[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fgOmnPzoSn9Hoc8lMGhNkf1dllXYAGXTdXuD6jtu8AwA":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2023-12-28 11:54:04",123158086,[8,9,10,11],"0x01","0x07","0x0E","0x0F",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},199,"7818885f9f458c758af5439bbfb79d10","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F22b57cd268a355e61d8b11bdcc346b83.jpg","传感网应用开发","exam_111077531","2023-2024期末复习题","已知Modbus的RTU请求报文内容为&quot;0x02 0x03 0x00 0xD2 0x00 0x07 0xA4 0x02&quot;,则从设备响应报文中数据域字节数的值应为( )",[21,33,42,51,60,69,78,87,96,105],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2023-12-28 11:54:02",123157917,[26,27,28,29],"Modbus通信协议是一种传输层协议","Modbus ASCII采用纵向冗余校验方式","Modbus RTU采用循环冗余校验方式","Modbus通信协议是一种单主\u002F多从的通信协议","关于Modbus通信协议,则下述说法错误的是( )","v1",0,{"answer":34,"createTime":23,"id":35,"options":36,"question":41,"source":31,"type":32},[],123157919,[37,38,39,40],"含有三个三级深度FIFO","可以处于睡眠模式","提供了测试模式","含有三个发送邮箱","STM32F1系列微控制器内部集成了CAN控制器bxCAN,对于bxCAN说法错误的是( )",{"answer":43,"createTime":23,"id":44,"options":45,"question":50,"source":31,"type":32},[],123157921,[46,47,48,49],"传输速率可高达480Mbps","单端通讯","并行数据接口","比RS485通信更远","关于RS-232接口,说法正确的是( )",{"answer":52,"createTime":23,"id":53,"options":54,"question":59,"source":31,"type":32},[],123157923,[55,56,57,58],"29","30","28","27","CAN扩展帧的仲裁段由( )bit的标识符ID、SRR位、IDE位和RTR位构成",{"answer":61,"createTime":23,"id":62,"options":63,"question":68,"source":31,"type":32},[],123157925,[64,65,66,67],"2条信号线上电平都为2.5V左右,显性电平状态","1条为3.5V左右,另1条为1.5V左右,显性电平状态","2条信号线上电平都为0V左右,隐性电平状态","2条信号线上电平都为2.5V左右 ,隐性电平状态","高速CAN总线在不进行通信时,CAN_H与CAN_L的状态为( )",{"answer":70,"createTime":23,"id":71,"options":72,"question":77,"source":31,"type":32},[],123157928,[73,74,75,76],"247","255","1","0","Modbus消息帧中地址( )作为广播地址使用",{"answer":79,"createTime":23,"id":80,"options":81,"question":86,"source":31,"type":32},[],123157933,[82,83,84,85],"写多个保存寄存器","读保持寄存器","写多个线圈","读线圈状态","Modbus功能码0x10的作用是( )",{"answer":88,"createTime":23,"id":89,"options":90,"question":95,"source":31,"type":32},[],123157936,[91,92,93,94],"采用128分频时,最大定时时长为524.28ms","使用T1CCH和T1CC0L分别存放计数值的高、低位值","采用模模式时,不能使用溢出中断","最大计数值为65535","在CC2530中,在采用16MHz的RC震荡器做为时钟源并使用16位的定时器1,则下面关于定时器1说法错误的是( )",{"answer":97,"createTime":23,"id":98,"options":99,"question":104,"source":31,"type":32},[],123157938,[100,101,102,103],"128MHz","32MHz","32kHz","1MHz","在CC2530单片机中,常常需要设置UxBAUD与UxGCR寄存器的值,当用UxBAUD=216,UxGCR=10设置波特率为57600bit\u002Fs时,此时系统时钟频率一定是( )",{"answer":106,"createTime":23,"id":107,"options":108,"question":113,"source":31,"type":32},[],123157942,[109,110,111,112],"从节点地址是00","寄存器的起始地址是0016","此报文请求读取保持寄存器的值","寄存器个数是02","在基于RS-485的Modbus通信中,主节点发送的报文是:06 01 00 16 00 21 1C 61,则说法正确的是( )"]