基于STM8L15xxx设计的超低功耗8位MCU开发方案.docx

基于STM8L15xxx设计的超低功耗8位MCU开发方案.docx

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基于STM8L15xxx设计的超低功耗8位MCU开发方案

基于STM8L15xxx设计的超低功耗8位MCU开发方案

2010年05月17日11:

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STM8L15xxx

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基于STM8L15xxx设计的超低功耗8位MCU开发方案

ST公司的STM8L15xxx是超低功耗8位MCU系列,采用先进的STM8内核,动态功耗为192μA/MHZ,16MHzCPU时钟的性能高达16MIPS,工作电压从1.8V到3.6V（低至1.65V）,多达32KB嵌入闪存程序存储器,主要用在医疗和手提设备,PC外设,游戏机,GPS,告警系统,有线和无线传感器.本文介绍了STM8L15xxx主要特性,方框图,时钟树框图和超低功耗STM8L15LPBOARD演示板主要特性,详细电路图.

TheSTM8L15xxxdevicesaremembersoftheSTM8LUltralowpower8-bitfamily.Theyarereferredtoasmedium-densitydevicesintheSTM8L15xxxreferencemanual（RM0031）andintheSTM8LFlashprogrammingmanual（PM0054）.Theyprovidethefollowingbenefits:

●Integratedsystem

–Upto32Kbytesofmedium-densityembeddedFlashprogrammemory

–1KbyteofdataEEPROM

–Internalhighspeedandlow-powerlowspeedRC.

–Embeddedreset

●Ultralowpowerconsumption

–192μA/MHZ（dynamicconsumption）

–1μAinActive-haltmode

–Clockgatedsystemandoptimizedpowermanagement

–CapabilitytoexecutefromRAMforLowpowerwaitmodeandLowpowerrunmode

●Advancedfeatures

–Upto16MIPSat16MHzCPUclockfrequency

–Directmemoryaccess（DMA）formemory-to-memoryorperipheral-to-memoryaccess.

●Shortdevelopmentcycles

–Applicationscalabilityacrossacommonfamilyproductarchitecturewithcompatiblepinout,memorymapandmodularperipherals.

–Widechoiceofdevelopmenttools

TheSTM8L15xxxfamilyoperatesfrom1.8Vto3.6V（downto1.65Vatpowerdown）andisavailableinthe-40to+85℃and-40to+125℃temperatureranges.

TheSTM8L15xxxUltralowpowerfamilyfeaturestheenhancedSTM8CPUcoreprovidingincreasedprocessingpower（upto16MIPSat16MHz）whilemaintainingtheadvantagesofaCISCarchitecturewithimprovedcodedensity,a24-bitlinearaddressingspaceandanoptimizedarchitectureforlowpoweroperations.

Thefamilyincludesanintegrateddebugmodulewithahardwareinterface（SWIM）whichallowsnon-intrusiveIn-ApplicationdebuggingandultrafastFlashprogramming.AllSTM8L15xxxmicrocontrollersfeatureembeddeddataEEPROMandlowpowerlowvoltagesingle-supplyprogramFlashmemory.

TheSTM8L15xxxfamily8-bitmicrocontrollersincorporateanextensiverangeofenhancedI/Osandperipherals.Alldevicesoffer12-bitADC,DAC,twocomparators,Real-timeclockthree16-bittimers,one8-bittimeraswellasstandardcommunicationinterfacesuchasSPI,I2CandUSART.A4x28-segmentLCDisavailableontheSTM8L152xxline.

ThemodulardesignoftheperipheralsetallowsthesameperipheralstobefoundindifferentSTmicrocontrollerfamiliesincluding32-bitfamilies.Thismakesanytransitiontoadifferentfamilyveryeasy,andsimplifiedevenmorebytheuseofacommonsetofdevelopmenttools.

