ATMEGA644A-AU

The ATmega164A/PA/324A/PA/644A/PA/1284/P is a low power, CMOS 8-bit microcontrollers based on the AVR enhanced RISC architecture. The ATmega164A/PA/324A/PA/644A/PA/1284/P is a 40/49-pins device ranging from 16 KB to 128 KB Flash, with 1 KB to 16 KB SRAM, 512 Bytes to 4 KB EEPROM. By executing instructions in a single clock cycle, the devices achieve CPU throughput approaching one million instructions per second (MIPS) per megahertz, allowing the system designer to optimize power consumption versus processing speed.

Key features

• High-performance, low-power 8-bit AVR Microcontroller
• Advanced RISC architecture
• 131 powerful Instructions – most single-clock cycle execution
• 32 general purpose working registers
• Fully static operation
• Up to 20MIPS throughput at 20MHz
• On-chip 2-cycle multiplier
• High endurance non-volatile memory segments
• 16/32/64/128KBytes of In-System Self-programmable Flash program memory
• 512/1K/2K/4KBytes EEPROM
• 1/2/4/16KBytes Internal SRAM
• Write/Erase Cycles: 10,000 Flash/ 100,000 EEPROM
• Data retention: 20 years at 85℃/ 100 years at 25℃
• 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
• 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 Prescalers and Compare Modes
• One/two 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
• Two 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, 44-pad VQFN/QFN/MLF
• 44-pad DRQFN 49-ball VFBGA
• Operating Voltages 1.8 - 5.5V
• Speed Grades
• 0 - 4MHz @ 1.8 - 5.5V
• 0 - 10MHz @ 2.7 - 5.5V
• 0 - 20MHz @ 4.5 - 5.5V
• Power Consumption at 1MHz, 1.8V, 25℃
• Active: 0.4mA
• Power-down Mode: 0.1μA
• Power-save Mode: 0.6μA (Including 32kHz RTC)