ATMEGA644P-20AU

8 位 PicoPower megaAVR 系列微控制器，Atmel此系列 megaAVR 微控制器具有 picoPower 技术 — 非常适合节能。 它们提供大量程序和数据内存，性能高达 20 MIPS。 **picoPower megaAVR 微控制器的特色和优点** •片上闪存 •SRAM •内部 EEPROM •SPI •TWI I²C •USART、USB、CAN 和 LIN 接口 •监控计时器 •精密振荡器 •GPIO 引脚 •ADC •DAC •内置温度传感器 •内部参考电压 •掉电检测器### AVR 微控制器，Atmel

The is a 8-bit low-power CMOS Microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega644P achieves throughputs approaching 1 MIPS per MHz allowing the system designed 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.

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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