ST STMLR气体和液体传感器解决方案

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