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STSTM32L053R8气体和液体传感器解决方案时间:2017-10-1912:05:08
作者:ST
来源:中电网ST公司的\o"stm"stm32L053x6/8是基于Arm®Cortex®-M0+核超低功耗的32位MCU,具有高达64KB闪存,8KBSRAM,2KBEEPROM和存储器保护单元(MPU),工作频率从32kHz到32MHz,0.95DMIPS/MHz,工作电压1.65V-3.6V,工作温度-40到125℃,待机模式功耗0.27μA,主要用在气体/水表和工业传感器,健康和健身设备,遥控和用户接口,PC外设,游戏和GPS设备,告警系统,有线和无线传感器与视频互连.本文介绍了STM32L053x6/8主要特性,功能框图和时钟树,评估板P-NUCLEO-IKA02A1主要特性,电路图和材料清单.
Theultra-low-powerSTM32L053x6/8areofferedin3differentpackagetypes:from48pinsto64pins.Dependingonthedevicechosen,differentsetsofperipheralsareincluded,thedescriptionbelowgivesanoverviewofthecompleterangeofperipheralsproposedinthisfamily.Thesefeaturesmaketheultra-low-powerSTM32L053x6/8microcontrollerssuitableforawiderangeofapplications:
•Gas/watermetersandindustrialsensors
•Healthcareandfitnessequipment
•Remotecontrolanduserinterface
•PCperipherals,gaming,GPSequipment
•Alarmsystem,wiredandwirelesssensors,videointercom
Theultra-low-powerSTM32L053x6/8microcontrollersincorporatetheconnectivitypoweroftheuniversalserialbus(USB2.0crystal-less)withthehigh-performanceArm®Cortex®-M0+32-bitRISCcoreoperatingata32MHz
frequency,amemoryprotectionunit(MPU),high-speedembeddedmemories(upto64KbytesofFlashprogrammemory,2KbytesofdataEEPROMand8KbytesofRAM)plusanextensiverangeofenhancedI/Osandperipherals.TheSTM32L053x6/8devicesprovidehighpowerefficiencyforawiderangeofperformance.Itisachievedwithalargechoiceofinternalandexternalclocksources,aninternalvoltageadaptationandseverallow-powermodes.
TheSTM32L053x6/8devicesofferseveralanalogfeatures,one12-bitADCwithhardwareoversampling,oneDAC,twoultra-low-powercomparators,severaltimers,onelow-powertimer(LPTIM),threegeneral-purpose16-bittimersandonebasictimer,oneRTCandoneSysTickwhichcanbeusedastimebases.Theyalsofeaturetwowatchdogs,onewatchdogwithindependentclockandwindowcapabilityandonewindowwatchdogbasedonbusclock.Moreover,theSTM32L053x6/8devicesembedstandardandadvancedcommunicationinterfaces:uptotwoI2C,twoSPIs,oneI2S,twoUSARTs,alow-powerUART(LPUART),andacrystal-lessUSB.Thedevicesofferupto24capacitivesensingchannelstosimplyaddtouchsensingfunctionalitytoanyapplication.TheSTM32L053x6/8alsoincludeareal-timeclockandasetofbackupregistersthatremainpoweredinStandbymode.Finally,theirintegratedLCDcontrollerhasabuilt-inLCDvoltagegeneratorthatallowstodriveupto8multiplexedLCDswithcontrastindependentofthesupplyvoltage.Theultra-low-powerSTM32L053x6/8devicesoperatefroma1.8to3.6Vpowersupply(downto1.65Vatpowerdown)withBORandfroma1.65to3.6VpowersupplywithoutBORoption.Theyareavailableinthe-40to+125℃temperaturerange.Acomprehensivesetofpower-savingmodesallowsthedesignoflow-powerapplications.
STM32L053R8主要特性:
•Ultra-low-powerplatform
–1.65Vto3.6Vpowersupply
–-40to125℃temperaturerange
–0.27μAStandbymode(2wakeuppins)
–0.4μAStopmode(16wakeuplines)
–0.8μAStopmode+RTC+8KBRAMretention
–88μA/MHzinRunmode–3.5μswakeuptime(fromRAM)
–5μswakeuptime(fromFlashmemory)
•Core:Arm®32-bitCortex®-M0+withMPU
–From32kHzupto32MHzmax.
