bit ADCDifferential mode with selectable gain at 1x, 10x or 200x- Byte-oriented Two-wire Serial Interface- One Programmable Serial USART- Master/Slave SPI 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 RC Oscillator- External and Internal Interrupt Sources- Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standbyand Extended Standby• I/O and Packages- 32 Programmable I/O Lines- 40-pin PDIP, 44-lead TQFP, and 44-pad QFN/MLF• Speed Grades- ATmega644V: 0 - 4MHz @ 1.8 - 5.5V, 0 - 10MHz @ 2.7 - 5.5V- ATmega644: 0 - 10MHz @ 2.7 - 5.5V, 0 - 20MHz @ 4.5 - 5.5V• Power Consumption at 1 MHz, 3V, 25°C- Active: 240 ?A @ 1.8V, 1MHz- Power-down Mode: 0.1 ?A @ 1.8V
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