Description BTAudioModuleUserGuide Class1BluetoothAudioModule TheBTAUDIO5112Class1BluetoothHiPowerAudioModuleisahighlytunedandcompletelyintegratedwirelessaudio transceiversubsystemreadyforinstallationinaudiodevices.TheBTAUDIO5112isapreengineeredsubsystemintegratinga wirelessradio,digitalaudiosystem,andprogrammedfirmwareprofilesthatdefinefeatures,configurations,anduserinterface.All firmwareofferedbyKCWirefreecanbecustomizedforOEMclients.Inmanycasesafewchangescanproducegreatvalueby differentiatingandimprovingyourproduct.FirmwarecanbeupdatedviaUSB. kcAudioGatewayFirmwareEdition ThekcAudioGatewayfirmwareisatransmittersystem,offeringA2DPsourceprofileorAGHFPgatewayprofile(default),butnot bothsimultaneously.A2DPmodeprovidesstereotransmissiontoHeadset/Speakerdevices.Stereoaudioissampledfromthe MIC_L+,MIC_L,MIC_R+,andMIC_Rpinsat44.1kHz,andwillautomaticallytransmittoaHeadsetdevice.AGHFPmode(default) providestwowayvoicecommunications,sampledat8kHz,toastandardBluetoothcellphoneheadset.Additionally,theHeadset VoiceCommandpromptwilltoggleaPTTpinonkcAudioGateway,whichenablesstandardBluetoothcellphoneheadsetsto provideaPTTfunction. PleaserefertoourkcAudioGatewayUserGuidefordetails. kcAudioHeadsetFirmwareEdition ThekcAudioHeadsetfirmwareisareceiversystem,offeringA2DPsinkprofile,andHFPprofile.ItcanreceiveanA2DPwireless stereosignal,decompress,andconverttoanalogaudioavailableontheSPK_L+,SPK_L,SPK_R+,andSPK_Rpins.Additionally,it cananswerphonecalls,whichwillpauseanyA2DPstream,andswitchmodes,nowprovidingtwowaymonocommunication channel. PleaserefertoourkcAudioHeadsetUserGuidefordetails. www.kcwirefree.com VersionDecember19,2014 Page1 Dimensions & Layout BTAudioModuleUserGuide Class1BluetoothAudioModule BTAUDIO5112 TopView 15.0 MM 6.1 2.8 6.1 1.8 21.0 1.8 24.6 PADS 1.0 X 2.0 1.4 2.6 9.8 2.6 D N G T N A D N G 3 4 2 4 1 4 8 1 9 1 0 2 1 2 2 2 3 2 4 2 PIO2 PIO3 PIO4 PIO5 PIO6 PIO7 PIO8 PIO9 PIO10 LED_BLU LED_RED UART_RTS UART_CTS UART_TXD UART_RXD 3V3_OUT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 7 1 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 SPK_R+
SPK_R-
SPK_L+
SPK_L-
MIC_R+
MIC_R-
MIC_L+
MIC_L-
MIC_BIAS PCM_IN PCM_CLK PCM_OUT PCM_SYNC USB+
USB-
CHARGE D N G D D V T E S E R E L B A N E B S C _ I P S I S O M _ I P S O S I M _ I P S K L C _ I P S www.kcwirefree.com VersionDecember19,2014 Page2 PinAssignments BTAudioModuleUserGuide Class1BluetoothAudioModule Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 Function PIO2 PIO3 PIO4 PIO5 PIO6 PIO7 PIO8 PIO9 PIO10 LED_BLU LED_RED UART_RTS UART_CTS UART_TXD UART_RXD 3V3_OUT GND RESET VDD ENABLE SPI_CSB SPI_MOSI SPI_MISO SPI_CLK CHARGE USB USB+
PCM_SYNC PCM_OUT PCM_CLK PCM_IN MIC_BIAS MIC_L MIC_L+
MIC_R MIC_R+
SPK_L SPK_L+
SPK_R SPK_R+
GND ANT GND
[Optionfeaturesinbrackets]
Description ProgrammableI/O ProgrammableI/O ProgrammableI/O ProgrammableI/O ProgrammableI/O[I2C]
ProgrammableI/O[I2C]
ProgrammableI/O[I2C]
ProgrammableI/O ProgrammableI/O BlueLEDDrain RedLEDDrain UARTRequestToSend UARTClearToSend UARTDataTransmit UARTDataReceive Onboard3.3VRegulatorOutput Ground Reset(ActiveLow>5ms) VDD/BatteryInput(2.9V4.4V) SystemEnable(withinternallatch) SPIChipSelect SPIMasterOut SPIMasterIn SPIClock BatteryChargingSupply(onlyusewhenVDDisbatterypowered) USBDataNegative USBDataPositive PCMSync[I2SWS]
PCMOut[I2SOut][SPDIFOut]
PCMClock[I2SClk]
PCMIn[I2SIn][SPDIFIn]
MicrophoneBias AudioInputLeftNegative AudioInputLeftPositive AudioInputRightNegative AudioInputRightPositive AudioOutputLeftNegative AudioOutputLeftPositive AudioOutputRightNegative AudioOutputRightNegative Ground 50Ohm2.4GHzAntennaPort Ground Type I/O I/O I/O I/O I/O I/O I/O I/O I/O Input Input Output Input Output Input Output Input Input Input Input Input Output Input Input I/O I/O I/O Output I/O Input Output Input Input Input Input Output Output Output Output I/O www.kcwirefree.com VersionDecember19,2014 Page3 InterfacePins PIOPins[19]
