机械工程系车辆工程-外文翻译-汽车防撞预警系统设计

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1、中北大学信息商务学院毕业设计说明书外文文献原文及译文学生姓名：王博文学号：1301034224系名:机械工程系专业：车辆工程论文题目：汽车防撞预警系统设计指导教师：罗佳2017年5月19日AT89C2051MicrocontrollerInstructionsLIFeatures•CompatiblewithMCS-51Products•2KbytesofReprogrammableFlashMemoryEndurance:1,000Write/EraseCycles•2.7Vto6VOperatingRa

2、nge•FullyStaticOperation:0Hzto24MHz•Two-LevelProgramMemoryLock•128x8-BitInternalRAM•15ProgrammableI/OLines•Two16-BitTuner/Counters•SixInterruptSources•PiogrammableSerialUARTChannel•DirectLEDDriveOutputs•On-ChipAnalogComparator•LowPowerIdleandPowerDownModes

3、L2DescriptionTheAT89C2051isalow-voltage,high-performanceCMOS8七itmicrocomputerwith2KbytesofFlashprogrammableanderasablereadonlymemory(PEROM).ThedeviceismanufacturedusingAtmePshighdensitynonvolatilememorytechnologyandiscompatiblewiththeindustiystandardMCS-51

4、instructionsetandpinout.Bycombiningaversatile8-bitCPUwithFlashonamonolithicchip,theAtmelAT89C2051isapowerfulmicrocomputerwhichprovidesahighlyflexibleandcosteffectivesolutiontomanyembeddedcontrolapplications-TheAT89C2051providesthefollowingstandardfeatures:

5、2KbytesofFlash,128bytesofRAM,15I/Olines,two16-bittimer/counters,afivevectortwo-levelinterruptarchitecture,afullduplexserialport,aprecisionanalogcomparator,on-chiposcillatorandclockcircuitry.Inaddition,theAT89C2051isdesignedwithstaticlogicforoperationdownto

6、zerofrequencyandsupportstwosoftwareselectablepowersavingmodes-TheIdleModestopstheCPUwhileallowingtheRAM,timer/counters,serialportandinterruptsystemtocontinuefunctioning.ThePowerDownModesavestheRAMcontentsbutfreezestheoscillatordisablingallotherchipfunction

7、suntilthenexthardwarereset.1.3PinConfigurationPDIP60ICRST匚(RXD)330C(1XD)331CXTAL2匚XTAL1C(INTO)a32C(7nti)333e(TO)4CCM)"・5匚GND匚□vcc□U7□□P1.5□314□□31.2□«；ANJ)□31.0(ANO)□m1.4PinDescriptionVCCSupplyvoltage.GNDGround.Port1Port1isan8七itbidirectionalI/OportPortpin

8、sPl.2toPl.7provideinternalpullups.P1.0andPl.lrequireexternalpullups.P1.0andPIJalsoserveasthepositiveinput(AINO)andthenegativeinput(AIN1),respectively,oftheon-chipprecisionanalogcomparato匚ThePort1outputbuffers