–0.95DMIPS/MHz
•Memories
–Upto64KBFlashmemorywithECC
–8KBRAM
–2KBofdataEEPROMwithECC
–20-bytebackupregister
–SectorprotectionagainstR/Woperation
•Upto51fastI/Os(45I/Os5Vtolerant)
•Resetandsupplymanagement
–Ultra-safe,low-powerBOR(brownoutreset)with5selectablethresholds
–Ultra-low-powerPOR/PDR
–Programmablevoltagedetector(PVD)
•Clocksources
–1to25MHzcrystaloscillator
–32kHzoscillatorforRTCwithcalibration
–Highspeedinternal16MHzfactory-trimmedRC(+/-1%)
–Internallow-power37kHzRC
–Internalmultispeedlow-power65kHzto4.2MHzRC
–PLLforCPUclock
•Pre-programmedbootloader
–USART,SPIsupported
•Developmentsupport
–Serialwiredebugsupported
•LCDdriverforupto8×28segments
–Supportcontrastadjustment
–Supportblinkingmode
–Step-upconvertedonboard
•RichAnalogperipherals
–12-bitADC1.14Mspsupto16channels(downto1.65V)
–12-bit1channelDACwithoutputbuffers(downto1.8V)
–2xultra-low-powercomparators(windowmodeandwakeupcapability,downto1.65V)
•Upto24capacitivesensingchannelssupportingtouchkey,linearandrotarytouchsensors
•7-channelDMAcontroller,supportingADC,SPI,I2C,USART,DAC,Timers
•8xperipheralcommunicationinterfaces
–1xUSB2.0crystal-less,batterychargingdetectionandLPM
–2xUSART(ISO7816,IrDA),1xUART(lowpower)
–Upto4xSPI16Mbits/s
–2xI2C(SMBus/PMBus)
•9xtimers:1x16-bitwithupto4channels,2x16-bitwithupto2channels,1x16-bitultra-low-powertimer,1xSysTick,1xRTC,1x16-bitbasicforDAC,and2xwatchdogs(independent/window)
•CRCcalculationunit,96-bituniqueID
•TrueRNGandfirewallprotection
•AllpackagesareECOPACK®2
图1.STM32L053x6/8框图
图2.STM32L053x6/8时钟树
评估板P-NUCLEO-IKA02A1
TheP-NUCLEO-IKA02A1evaluationpackprovidesareferencedesignforvariouselectrochemicalsensors.
TheSTM32NucleogasexpansionboardinterfaceselectrochemicalsensorswiththeMCUontheSTM32Nucleodevelopmentboard.TwoTSU111operationalamplifiersprovidesignalconditioning;theyareidealforelectrochemicalsensingthankstotheirhighprecisionandlowpowerconsumption.Theexpansionboardincludesanultra-lowcurrentprecisionanalogtemperaturesensorSTLM20usedforcompensationofgasreadings.
STM32NucleoboardsprovideanaffordableandflexiblewayforuserstoexperimentwithnewideasandbuildprototypeswithanySTM32microcontrollerline.TheNUCLEO-L053R8isdesignedforlowpowerapplications.
Thedesignandcomponentryareoptimisedforbatteryoperationandmaximumbatterylifetime.
图3.评估板P-NUCLEO-IKA02A1外形图
TheP-NUCLEO-IKA02A1evaluationpacktargetsasegmentofCOdetectorsforhomealarmsystems.ItisdesignedtobeeasilycustomizedandmeetsEN50291requirements.
评估板P-NUCLEO-IKA02A1主要特性:
STM32Nucleogasexpansionboard
compatiblewithmostelectrochemicalsensors
fourdifferentfootprintsforsensors(PCD13,5,PCD17,MiniandTGS5141)
two-,three-andfour-electrodesensors
signalconditioningwithTSU111
STLM20temperaturesensor
changeablegain
NUCLEO-L053R8
Ultra-low-powerARM®Cortex®-M0+MCU(32MHzmax.)with64KbytesFlashand8KbytesofSRAM
Carbonmonoxidesensor
FigaroTGS5141
coin-cellsensor
expectedlifetime>10yrs
canpass5000ppmEN50291
Lowpowerdesignforlongbatte
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