光伏发电逆变器毕业论文中英文资料外文翻译文献文档格式.docx
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光伏发电逆变器毕业论文中英文资料外文翻译文献文档格式.docx
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The‘240xfamilyoffersanarrayofmemorysizesanddifferentperipheralstailoredtomeet
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thespecificprice/performancepointsrequiredbyvariousapplications.Flash-baseddevicesofupto32Kwordsofferareprogrammablesolutionusefulfor:
uApplicationsrequiringfieldprogrammabilityupgrades.
uDevelopmentandinitialprototypingofapplicationsthatmigratetoROM-baseddevices.
FlashdevicesandcorrespondingROMdevicesarefullypin-to-pincompatible.Notethatflash-baseddevicescontaina256-wordbootROMtofacilitatein-circuitprogramming.
All‘240xdevicesofferatleastoneeventmanagermodulewhichhasbeenoptimizedfordigitalmotorcontrolandpowerconversionapplications.Capabilitiesofthismoduleincludecentered- and/oredge-aligned PWM generation, programmable deadband to preventshoot-throughfaults,andsynchronizedanalog-to-digitalconversion.Deviceswithdualeventmanagersenablemultiplemotorand/orconvertercontrolwithasingle ‗240xDSPcontroller.
Thehighperformance,10-bitanalog-to-digitalconverter(ADC)hasaminimumconversiontimeof500nsandoffersupto16channelsofanaloginput.TheautosequencingcapabilityoftheADCallowsamaximumof16conversionstotakeplaceinasingleconversionsessionwithoutanyCPUoverhead.
Aserialcommunicationsinterface(SCI)isintegratedonalldevicestoprovideasynchronouscommunicationtootherdevicesinthesystem.Forsystemsrequiringadditionalcommunicationinterfaces;
the‘2407,‘2406,and‘2404offera16-bitsynchronousserialperipheralinterface(SPI).The‘2407and‘2406offeracontrollerareanetwork(CAN)communicationsmodulethatmeets2.0Bspecifications.Tomaximizedeviceflexibility,functionalpinsarealsoconfigurableasgeneralpurposeinputs/outputs(GPIO).
Tostreamlinedevelopmenttime,JTAG-compliantscan-basedemulationhasbeenintegratedintoalldevices.Thisprovidesnon-intrusivereal-timecapabilitiesrequiredtodebugdigitalcontrolsystems.AcompletesuiteofcodegenerationtoolsfromCcompilerstotheindustry-standardCodeComposerdebuggersupportsthisfamily.Numerousthirdpartydevelopersnotonlyofferdevice-leveldevelopmenttools,butalsosystem-leveldesignanddevelopmentsupport.
PERIPHERALS
TheintegratedperipheralsoftheTMS320x240xaredescribedinthefollowingsubsections:
lTwoevent-managermodules(EVA,EVB)
lEnhancedanalog-to-digitalconverter(ADC)module
lControllerareanetwork(CAN)module
lSerialcommunicationsinterface(SCI)module
lSerialperipheralinterface(SPI)module
lPLL-basedclockmodule
lDigitalI/Oandsharedpinfunctions
lExternalmemoryinterfaces(‘LF2407only)
lWatchdog(WD)timermodule
Eventmanagermodules(EVA,EVB)
Theevent-managermodulesincludegeneral-purpose(GP)timers,full-compare/PWMunits,captureunits,andquadrature-encoderpulse(QEP)circuits.EVA‘sandEVB‘stimers,compareunits,andcaptureunitsfunctionidentically.However,timer/unitnamesdifferforEVAandEVB.Table1showsthemoduleandsignalnamesused.Table1showsthefeaturesandfunctionalityavailablefortheevent-managermodulesandhighlightsEVAnomenclature.
EventmanagersAandBhaveidenticalperipheralregistersetswithEVAstartingat7400handEVBstartingat7500h.TheparagraphsinthissectiondescribethefunctionofGPtimers,compareunits,captureunits,andQEPsusingEVAnomenclature.TheseparagraphsareapplicabletoEVBwithregardtofunction—however,module/signalnameswoulddiffer.
EVENTMANAGER
MODULES
EVA
EVB
SIGNAL
GPTimers
CompareUnits
Table1.ModuleandSignalNamesforEVAandEVB
MODULE
Timer1
T1PWM/T1CMP
Timer3
T3PWM/T3CMP
Timer2
T2PWM/T2CMP
Timer4
T4PWM/T4CMP
Compare1
PWM1/2
Compare4
PWM7/8
Compare2
PWM3/4
Compare5
PWM9/10
Compare3
PWM5/6
Compare6
PWM11/12
CaptureUnits
QEP
ExternalInputs
DirectionExternal
Clock
TDIRA
TCLKINA
Direction
ExternalClock
TDIRB
TCLKINB
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