CP2103中文资料

PreliminaryRev.0.29/05Copyright©2005bySiliconLaboratoriesCP2103Thisinformationappliestoaproductunderdevelopment.Itscharacteristicsandspecificationsaresubjecttochangewithoutnotice.CP2103SINGLE-CHIPUSBTOUARTBRIDGESingle-ChipUSBtoUARTDataTransferIntegratedUSBtransceiver;noexternalresistorsrequiredIntegratedclock;noexternalcrystalrequiredIntegrated1024-ByteEEPROMforvendorID,productID,serialnumber,powerdescriptor,releasenumber,andproductdescriptionstringsOn-chippower-onresetcircuitOn-chipvoltageregulator:3.3VoutputUSBFunctionControllerUSBSpecification2.0compliant;full-speed(12Mbps)USBsuspendstatessupportedviaSUSPENDpinsAsynchronousSerialDataBUS(UART)AllhandshakingandmodeminterfacesignalsDataformatssupported:-Databits:5,6,7,and8-Stopbits:1,1.5,and2-Parity:odd,even,mark,space,noparityBaudrates:300bpsto1Mbits576Bytereceivebuffer;640bytetransmitbufferHardwareorX-On/X-OffhandshakingsupportedFourGPIOsignalsforstatusandcontrolConfigurableI/O(1.8VtoVDD)usingVIOpinConfigurableI/O(VDDto5V)usingexternalpull-upRS-485modewithbustransceivercontrolVirtualCOMPortDeviceDriversWorkswithexistingCOMPortPCapplicationsRoyalty-freedistributionlicenseWindows®98SE/2000/XPMACOS-9MACOS-XLinux2.40USBXpress™DirectDriverSupportExampleApplicationsUpgradeofRS-232legacydevicestoUSBUpgradeofRS-485legacydevicestoUSBCellularphoneUSBinterfacecablePDAUSBinterfacecableUSBtoRS-232serialadapterSupplyVoltageSelf-powered:3.0to3.6VUSBbuspowered:4.0to5.25VI/Ovoltage:1.8VtoVDDPackageLeadfree28-pinQFN(5x5mm)OrderingPartNumberCP2103-GMTemperatureRange:–40to+85°CFigure1.ExampleSystemDiagramCP21033.3VVoltageRegulator48MHzOscillatorINOUTSUSPENDSUSPEND1112REGIN7GND2RST9D+D-48UARTRIDCDCTSRTSRXDTXDDSRDTR128272625242322233ExternalRS-232transceiverorUARTcircuitry(toexternalcircuitryforUSBsuspendstates)VBUSD-D+GND456USBCONNECTOR61VDDVBUSUSBFunctionControllerUSBTransceiver640BTXBuffer576BRXBuffer1024BEEPROMGPIO_0GPIO_1GPIO_3GPIO_2181716(toexternalcircuitryforstatusandcontrol)4VIO5ExternalvoltagesupplyordirectconnectiontoVDD19CP21032PreliminaryRev.0.2CP2103PreliminaryRev.0.23TABLEOFCONTENTSSectionPage1.SystemOverview.........................................................42.AbsoluteMaximumRatings................................................53.GlobalDCElectricalCharacteristics.........................................54.PinoutandPackageDefinitions.............................................75.USBFunctionControllerandTransceiver....................................126.AsynchronousSerialDataBus(UART)Interface..............................137.GPIOPins..............................................................138.InternalEEPROM........................................................139.VirtualComPortDeviceDrivers............................................1410.USBXpress™DirectDriverSupport........................................1411.VoltageRegulator.......................................................14ContactInformation........................................................18CP21034PreliminaryRev.0.21.SystemOverviewTheCP2103isahighly-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-485signals,includingcontrolandhandshakingsignals,soexistingsystemfirmwaredoesnotneedtobemodified.Thedevicealsofeaturesupto(4)GPIOsignalsthatcanbeuser-definedforstatusandcontrolinformation.SupportforI/Ointerfacevoltagesdownto1.8VisprovidedviaaVIOpin.InmanyexistingRS-232designs,allthatisrequiredtoupdatethedesignfromRS-232toUSBistoreplacetheRS-232level-translatorwiththeCP2103.See(PartNumber:CP2103EK)isavailable.ItincludesaCP2103-basedUSB-to-UART/RS-232evaluationboard,acompletesetofVCPdevicedrivers,USBandRS-232cables,andfulldocumentation.ContactaSiliconLabs’salesrepresentativesorgoto–55—125°CStorageTemperature–65—150°CVoltageonanyI/OPinorRSTwithrespecttoGND–0.3—5.8VVoltageonVDDorVIOwithrespecttoGND–0.3—4.2VMaximumTotalcurrentthroughVDD,VIO,andGND——500mAMaximumoutputcurrentsunkbyRST