[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fN1kCtVzacnRtOAj9zMh0Jz3XQu3mGsFcCLp7SgUmgBA":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-06-27 20:00:36",86028490,[8,9,10,11],"降低按键的反应速度","保护电路","滤除高频杂波","消抖",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},40,"46a3ace8f92ece46e05ca20975ef92d7","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F25b30343053994e8940089572d36015b.jpg","物联网微控制器","exam_99726528","阶段测试2","STM32F103C8T6最小系统板中,按键复位电路加了一个电容C2,如下图所示.该电容的作用是( ). \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F786218b5132f4f23fceca520f697ec3c.png\">",[21,32,35,44,53,62,71,80,89,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],86028489,[25,26,27,28],"4G","8K","1K","256K","在STM32的存储器映射空间中,有一段外设专用空间,其起止地址为:0x5000 0000 – 0x5003 FFFF.试问该空间的大小为( )个基本单元","v1",0,{"answer":33,"createTime":5,"id":6,"options":34,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":30,"type":31},[],86028491,[39,40,41,42],"ICode","APB1","AHB","APB2","Cortex-M3的内核要访问GPIO,必须要打开下列哪条总线的时钟?( )",{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":30,"type":31},[],86028492,[48,49,50,51],"浮空输入;推挽复用输出","上拉输入;推挽输出","下拉输入;推挽输出","模拟输入;推挽复用输出","STM32做串口通信时,Rx和Tx引脚的工作模式应分别配置为___________和___________",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":30,"type":31},[],86028493,[57,58,59,60],"从0开始递增计数,计到预装初值产生上溢中断,随后又开始递增计数,直到产生下溢中断","预装初值可以是计数的起点值,也可以是计数的终点值,由用户自定义","从预装初值开始递增计数,直到计数溢出,产生上溢中断","从0开始递增计数,一直计到预装初值,产生上溢中断","使用STM32的通用定时器,使用向上计数模式,设置计数预装初值,它的含义是( )",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],86028494,[66,67,68,69],"PCout(13) = 0","PCout(13) = 1","RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOC , ENABLE)","status = PCin(13)","根据STM32F103C8T6最小系统板的原理图,点亮LED的电路如下图所示.控制该LED的GPIO引脚为PC13.试问下列哪条语句能点亮LED.( ) \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F802252ce80acb5dc844852e47bb6df40.png\">",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],86028495,[75,76,77,78],"14","16","10","12","STM32F103系列单片机的ADC的分辨率是多少位?( )",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],86028496,[84,85,86,87],"115200","1200","9600","19200","以下不属于单片机串口通信常见波特率的是( )",{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],86028497,[93,94,95,96],"3,3","4,3","4,4","3,4","STM32和电脑进行串口通信通常要包含RS-232 ——>USB的协议转换.最简单的RS-232电缆包含( )芯,USB电缆包含( )芯",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],86028498,[102,103,104,105],"GPIOB_ODR","GPIOB_CRL","GPIOB_CRH","GPIOB_IDR","STM32的GPIO使用频率极高.在使用GPIO时必须首先配置其工作模式,如果要用寄存器操作方式来配置PB9,需要操作下列哪个寄存器?( )"]