Overview
The ATmega644PA-AUR is an enhanced version of the ATmega644P microcontroller, part of Microchip's AVR 8-bit RISC family. It combines high computational performance (up to 20 MIPS at 20MHz) with low power consumption, making it ideal for battery-powered and energy-efficient applications. The '-AUR' suffix denotes the TQFP-44 package variant, designed for automated assembly processes. With its 64KB self-programming flash memory and extensive peripheral set (including USART, SPI, and I2C interfaces), it serves as a versatile solution for complex embedded designs.
Structure and Working Principle
The microcontroller features a Harvard architecture with separate buses for program and data memory. The 8-bit AVR CPU executes most instructions in a single clock cycle, achieving throughput of 1 MIPS per MHz. The chip integrates analog comparators, PWM channels, and a 10-bit ADC for mixed-signal applications. Non-volatile memory sections include flash for firmware, EEPROM for parameter storage, and fuse bits for configuration. The advanced power management unit supports multiple sleep modes, reducing consumption to below 1µA in power-down mode while maintaining SRAM retention.
Key Features
Notable features include 32 general-purpose I/O lines, four flexible timer/counters with PWM, and a programmable watchdog timer. The enhanced power-on reset and brown-out detection circuits improve reliability in fluctuating power conditions. The PA revision offers improved power efficiency (typically 0.2mA/MHz in active mode) and reduced sensitivity to ESD compared to earlier versions. All I/O pins feature programmable pull-up resistors and symmetrical drive characteristics for simplified circuit design.
Application Areas
Industrial applications include motor control systems, PLCs, and sensor interfaces where its robust design (-40°C to +85°C operational range) excels. Building automation systems utilize its communication peripherals for MODBUS or BACnet protocols. In consumer electronics, it powers smart home devices, educational kits (such as Arduino-compatible boards), and hobbyist projects. Medical devices benefit from its deterministic response times and low electromagnetic interference characteristics.
Maintenance and Precautions
When designing with this microcontroller, ensure proper decoupling (typically 100nF ceramic capacitors per power pair) and adhere to layout guidelines for high-frequency signals. The internal RC oscillator (8MHz calibrated) may require external crystal for timing-critical applications. During programming, verify fuse bit settings to avoid accidentally disabling the ISP interface. For production environments, implement ESD control measures (IEC 61000-4-2 compliance recommended) during handling and assembly.
B2B Procurement Guide
For volume purchases (1k+ units), direct engagement with Microchip's authorized distributors (e.g., Arrow, Avnet) typically yields 15-30% cost reductions. Lead times average 6-8 weeks for non-stocked quantities. Consider alternate part numbers (ATmega644PA-MU for QFN package) if the TQFP-44 form factor isn't essential. Verify RoHS 3 compliance documentation for EU market shipments. Some distributors offer programming services for an additional fee, reducing in-house setup costs.
Related Manufacturers
- 主营：放大器、检测器、滤波器、调制器、发射器、接收器、衰减器、解调器、变压器、收发器、偏置器、振荡器、rfid天线、终端负载、隔直流器、微波射频、集成电路、同轴开关、接入监控ic、频率综合器、射频适配器、定向耦合器、耦合器电桥、多路复用器、rfid读取模块
- 主营：单片机、RENESAS瑞萨、TI德州仪器、ADI亚德诺、国产芯片替代、XILINX/赛灵思、可编程逻辑器件、电源芯片、接口芯片、DSP数字信号处理器、时钟芯片、中科芯、阿尔特拉、存储芯片、以太网控制芯片、射频芯片、恩智浦、ST意法、中微爱芯、转换芯片、芯科、三星存储
- 主营：2.0-3.0mh、tps51275c、48mhz64kb、rtl8211dn、5.5v10.8v、a83asot23、opa2227pa、放大器、sh93p426f、5177984-6、opa2131ua、tb6560ahq、tb135xqfn、稳压器、1376357-8、tda12067h、dl-115bga、调节器、c14100kjl、rda8851ml、ad7541akn、变压器、控制器、lt1054cn8、连接器
- 主营：rdt2302al、nvt2002dp、1n4567a-1、放大器、开关器、意法半、flashpro6、稳压器、tc647beua、xt30upb-m、接插件、flashpro5、控制器、1565986-1、1410187-3、2294700-r、2302800-r、连接器、742792796、ese23j101、监视器、dha-08tqr、6223a-srd、2301200-r、钽电容
- 主营：开发板、jan2n7335、tl051aijg、ltm4651iy、ltm8073iy、jan1n6101、8102303ca、比较器、ds3177n+t、snj54f04j、解码器、ds26f31mj、hv518pj-g、电源管、ina129sjd、sn54hc86j、54ls195dm、lt1013cjg、snj54f20j、ltm8055iy、mt9173ae1、8412902la、检测器、混频器、二极管
- 主营：MCU微处理器、存储芯片、数字芯片、电容、网络芯片、可控硅
- 主营：ADI、ST、怀格、仙童、TI/州仪器、ATMEL—爱特梅尔、CYPRESS-赛普拉斯、SAMSUNG—三星、RENESAS—瑞萨、WINBOND—华邦、AVAGO—安华高、VISHAY—威世、BROADCOM—博通、NKK、科索、欧姆龙、AB/罗克韦尔、西门子、XILINX—赛灵思、TDK、INFINEON—英飞凌
- 主营：开关器、xd1008-qh、500021259、2rh1-0002、hsmc-c120、qsmf-c17e、传感器、封装bga、isl5216ki、稳压器、hsmf-c143、ad536ajhz、lt1377cs8、hmc493lp3、iso1i813t、tga2509fl、变压器、控制器、连接器、adns-7530、电位器、d8622armz、acmd-7402、解调器、wta66pcjt
- 主营：驱动器、模拟开关、微控制器、参考电压、电池管理、视频开关ic、仪表放大器、音频放大器、开关稳压器、数字隔离器、精密放大器、运算放大器、点火控制器、开关控制器、可编程门阵列、接口集成电路、电容电阻
- 主营：tsot-23-6、int-a-pak、svf13n50f、me25n06ic、ltfbga196、hlqfp-100、sfr16s20t、样品包、sfr20s20t、二极管、lqfp64-cn、lqfp32-ch、lqfp32-cn、sot-223-3、lqfp80-my、lqfp64-yh、tsop48-my、svf10n60f、vqfn-hr10、svf10n60k、svf10n60t、ssop16-ph、ufqfpn-20、lqfp32-my、ufqfpn-28
- 主营：集成电路(ic)、电子元器件
- 主营：电子元器件配单、IC集成电路、存储芯片、二、三极管、连接器、开关器件
- 主营：nc7s04m5x、nc7s14m5x、cs82c55az、pcm5121pw、opa379aid、pcm2705db、pcm5122pw、存储器、连接器、传感器、pcm5102pw、sn74ls30n、adg412bnz、ad8278brmz、pcm1803dbr、adg811yruz、ad5312armz、adg612yruz、ad5304armz、adg636yruz、nc7sz32m5x、uln2003adr、ad5305brmz、tps2051adr、ad5337armz
- 主营：收发器、处理器、控制器、解码器、放大器、adi模数、htc电源、lm339apwr、整流器、存储器、74hc245pw、连接器、sst存储、计数器、滤波器、adi数模
- 主营：TI、ST、亚德诺、富士通、XILINX、MAXIM、微芯