ThesefeaturesmaketheSTM8L15xxxmicrocontrollerfamilysuitableforawiderangeofapplications:

●Medicalandhandheldequipment

●Applicationcontrolanduserinterface

●PCperipherals,gaming,GPSandsportequipment

●Alarmsystems,wiredandwirelesssensors

STM8L15xxx主要特性:

■Operatingconditions

–Operatingpowersupplyrange1.8Vto3.6V（downto1.65Vatpowerdown）

–Temperaturerange:

-40℃to85or125℃

■Lowpowerfeatures

–5lowpowermodes:

Wait,Lowpowerrun（5.1μA）,Lowpowerwait（3μA）,Active-haltwithfullRTC（1.3μA）,Halt（350nA）

–Dynamicconsumption:

195μA/MHz+440μA

–UltralowleakageperI/0:

50nA

–FastwakeupfromHalt:

4.7μs

■AdvancedSTM8core

–Harvardarchitectureand3-stagepipeline

–Maxfreq.16MHz,16CISCMIPSpeak

–Upto40externalinterruptsources

■Resetandsupplymanagement

–Lowpower,ultrasafeBORresetwith5selectablethresholds

–UltralowpowerPOR/PDR

–Programmablevoltagedetector（PVD）

■Clockmanagement

–1to16MHzcrystaloscillator

–32kHzcrystaloscillator

–Internal16MHzfactory-trimmedRC

–Internal38kHzlowconsumptionRC

–Clocksecuritysystem

■LowpowerRTC

–BCDcalendarwithalarminterrupt

–Auto-wakeupfromHaltw/periodicinterrupt

■LCD:

upto4x28segmentsw/step-upconverter

■Memories

–Upto32KBofFlashprogrammemoryand1KbyteofdataEEPROMwithECC,RWW

–Flexiblewriteandreadprotectionmodes

–Upto2KbytesofRAM

■DMA

–4channels;supportedperipherals:

ADC,DAC,SPI,I2C,USART,timers

–1channelformemory-to-memory

■12-bitDACwithoutputbuffer

■12-bitADCupto1Msps/25channels

–T.sensorandinternalreferencevoltage

■2Ultralowpowercomparators

–1withfixedthresholdand1railtorail

–Wakeupcapability

■Timers

–Two16-bittimerswith2channels（usedasIC,OC,PWM）,quadratureencoder

–One16-bitadvancedcontroltimerwith3channels,supportingmotorcontrol

–One8-bittimerwith7-bitprescaler

–2watchdogs:

1Window,1Independent

–Beepertimerwith1,2or4kHzfrequencies

■Communicationinterfaces

–Synchronousserialinterface（SPI）

–FastI2C400kHzSMBusandPMBus

–USART（ISO7816interfaceandIrDA）

■Upto41I/Os,allmappableoninterruptvectors

■Upto16capacitivesensingchannelswithfreefirmware

■Developmentsupport

–Faston-chipprogrammingandnonintrusivedebuggingwithSWIM

–BootloaderusingUSART

■96-bituniqueID

图1.STM8L15xxx方框图

图2.STM8L15x时钟树框图

STM8L15LPBOARD超低功耗演示板

STM8L15LPBOARDlow-powerdemonstrationboardTheSTM8L15LPBOARDlow-powerdemonstrationboarddemonstratesalltheSTM8L15xlow-powermodes,andpermitstheusertotakeconsumptionmeasurementsinallmodes.

STM8L15LPBOARD演示板主要特性:

■SWIMdebugsupport

■MCUconsumptionauto-measurementcircuit

■Functionandwakeupbuttons

■32.768kHzquartz

■MCUpinsconnector

图3.STM8L15LPBOARD演示板外形图

图4.STM8L15LPBOARD（MB870B）电路图

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图5.STM8L15LPBOARD（MB870B）电路图

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图6.STM8L15LPBOARD（MB870B）电路图（3）

图7.STM8L15LPBOARD（MB870B）电路图（4）

图8.STM8L15LPBOARD（MB870B）电路图（5）

图9.STM8L15LPBOARD（MB870B）电路图（6）