Product Description
Microcontroller with 64K Bytes In-System Programmable FlashATmega644/VFeatures• High-performance, Low-power Atmel® AVR® 8-bit Microcontroller• Advanced RISC Architecture– 131 Powerful Instructions – Most Single-clock Cycle Execution– 32 × 8 General Purpose Working Registers– Fully Static Operation– Up to 20 MIPS Throughput at 20MHz• High Endurance Non-volatile Memory segments– 64 Kbytes of In-System Self-programmable Flash program memory– 2 Kbytes EEPROM– 4 Kbytes 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 Bits In-System Programming by On-chip Boot Program True 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 Capture Mode– Real Time Counter with Separate Oscillator– Six PWM Channels– 8-channel, 10-bit ADC Differential 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, Standby and 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.
8V - 5.
5V, 0 - 10MHz @ 2.
7V - 5.
5V– ATmega644: 0 - 10MHz @ 2.
7V - 5.
5V, 0 - 20MHz @ 4.
5V - 5.
5V• Power Consumption at 1MHz, 3V, 25·C– Active: 240µA @ 1.
8V, 1MHz– Power-down Mode: 0.1µA @ 1.
8V
