集成USB 瓦斯浓度报警系统 外文翻译 外文文献 英文文献.docx

集成USB 瓦斯浓度报警系统 外文翻译 外文文献 英文文献.docx

《集成USB 瓦斯浓度报警系统 外文翻译 外文文献 英文文献.docx》由会员分享，可在线阅读，更多相关《集成USB 瓦斯浓度报警系统 外文翻译 外文文献 英文文献.docx（17页珍藏版）》请在冰豆网上搜索。

集成USB瓦斯浓度报警系统外文翻译外文文献英文文献

附录二原文

Single-ChipUSBtoUARTDataTransfer

-IntegratedUSBtransceiver;noexternalresistors；required

-Integratedclock;noexternalcrystalrequired

-Integrated1024-ByteEEPROMforvendorID，productID，serialnumber，powerdescriptor，releasenumber，andproductdescriptionstrings

-On-chippower-onresetcircuit

-On-chipvoltageregulator:

3.3Voutput

USBFunctionController

-USBSpecification2.0compliant;full-speed（12Mbps）

-USBsuspendstatessupportedviaSUSPENDpins

AsynchronousSerialDataBUS（UART）

-Allhandshakingandmodeminterfacesignals

-Dataformatssupported:

-Databits:

5，6，7，and8

-Stopbits:

1，1.5，and2

-Parity:

odd，even，mark，space，noparity

-Baudrates:

300bpsto1Mbits

-576Bytereceivebuffer;640bytetransmitbuffer

-HardwareorX-On/X-Offhandshakingsupported

-FourGPIOsignalsforstatusandcontrol

-ConfigurableI/O（1.8VtoVDD）usingVIOpin

-ConfigurableI/O（VDDto5V）usingexternalpull-up

-RS-485modewithbustransceivercontrol

VirtualCOMPortDeviceDrivers

-WorkswithExistingCOMPortPCApplications

-Royalty-FreeDistributionLicense

-WindowsVista/XP/Server2003/2000/98SE

-MacOS-X/OS-9

-Linux

USBXpress（TM）DirectDriverSupport

-Royalty-FreeDistributionLicense

-WindowsVista/XP/Server2003/2000

-WindowsCE6.0，5.0，and4.2

ExampleApplications

-UpgradeofRS-232legacydevicestoUSB

-UpgradeofRS-485legacydevicestoUSB

-CellularphoneUSBinterfacecable

-PDAUSBinterfacecable

-USBtoRS-232serialadapter

SupplyVoltage

-Self-powered:

3.0to3.6V

-USBbuspowered:

4.0to5.25V

-I/Ovoltage:

1.8VtoVdd

Package

-Leadfree28-pinQFN（5x5mm）

OrderingPartNumber

-CP2103-GM

TemperatureRange:

–40to+85°C

Section

1．SystemOverview

2．AbsoluteMaximumRatings

3．GlobalDCElectricalCharacteristics

4．PinoutandPackageDefinitions

5．USBFunctionControllerandTransceiver

6．AsynchronousSerialDataBus（UART）Interface

7．GPIOPins

8．InternalEEPROM

9．CP2103DeviceDrivers

9．3．DriverCustomization

9．1．VirtualCOMPortDrivers

9．2．USBXpressDrivers

9．4．DriverCertification

10．VoltageRegulator

11．RelevantApplicationNotes

DocumentChangeList

ContactInformation

1．SystemOverview

TheCP2103isahighly-integratedUSB-to-UARTBridgeControllerprovidingasimplesolutionforupdatingRS-232/RS-485designstoUSBusingaminimumofcomponentsandPCBspace．TheCP2103includesaUSB2．0full-speedfunctioncontroller，USBtransceiver，oscillator，EEPROM，andasynchronousserialdatabus（UART）withfullmodemcontrolsignalsinacompact5x5mmQFN-28package（sometimescalled“MLF”or“MLP”）．NootherexternalUSBcomponentsarerequired．

