ATMEGA644-20PU

8 位 megaAVR® 微控制器，32KB 到 256KB 闪存，Atmel我们在 RS Components 提供多款来自 Atmel 的 megaAVR 8 位微控制器。 每个微控制器均基于增强型 RISC 体系结构，并具有 QTouch 库支持。 所有微控制器类型具有不同 Kb 的系统内可编程内存、EEPROM 和 SRAM 以及不同引脚和封装类型。 **megaAVR 8 位微控制器类型** •ATmega32 •ATmega64 •ATmega128 •ATmega324 •ATmega325 •ATmega406 •ATmega640 •ATmega644 •ATmega645 •ATmega1280 •ATmega1281 •ATmega1284 •ATmega2560 •ATmega2561 •ATmega3250 •ATmega6450

The is a 8-bit high-performance low-power 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, real time counter, three flexible timer/counters with compare modes and PWM, 2 USARTs, byte oriented 2-wire serial interface, 8-channel/10-bit A/D converter with optional differential input stage with programmable gain, programmable watchdog timer with internal oscillator, SPI serial port, JTAG IEEE 1149.1 compliant test interface for on-chip debugging and six software selectable power saving modes. The device operates between 2.7 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 - Fully static operation

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High endurance, non-volatile memory segments

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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