BTAudioModuleUserGuide Class1BluetoothAudioModule PIOpinsareLOWbydefault,andbuttonpressesusedfordeviceoperationareHIGHsignals.PIOinputsaredebouncedto20ms. SeveralPIOpinsareassignedfunctionsindefaultversionsoffirmware.Customprogrammedfunctionsareavailable.Inputscan beconfiguredforweakpullup,weakpulldown,strongpullup,strongpulldown.Voltageinputtoleranceandoutputlevelis directlyrelatedtotheVDDlevel. SpecificfunctionsareenabledondesignatedPIOpinsdependingonfirmwareversion.PleaserefertothespecificfirmwareAudio UserGuidesforcompleteinformationregardingPIOfeaturesandassignments. LEDPins[1011]
TwoopendrainLEDoutputpinsareavailable.TheLED'sneedapositive3.3V(maximum)supply,andacurrentlimitingresistor. UARTPins[1215]
TheUARTiscompatiblewiththe16450industrystandard.UpcomingkcAudiofirmwarewillimplementanATCommandsetfor configurationandoperation. 3V3_OUTPin[16]
Themodulehasseveralonboardregulators.Theonboard3V3regulatorsuppliesthePIO,PCM,SPI,UART,andUSBPins.Theclass 2modulehasupto100mAavailablefromthispin.Theclass1modulealsousestheonboard3V3regulatortosupplytheRF PowerAmp,andhaslessthan30mAavailablefromthispin. GNDPin[17]
VSSgroundplane. RESETPin[18]
ThemodulewillresetwhenpulledLOW>5ms. VDDPin[19]
MinimumVDDis2.9V. Suppliesseveralonboardregulators,andisalsothedesignatedBatteryPterminalifpoweringdirectlyfromaLithiumIonbattery. TheVDDpinmayreceivearechargecurrentsupplywhenthevoltagereadingfromthispinmeasuresbelow4.0V,theCHARGEPin isconnectedtoapowersupply,andfirmwarehasenabledbatterymonitoringandcharging(defaultbehavior).ThisVDDpin suppliestheonboardSeikoS1112LDO3V3regulator.Note:theSeikoS1112hasa200mVdropout,soifVDDis<3.5V,thenthe 3V3supplyrailwillhavea0.2Vdropout.The3V3railsuppliesPIO,PCM,SPI,UART,andUSBPins.Powersupplytomoduleshould havelessthan10mVrmsnoisebetween010MHz,andspikesshouldbeminimal. www.kcwirefree.com VersionDecember19,2014 Page4 ENABLEPin[20]
BTAudioModuleUserGuide Class1BluetoothAudioModule Enablesinternalvoltageregulators.TheENABLEpincanbeutilizedintwodifferentways.Ourcurrentdefaultfirmwareusesthe ENABLEpininSwitchPowerMode,whereitshouldbetiedtotheVDDpin,andusedwithanexternalpowerswitch.InSwitched PowerMode,ourBTBfunctionsaretypicallyassignedtoPIO4.PleaseseespecificfirmwareUserGuidesfordetailsregardingPIO functionassignments. Alternatively,firmwarecanutilizetheENABLEpininBatteryPowerMode,whichusesamomentaryON/OFFbuttontopowerup. Oncepoweredup,theinternalvoltageregulatorswilllatchon,andthentheENABLEpinisusedforBTBassignedfunctions.Thisis typicallyintendedforabatterypoweredheadsetapplicationwithminimalbuttons.Separatefirmwaremustbeusedthatassigns thisbehaviortotheENABLEpin. SPIPins[2124]
WehighlyrecommendincludingtestpointsforthefourSPIsignals,usedforfirmwareloadinganddiagnostics.TheSPIinterfaceis unavailableforgeneralusage,andonlyinterfaceswithchipmanufacturerdiagnosticapplications. CHARGEPin[25]
Providepowersupplyforbatterycharging,whenabatteryisconnectedtoVDD,andfirmwareenablesbatterymonitoringand chargingfunction(enabledbydefault).DonotconnectwithoutaLithiumIonbatteryconnectedtoVDDPin. USBPins[2627]
Theseinterfacesareavailablewithcustomconfiguration.USBcanbeprogrammedforplugnplayoperationusingstandardUSB AudiodriversavailableonPC,Mac,andLinux. PCMPins[2831]
Pinsaregenerally3.3Vlevellogic(dependentuponVDD). MIC_BIASPin[32]
ProvidesaDCbiasintendedforelectretmicrophones.Configurable1.8V3.3V(default=2.69V)withacurrentof200uA 1.229mA(default=0.672mA). MICPins[3336]
Microphoneorlinelevelanalogaudioinput.Impedanceis6.0k30kdependingonvolumesetting.ADCoperatesat8,11.025, 16,22.05,32,and44.1kHz.Inputsignalshouldbe4mVrms800mVrms.Inputgainisadjustablefrom SPKPins[3740]
Outputgainisadjustablefrom45dBto+3.5dB. RFPort[4143]
Themodulealreadycontainsabalunfilteronboard,sotheantennaportonlyrequiresastandard2.4GHzRFtransmissionline witha50ohmload.Designtheantennacircuitaccordingtotheantennamanufacturerguidelines.Somedesignsmayuseasimple chipantennawithoutadditionalcircuitry.Microstripdesignisnotcriticaliftheantennaislessthan3mmfromtheRFpin.Afew recommendedchipantennas:Johanson2450AT18B100E,Johanson2450AT43A100E,orAntenovaRufaA5839.ForPCB transmissionlinedesign,werecommendthefollowingonlinecalculator:http://www.emclabinfo.com/emc_calc/microstrip.htm www.kcwirefree.com VersionDecember19,2014 Page5 ElectricalCharacteristics