Theon-chipEEPROMmaybeusedtocustomizetheUSBVendorID，ProductID，ProductDescriptionString，PowerDescriptor，DeviceReleaseNumber，andDeviceSerialNumberasdesiredforOEMapplications．TheEEPROMisprogrammedon-boardviatheUSBallowingtheprogrammingsteptobeeasilyintegratedintotheproductmanufacturingandtestingprocess．

Royalty-freeVirtualCOMPort（VCP）devicedriversprovidedbySiliconLaboratoriesallowaCP2103-basedproducttoappearasaCOMporttoPCapplications．TheCP2103UARTinterfaceimplementsallRS-232/RS-485signalsincludingcontrolandhandshakingsignals，soexistingsystemfirmwaredoesnotneedtobemodified．Thedevicealsofeaturesupto（4）GPIOsignalsthatcanbeuser-definedforstatusandcontrolinformation．SupportforI/Ointerfacevoltagesdownto1.8VisprovidedviaaVIOpin．InmanyexistingRS-232designs，allthatisrequiredtoupdatethedesignfromRS-232toUSBistoreplacetheRS-232level-translatorwiththeCP2103．DirectaccessdriversupportisavailablethroughtheSiliconLaboratoriesUSBXpressdriverset．SeeforthelatestapplicationnotesandproductsupportinformationforCP2103.

AnevaluationkitfortheCP2103（PartNumber:

CP2103EK）isavailable.ItincludesaCP2103-basedUSB-to-UART/RS-232evaluationboard，acompletesetofVCPdevicedrivers，USBandRS-232cables，andfulldocumentation．ContactaSiliconLabs’salesrepresentativesorgotowww．silabs．comtoordertheCP2103EvaluationKit．

2．AbsoluteMaximumRatings

3．GlobalDCElectricalCharacteristics

4．PinoutandPackageDefinitions

5．USBFunctionControllerandTransceiver

TheUniversalSerialBusfunctioncontrollerintheCP2103isaUSB2.0compliantfull-speeddevicewithintegratedtransceiverandon-chipmatchingandpull-upresistors．TheUSBfunctioncontrollermanagesalldatatransfersbetweentheUSBandtheUARTaswellascommandrequestsgeneratedbytheUSBhostcontrollerandcommandsforcontrollingthefunctionoftheUART．

TheUSBSuspendandResumesignalsaresupportedforpowermanagementofboththeCP2103deviceaswellasexternalcircuitry．TheCP2103willenterSuspendmodewhenSuspendsignalingisdetectedonthebus．OnenteringSuspendmode，theCP2103assertstheSUSPENDandSUSPENDsignals．SUSPENDandSUSPENDarealsoassertedafteraCP2103resetuntildeviceconfigurationduringUSBEnumerationiscomplete．

TheCP2103exitstheSuspendmodewhenanyofthefollowingoccur:

（1）Resumesignalingisdetectedorgenerated，

（2）aUSBResetsignalisdetected，or（3）adeviceresetoccurs．OnexitofSuspendmode，theSUSPENDandSUSPENDsignalsarede-asserted．

BothSUSPENDandSUSPENDtemporarilyfloathighduringaCP2103reset．Ifthisbehaviorisundesirable，astrongpulldown（10k）canbeusedtoensureSUSPENDremainslowduringreset．SeeFigure6forotherrecommendedoptions．

6．AsynchronousSerialDataBus（UART）Interface

TheCP2103UARTinterfaceconsistsoftheTX（transmit）andRX（receive）datasignalsaswellastheRTS，CTS，DSR，DTR，DCD，andRIcontrolsignalsTheUARTsupportsRTS/CTS，DSR/DTR，andX-On/X-Offhandshaking．TheUARTisprogrammabletosupportavarietyofdataformatsandbaudrates．IftheVirtualCOMPortdriversareused，thedataformatandbaudratearesetduringCOMportconfigurationonthePC．IftheUSBXpressdriversareused，theCP2103isconfiguredthroughtheUSBXpressAPI．ThedataformatsandbaudratesavailablearelistedinTable8．

7．GPIOPins

TheCP2103supports4user-configurableGPIOpinsforstatusandcontrolinformation．Moreinformationregardingtheconfigurationandusageofthesepinscanbefoundin“AN144:

