[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fAhuL9EqIw0TRluZFOYw7uhDhxl4LQnd1EMmG6hualUU":3},{"id":4,"source":5,"question":6,"options":7,"answer":12,"related":13,"type":24,"origin":73,"createTime":26},159773963,"v1","AVR单片机具有内部时钟,在使用过程中为什么有时候还需要使用外部时钟",[8,9,10,11],"内部时钟只有1、2、4、8MHz,在应用过程中可能需要使用其他时钟频率","AVR单片机具有内部时钟为RC振荡,其在温度变化时频率会变化,不利于异步通讯","AVR单片机具有内部时钟为RC振荡,不同单片机个体差异较大","必须同时使用内部和外部时钟",[],[14,27,31,43,53,63],{"id":15,"source":5,"question":16,"options":17,"answer":22,"related":23,"type":24,"origin":25,"createTime":26},159773961,"AVR单片机时钟可以使用内部的时钟频率为",[18,19,20,21],"1MHz","2MHz","4MHz","8MHz",[],[],1,null,"2024-09-20T16:04:24+08:00",{"id":4,"source":5,"question":6,"options":28,"answer":29,"related":30,"type":24,"origin":25,"createTime":26},[8,9,10,11],[],[],{"id":32,"source":5,"question":33,"options":34,"answer":39,"related":40,"type":41,"origin":25,"createTime":42},159773965,"使用CVAVR软件编写软件是,对ATMEGA16操作前,我们应该使用的头文件是",[35,36,37,38],"#include \"stdio.h\"","#include \"math.h\"","#include \"mega16.h\"","#include \"string.h\"",[],[],0,"2024-09-20T16:04:25+08:00",{"id":44,"source":5,"question":45,"options":46,"answer":51,"related":52,"type":41,"origin":25,"createTime":42},159773967,"CVAVR编程及时,它的入口函数为",[47,48,49,50],"void main(void)","随便什么名称","void entrance(void)","void Main(void)",[],[],{"id":54,"source":5,"question":55,"options":56,"answer":61,"related":62,"type":41,"origin":25,"createTime":42},159773969,"CVAVR编写程序过程中,使C端口的PC0引脚为输出,其他为输入的代码为",[57,58,59,60],"Ddrc = 0x01","ddrc = 0x01","DDRC = 0x01","都可以",[],[],{"id":64,"source":5,"question":65,"options":66,"answer":71,"related":72,"type":41,"origin":25,"createTime":42},159773971,"要使用延时函数,应该包含的头文件是",[67,68,69,70],"io.h","string.h","time.h","delay.h",[],[],{"courseName":74,"courseImg":75,"workName":76,"workId":77,"count":78,"courseId":79},"22级-单片机原理及应用","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0d27132e8e4c25614916fe2373258c2e.jpg","第5讲 项目一:点亮一个LED灯","012956c8810f4113ad3b2d9517d41ad0",6,"7f4a0bd4288dc529e8d88fb174c246a0"]