Arduino Uno 外文文献翻译

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1、附录A英文原文ArduinoUno1OverviewTheArduinoUnoisamicrocontrollerboardbasedontheATmega328.Ithas14digitalinput/outputpins(ofwhich6canbeusedasPWMoutputs),6analoginputs,a16MHzceramicresonator,aUSBconnection,apowerjack,anICSPheader,andaresetbutton.Itcontainseverythingneededtosup

2、portthemicrocontroller;simplyconnectittoacomputerwithaUSBcableorpoweritwithaAC-to-DCadapterorbatterytogetstarted.TheUnodiffersfromallprecedingboardsinthatitdoesnotusetheFTDIUSB-to-serialdriverchip.Instead,itfeaturestheAtmega16U2(Atmega8U2uptoversionR2)programmedasaUS

3、B-to-serialconverter.Revision2oftheUnoboardhasaresistorpullingthe8U2HWBlinetoground,makingiteasiertoputintoDFUmode.Revision3oftheboardhasthefollowingnewfeatures:1.0pinout:addedSDAandSCLpinsthatareneartotheAREFpinandtwoothernewpinsplacedneartotheRESETpin,theIOREFthata

4、llowtheshieldstoadapttothevoltageprovidedfromtheboard.Infuture,shieldswillbecompatiblewithboththeboardthatusestheAVR,whichoperateswith5VandwiththeArduinoDuethatoperateswith3.3V.Thesecondoneisanotconnectedpin,thatisreservedforfuturepurposes.StrongerRESETcircuit.Atmega

5、16U2replacethe8U2."Uno"meansoneinItalianandisnamedtomarktheupcomingreleaseofArduino1.0.TheUnoandversion1.0willbethereferenceversionsofArduino,movingforward.TheUnoisthelatestinaseriesofUSBArduinoboards,andthereferencemodelfortheArduinoplatform;foracomparisonwithprevio

6、usversions,seetheindexofArduinoboards.172SummaryMicrocontroller:ATmega328OperatingVoltage:5VInputVoltage(recommended):7-12VInputVoltage(limits):6-20VDigitalI/OPins:14(ofwhich6providePWMoutput)AnalogInputPins:6DCCurrentperI/OPin:40mADCCurrentfor3.3VPin:50mAFlashMemory

7、:32KB(ATmega328)ofwhich0.5KBusedbybootloaderSRAM:2KB(ATmega328)EEPROM:1KB(ATmega328)ClockSpeed:16MHzLength:68.6mmWidth:53.4mmWeight:25g173PowerTheArduinoUnocanbepoweredviatheUSBconnectionorwithanexternalpowersupply.Thepowersourceisselectedautomatically.External(non-U

8、SB)powercancomeeitherfromanAC-to-DCadapter(wall-wart)orbattery.Theadaptercanbeconnectedbyplugginga2.1mmcenter-positiveplugintothebo