(ConditionsVDD=3.3Vand25C) BTAudioModuleUserGuide Class1BluetoothAudioModule AbsoluteMaximumRatings Storagetemperaturerange SupplyvoltageVDD SupplyvoltageCHARGE SupplyvoltageENABLE RecommendedOperatingConditions Temperaturerange SupplyvoltageVDD SupplyvoltageCHARGE SupplyvoltageENABLE CurrentConsumption Stereo MonoHeadset NoConnection Peakcurrent RFCharacteristics CarrierFrequency TransmissionLine TransmissionPower ReceiveSensitivity AudioDACCharacteristics Outputvoltagefullscaleswing(differential) Resolution SampleRate SNR(@8KHzsampling) DigitalGain AnalogGain THD+N(@100kload) Min 40 0.4 4.5 0.4 Typical 20 3.3 6.5 4.4 Min 2400 50 0 20 Typical 750 95 0.04 Max
+105 4.4 6.5 4.9 Max
+85 4.4 Avg 66 36 2 190 Max 2483.5 50
+20 98 Max 16 48 21.5 21 0.01 Unit C Volts Volts Volts Unit C Volts Volts Volts Unit mA mA mA mA Unit MHz dBm dBm Unit mVrms Bits kHz dB dB dB
%
Min 40 2.9 4.5 2.5 Min 8 24 0 www.kcwirefree.com VersionDecember19,2014 Page6 BTAudioModuleUserGuide Class1BluetoothAudioModule Min 8 24 Typical 0.004 0.800 79 20 6.0 0.04 Max 16 44.1 21.5 42 30 Min 0.3 VDDLDOx0.625 0 VDDLDOx0.75 100 VDDLDOx0.25 1.0 500K 500K 10K 10K Typical Max 4.0 4.0 0 VDDLDOx0.25 VDDLDO+0.3 0.125 VDDLDO 100 VDDLDOx0.625 5.0 2M 2M 50K 50K Unit Vrms Vrms Bits kHz dB dB dB kHz
%
Unit Volts Volts Volts Volts mA mA nA Volts pF AudioADCCharacteristics Inputfullscaleatmaximumgain(differential) Inputfullscaleatminimumgain(differential) Resolution SampleRate(8,11.025,16,22.050,32,44.1kHz) SNR(@8KHzsampling) DigitalGain AnalogGain 3dBbandwidth Inputimpedance THD+N(microphoneinput)@30mVrmsinput ProgrammableI/OPinsOperatingCharacteristics InputVoltageLowLogic InputVoltageHighLogic OutputVoltageLowLogic OutputVoltageHighLogic OutputCurrentLowLogic OutputCurrentHighLogic InputLeakageCurrent InputSchmittvoltage InputCapacitance Weakpullup Weakpulldown Strongpullup Strongpulldown www.kcwirefree.com VersionDecember19,2014 Page7 FCC Statement:
This equipment has been tested and found to comply with the limits for Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
television Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment to an outlet on a circuit different from that to which the connected. receiver is This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Note: Modifications to this product will void the users authority to operate this equipment. RF Radiation Exposure Statement:
1.This Transmitter must not be co located or operating in conjunction with any other antenna or transmitter. 2.This equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20 centimeters between the radiator and your body. FCC Information to OEM integrator The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the user manual of the end product. The user manual which is provided by OEM integrators for end users must include the following information in a prominent location. 1.To comply with FCC RF exposure compliance requirements, the antenna used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co located or operating in conjunction with any other antenna or transmitter, except in accordance with FCC multi transmitter product procedures. 2. Only those antennas with same type and lesser gain filed under this FCC ID number can be used with this device. 3. The regulatory label on the final system must include the statement: Contains FCC ID:S22-BTAUDIO or using electronic labeling method as documented in KDB 784748. 4. The final system integrator must ensure there is no instruction provided in the user manual or customer documentation indicating how to install or remove the transmitter module except such device has implemented two ways authentication between module and the host system