BH66F2650/BH66F2660
Body Fat Measurment Flash MCU
General Description
Thisꢀseriesꢀofꢀdevicesꢀareꢀspecificallyꢀdesignedꢀforꢀeight-electrodeꢀACꢀBodyꢀFatꢀScaleꢀapplications.ꢀ
MeasuringꢀbodyꢀfatꢀusesꢀaꢀtechniqueꢀwherebyꢀanꢀACꢀcurrentꢀflowingꢀthroughꢀtheꢀhumanꢀbodyꢀisꢀ
measuredꢀandꢀthenꢀusedꢀtoꢀcalculateꢀaꢀbodyꢀfatꢀvalue.ꢀTheꢀspecialisedꢀcircuitsꢀtoꢀdoꢀthisꢀareꢀaꢀweightꢀ
measurementꢀcircuitꢀandꢀaꢀfatꢀmeasurementꢀcircuit.ꢀTheꢀweightꢀmeasurementꢀcircuitꢀusesꢀanꢀexternalꢀloadꢀ
cellꢀtoꢀoutputꢀaꢀsignal,ꢀwhichꢀafterꢀamplificationꢀbyꢀanꢀoperationalꢀamplifier,ꢀandꢀthenꢀconversionꢀusingꢀanꢀ
A/Dꢀconverter,ꢀreadsꢀtheꢀcorrespondingꢀvalueꢀasꢀtheꢀcalculatedꢀweight.ꢀTheꢀfatꢀmeasurementꢀcircuitꢀ
usesꢀanꢀACꢀsignalꢀviaꢀanꢀelectrodeꢀsliceꢀtoꢀflowꢀthroughꢀhumanꢀbody.ꢀAfterꢀamplificationꢀbyꢀanꢀinternalꢀ
operationalꢀamplifier,ꢀandꢀthenꢀconversionꢀbyꢀanꢀA/Dꢀconverter,ꢀtheꢀmeasuredꢀvalueꢀisꢀoneꢀrepresentingꢀ
bodyꢀimpedance,ꢀwhichꢀisꢀusedꢀtoꢀcalculateꢀtheꢀcorrespondingꢀbodyꢀfatꢀvalue.
ThisꢀseriesꢀofꢀdevicesꢀareꢀFlashꢀMemoryꢀI/Oꢀtypeꢀ8-bitꢀhighꢀperformanceꢀRISCꢀarchitectureꢀ
microcontrollerꢀwhichꢀincludesꢀaꢀmulti-channelꢀ24-bitꢀDeltaꢀSigmaꢀA/Dꢀconverter,ꢀdesignedꢀforꢀ
applicationsꢀthatꢀinterfaceꢀdirectlyꢀtoꢀanalogꢀsignalsꢀandꢀwhichꢀrequireꢀaꢀlowꢀnoiseꢀandꢀhighꢀaccuracyꢀ
analog-to-digitalꢀconverter.ꢀOfferingꢀusersꢀtheꢀconvenienceꢀofꢀFlashꢀMemoryꢀmulti-programmingꢀ
features,ꢀtheꢀdevicesꢀalsoꢀincludesꢀaꢀwideꢀrangeꢀofꢀfunctionsꢀandꢀfeatures.ꢀOtherꢀmemoryꢀincludesꢀanꢀ
areaꢀofꢀRAMꢀDataꢀMemoryꢀasꢀwellꢀasꢀanꢀareaꢀofꢀtrueꢀEEPROMꢀmemoryꢀforꢀstorageꢀofꢀnon-volatileꢀ
dataꢀsuchꢀasꢀserialꢀnumbers,ꢀcalibrationꢀdataꢀetc.
Analogꢀfeaturesꢀincludeꢀaꢀmulti-channelꢀ24-bitꢀDeltaꢀSigmaꢀA/Dꢀconverter,ꢀPGAꢀandꢀLDOꢀandꢀotherꢀ
circuitryꢀspecificallyꢀdesignedꢀforꢀBodyꢀFatꢀScaleꢀapplications.ꢀMultipleꢀandꢀextremelyꢀflexibleꢀ
TimerꢀModulesꢀprovideꢀtiming,ꢀpulseꢀgenerationꢀandꢀPWMꢀgenerationꢀfunctions.ꢀCommunicationꢀ
withꢀtheꢀoutsideꢀworldꢀisꢀprovidedꢀbyꢀincludingꢀfullyꢀintegratedꢀSPI,ꢀI2CꢀandꢀUARTꢀinterfaceꢀ
functions,ꢀpopularꢀinterfacesꢀwhichꢀprovideꢀdesignersꢀwithꢀaꢀmeansꢀofꢀeasyꢀcommunicationꢀwithꢀ
externalꢀperipheralꢀhardware.ꢀProtectiveꢀfeaturesꢀsuchꢀasꢀanꢀinternalꢀWatchdogꢀTimer,ꢀLowꢀVoltageꢀ
ResetꢀandꢀLowꢀVoltageꢀDetectorꢀcoupledꢀwithꢀexcellentꢀnoiseꢀimmunityꢀandꢀESDꢀprotectionꢀensureꢀ
thatꢀreliableꢀoperationꢀisꢀmaintainedꢀinꢀhostileꢀelectricalꢀenvironments.ꢀ
Aꢀfullꢀchoiceꢀofꢀexternal,ꢀinternalꢀandꢀhighꢀandꢀlowꢀoscillatorsꢀfunctionsꢀareꢀprovidedꢀincludingꢀtwoꢀ
fullyꢀintegratedꢀsystemꢀoscillatorsꢀwhichꢀrequireꢀnoꢀexternalꢀcomponentsꢀforꢀtheirꢀimplementation.ꢀ
Theꢀabilityꢀtoꢀoperateꢀandꢀswitchꢀdynamicallyꢀbetweenꢀaꢀrangeꢀofꢀoperatingꢀmodesꢀusingꢀdifferentꢀ
clockꢀsourcesꢀgivesꢀusersꢀtheꢀabilityꢀtoꢀoptimiseꢀmicrocontrollerꢀoperationꢀandꢀminimiseꢀpowerꢀ
consumption.
Theꢀdevicesꢀalsoꢀincludeꢀaꢀmultiplication/divisionꢀunit.ꢀTheꢀinclusionꢀofꢀflexibleꢀI/Oꢀprogrammingꢀ
features,ꢀTime-Baseꢀfunctionsꢀalongꢀwithꢀmanyꢀotherꢀfeaturesꢀensureꢀthatꢀonlyꢀaꢀminimumꢀofꢀ
externalꢀcomponentsꢀisꢀrequiredꢀforꢀapplicationꢀimplementation,ꢀresultingꢀinꢀreducedꢀcomponentꢀ
costsꢀandꢀreductionsꢀinꢀcircuitꢀboardꢀareas.
Rev. 1.10
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�anꢀaꢁꢂ 0ꢃꢄ ꢅ01ꢆ
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
