MICROCHIP ATMEGA644PA-AU

The Atmel ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P 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 ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed. The AVR core combines a rich instruction set with 32 general purpose working registers. All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers. The Atmel ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P provide the following features: 16/32/64/128Kbytes of In-System Programmable Flash with Read-While-Write capabilities, 512/1K/2K/4Kbytes EEPROM, 1/2/4/16Kbytes SRAM, 32 general purpose I/O lines, 32 general purpose working registers, Real Time Counter (RTC), three (four for ATmega1284/1284P) flexible Timer/Counters with compare modes and PWM, 2 USARTs, a byte oriented two-wire Serial Interface, a 8-channel, 10-bit ADC with optional differential input stage with programmable gain, programmable Watchdog Timer with Internal Oscillator, an SPI serial port, IEEE std. 1149.1 compliant JTAG test interface, also used for accessing the On-chip Debug system and programming and six software selectable power saving modes. The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, SPI port, and interrupt system to continue functioning. The Power-down mode saves the register contents but freezes the Oscillator, disabling all other chip functions until the next interrupt or Hardware Reset. In Power-save mode, the asynchronous timer continues to run, allowing the user to maintain a timer base while the rest of the device is sleeping. The ADC Noise Reduction mode stops the CPU and all I/O modules except Asynchronous Timer and ADC, to minimize switching noise during ADC conversions. In Standby mode, the Crystal/Resonator Oscillator is running while the rest of the device is sleeping. This allows very fast start-up combined with low power consumption. In Extended Standby mode, both the main Oscillator and the Asynchronous Timer continue to run. Atmel offers the QTouch library for embedding capacitive touch buttons, sliders and wheels functionality into AVR microcontrollers. The patented charge-transfer signal acquisition offers robust sensing and includes fully debounced reporting of touch keys and includes Adjacent Key Suppression technology for unambiguous detection of key events. The easy-to-use QTouch Suite toolchain allows you to explore.

• High-performance, low-power 8-bit Atmel AVR Microcontroller
• Advanced RISC architecture
• 131 powerful Instructions – most single-clock cycle execution
• 32×8 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
• 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
• 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 1×, 10× or 200×
• 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
• 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
• 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)