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1、FreescaleKEA12汽车光控制模块参考设计Freescale公司的KinetisEA系列MCU是基于ARM核的高成本效益的汽车电子解决方案,适用于汽车各种应用如娱乐连接模块，停车辅助,DC/BLDC马达控制,TPMS,电动自行车CDI/EFI,电池管理，泵/风扇控制器,坏境照明,BCM/HVAC,车窗/门/车顶，座位/镜/雨刷,动力总成姐妹芯片，传感器节点和发动机防盗系统.本文介绍了KEA128主要特性，框图，以及光控制模块参考设计KEA128LEDLIGHTRD主要特性和框图，电路图.KinetisEAseriesMCUsfo
2、rautomotiveprovidecost-effectiveARM®・basedsolutionforawiderangeofautomotiveapplicationsandarepin-compatibleacrosstheKinetisEAseriesandwithfutureKinetisautomotivefamilies.Thisseriesineludesasetofanalog,communication,timingandcontrolperipheralswithvaryingflashmemorysizeand
3、pincount.Thesescalabledevicesarehighlyrobust,andofferanenhancedESD/EMCperformsneesolutionforcost-sensitiveautomotiveapplications.Thisseriesissupportedbydevelopmenttools,softwareandhardwarereferencestohelpyouquicklystartdesigning.KEA128主要特性：•Operatingcharacteristics一Volta
4、gerange:2.7to5.5V一Flashwritevoltagerange:2.7to5.5V一Temperaturerange(ambient):-40to125°C•Performance一Upto48MHzARM?Cortex-M0+core一Singlecycle32-bitx32-bitmultiplier一SinglecycleI/Oaccessport•Memoriesandmemoryinterfaces一Upto128KBflash-Upto16KBRAM•Clocks一Oscillator(OSC)-suppo
5、rts32.768kHzcrystalor4MHzto24MHzcrystalorceramicresonator;choiceoflowpowerorhighgainoscillators一Internalclocksource(ICS)-internalFLLwithinternalorexternalreference,37.5kHzpre-trimmedinternalreferencefor48MHzsystemclock-Internal1kHzlow-poweroscillator(LPO)•Systemperiphera
6、ls一Powermanagementmodule(PMC)withthreepowermodes:Run,Wait,Stop一Low-voltagedetection(LVD)withresetorinterrupt,selectabletrippoints-Watchdogwithindependentclocksource(WDOG)一Programmablecyclicredundancycheckmodule(CRC)一Serialwiredebuginterface(SWD)-AliasedSRAMbitbandregion(
7、BIT-BAND)一Bitmanipulationengine(BME)•Securityandintegritymodules一80-bituniqueidentification(ID)numberperchip•Human-machineinterface一Upto71general-purposeinput/output(GPIO)-Two32-bitkeyboardinterruptmodules(KBI)一Externalinterrupt(IRQ)•Analogmodules一Oneupto16-channel12-bit
8、SARADC,operationinStopmode,optionalhardwaretrigger(ADC)-Twoanalogcomparatorscontaininga6-bitDACandprogr
