Passive Low Frequency Interface Device With …
SEPTEMBER2009 :TMS371571FEATURESAPPLICATIONS WirelessBatterylessSensorInterfaceusing WideSupplyVoltageRange2 V UltraLowPowerConsumption MicrocontrollerandSensorcanbe APoweredThroughtheLFLink PowerDownMode60nA DataisDirectlyTransmittedOvertheLF 121FreeBytesUserMemoryLinkFromtheBaseSta tionviatheTMS37157totheMicrcontrollerand Vice LowFrequencyHalbDuplex(HDX)InterfaceVers a. HDXTransponderCommunication BatterylessConfigurationMemoryAchievingM aximumPerfomanceand MemorycanbeWrittenWithoutBatteryHighestN oiseImmunitySupport SpecialSelectiveAddressingModeAllows MicrocontrollercanReadtheContentoftheAnt iCollisionMemoryWhenIt GetsConnectedtoa Upto8 kbit/sLFUplinkDataRateBatteryandUseIt forConfiguration 126ByteEEPROM: MicrocontrollercanWritetheMemory,Whichca nbeReadOutLaterThroughthe 121BytesFreeAvailableEEPROMUserLFLinkMem ory UltraLowPowerDataLoggerMemory(Smart 32BitUniqueSerialNumberMetering) 8 BitSelectiveAddress MemoryCanBeWrittenBya HighEEPROMFlexibilityMicrocontroller PagesareIrreversibleLockableand MemoryCanBeReadThroughLFInterfaceProtect ableWithoutBatterySupport BatteryCheckandBatter
tms37157 www.ti.com swrs083a – september 2009– revised november 2009 passive low frequency interface device with eeprom and 134.2 khz transponder interface
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