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1、AtmelATSAMR21LED驱动器参考设计时间：2016-01-1211:04:41作者：Atmel来源：中电网Atmel公司的ATSAMR21是采用32位ARM®Cortex®-M0+处理器的低功耗微控制器,集成了超低功耗2.4GHzISM频段收发器,256KB闪存,32KBSRAM,最大工作频率48MHz,达到2.46Coremark/MHz.I作频率1.8V-3.6V,主要用在ZigBee照明.本文介绍了SAMR21主要特性,MCU框图和内部连接图，以及具有ZigBee光连接的ATSAMR21LED驱动器AT13518主要特性，电路图和材料清单,P
2、CB设计图.TheAtmel®
3、SMART™SAMR21isaseriesoflow-powermicrocontrollersusingthe32-bitARM®Cortex®-M0+processorandanintegratedultra-lowpower2.4GHzISMbandtransceiver.SAMR21devicesareavailablein32・and48-pinpackageswithupto256KBFlash,32KBofSRAMandareoperatingatamaximumfrequencyof48MHzandreach2
4、.46Coremark/MH乙Theyaredesignedforsimpleandintuitivemigrationwithidenticalperipheralmodules,hexcompatiblecode,identicallinearaddressmapandpincompatiblemigrationpathsbetweenalldevicesintheproductseries・Alldevicesineludeintelligentandflexibleperipherals,AtmelEventSystemforinter-periph
5、eralsignaling,andsupportforcapacitivetouchbutton,sliderandwheeluserinterfaces.TheAtmelSAMR21devicesprovidethefollowingfeatures:In-systemprogrammableFlash,optional512KBserialFlash,12-channeldirectmemoryaccess(DMA)controller,12-channelEventSystem,programmableinterruptcontroller,upto2
6、8programmableI/Opins,ultra-lowpower2.4GHzISMbandtransceiverwithadatarateof250kb/s,32-bitreal-timeclockandcalendar,three16・bitTimer/Counters(TC)andthree16-bitTimer/CountersforControl(TCC),whereeachTCcanbeconfiguredtoperformfrequencyandwaveformgeneration,accurateprogramexecutiontimin
7、gorinputcapturewithtimeandfrequencymeasurementofdigitalsignals.TheTCscanoperatein8-or16-bitmode,selectedTCscanbecascadedtoforma32-bitTC,andthethreeTimer/CountersforControlhaveextendedfunctionsoptimizedformotor,lightingandothercontrolapplications.Theseriesprovideonefull-speedUSB2.0e
8、mbeddedhostanddeviceinterface;uptofiveSerialCommunicationModules(SERCOM)thateachcanbeconfiguredtoactasanUSART,UART,SPI,I2Cup3.4MHzandLINslave;uptoeightchannel350ksps12-bitADCwithprogrammablegainandoptionaloversamplinganddecimationsupportingupto16-bitresolution,twoanalogcomparatorsw
9、ithwindowmode,PeripheralTo