CP210xCustomizationGuide”and“AN223:

PortConfigurationandGPIOforCP210x”availableontheSiliconLaboratorieswebsite．

8．InternalEEPROM

TheCP2103includesaninternalEEPROMthatmaybeusedtocustomizetheUSBVendorID（VID），ProductID（PID），ProductDescriptionString，PowerDescriptor，DeviceReleaseNumberandDeviceSerialNumberasdesiredforOEMapplications．IftheEEPROMisnotprogrammedwithOEMdata，thedefaultconfigurationdatashowninTable9isused．

WhilecustomizationoftheUSBconfigurationdataisoptional，itisrecommendedtocustomizetheVID/PIDcombination．AuniqueVID/PIDcombinationwillpreventthedriverfromconflictingwithanyotherUSBdriver．AvendorIDcanbeobtainedfromwww．usb．orgorSiliconLaboratoriescanprovideafreePIDfortheOEMproductthatcanbeusedwiththeSiliconLaboratoriesVID．ItisalsorecommendedtocustomizetheserialnumberiftheOEMapplicationisoneinwhichitispossibleformultipleCP2102-baseddevicestobeconnectedtothesamePC.TheinternalEEPROMisprogrammedviatheUSB.ThisallowstheOEM'sUSBconfigurationdataandserialnumbertobewrittentotheCP2103on-boardduringthemanufacturingandtestingprocess．Astand-aloneutilityforprogrammingtheinternalEEPROMisavailablefromSiliconLaboratories．AlibraryofroutinesprovidedintheformofaWindows®DLLisalsoavailable．ThislibrarycanbeusedtointegratetheEEPROMprogrammingstepintocustomsoftwareusedbytheOEMtostreamlinetestingandserialnumbermanagementduringmanufacturing．TheEEPROMhasatypicalenduranceof100，000writecycleswithadataretentionof100years．USBdescriptorscanbelockedtopreventfuturemodification．

9CP2103DeviceDrivers

TherearetwosetsofdevicedriversavailablefortheCP2103devices:

theVirtualCOMPort（VCP）driversandtheUSBXpressDirectAccessdrivers．Onlyonesetofdriversisnecessarytointerfacewiththedevice．Thelatestdriversareavailableathttp:

//www．silabs．com/products/microcontroller/downloads．asp．

9．1VirtualCOMPortDrivers

TheCP2103VirtualCOMPort（VCP）devicedriversallowaCP2103-baseddevicetoappeartothePC'sapplicationsoftwareasaCOMport．applicationsoftwareasaCOMport．ApplicationsoftwarerunningonthePCaccessestheCP2103-baseddeviceasitwouldaccessastandardhardwareCOMport．However，actualdatatransferbetweenthePCandtheCP2103deviceisperformedovertheUSBinterface．Therefore，existingCOMportapplicationsmaybeusedtotransferdataviatheUSBtotheCP2103-baseddevicewithoutmodifyingtheapplication．SeeApplicationNoteAN197:

SerialCommunicationsGuidefortheCP210x”forExampleCodeforInterfacingtoaCP2103usingtheVirtualCOMdrivers．

9．2．USBXpressDrivers

TheSiliconLaboratoriesUSBXpressdriversprovideanalternatesolutionforinterfacingwithCP2103devices．NoSerialPortprotocolexpertiseisrequired．Instead，asimple，high-levelapplicationprograminterface（API）isusedtoprovidesimplerCP201xconnectivityandfunctionality．TheUSBXpressforCP210xDevelopmentKitincludesWindowsdevicedrivers，Windowsdevicedriverinstalleranduninstallers，andahostinterfacefunctionlibrary（hostAPI）providedintheformofaWindowsDynamicLinkLibrary（DLL）．TheUSBXpressdriversetisrecommendedfornewproductsthatalsoincludenewPCsoftware．TheUSBXpressinterfaceisdescribedinApplicationNote“AN169:

USBXpressProgrammer'sGuide．”

9．3．D