Atmel ATmega644 overview
Atmel ATmega644 Microprocessor | 8-bit Microcontroller with 64K Bytes In-System Programmable Flash 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 Register...
What is Atmel ATmega644?
Atmel ATmega644 Microprocessor | 8-bit Microcontroller with 64K Bytes In-System Programmable Flash 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 Register...
Product details
Manufactured byAtmel
Product group8-bit Microcontrollers
DescriptionAtmel ATmega644 Microprocessor | 8-bit Microcontroller with 64K Bytes In-System Programmable Flash
Key FeaturesHigh-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
OverviewThe ATmega644 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega644 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
Manufacturer, product group, and supply
See who makes this product, where it belongs, and where available inventory may be listed.
Product group
8-bit Microcontrollers
Explore 8-bit Microcontrollers
Available from
Sourcing support available
Start a sourcing request