ATMEGA644A-AU
数据手册.pdfATMEL ATMEGA644A-AU 微控制器, 8位, 低功率高性能, ATmega, 20 MHz, 64 KB, 4 KB, 44 引脚, TQFP
The is a 8-bit high-performance AVR RISC-based Microcontroller combines 64kB ISP flash memory with read-while-write capabilities, 2kB EEPROM, 4kB SRAM, 32 general purpose I/O lines, 32 general purpose working registers, a real time counter, three flexible timer/counters with compare modes and PWM, two USARTs, a byte oriented 2-wire serial interface, an 8-channel 10-bit A/D converter with optional differential input stage with programmable gain, programmable watchdog timer with internal oscillator, SPI serial port, a JTAG IEEE 1149.1 compliant test interface for on-chip debugging and programming and six software selectable power saving modes. The device operates between 1.8 to 5.5V. By executing powerful instructions in a single clock cycle, the device achieves throughputs approaching 1 MIPS per MHz, balancing power consumption and processing speed.
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- Advanced RISC architecture - On-chip 2-cycle multiplier
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- High endurance, non-volatile memory segments
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- QTouch® library support - Capacitive touch buttons, sliders and wheels
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- JTAG IEEE 1149.1 compliant interface
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- Peripheral features - Real time counter with separate oscillator
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- Power-on reset POR and programmable brown-out detection
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- Internal calibrated RC oscillator
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- External and internal interrupt sources
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- Six sleep modes - Idle, ADC noise reduction, power-save, power-down, standby and extended standby