编写程序,利用定时/计数器T0产生定时时钟从P1.0输出频率为100KHz的等宽矩形波,设单片机的晶振频率为12MHz。
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某AT89C51单片机串行口,传送数据的帧格式由1个起始位(0)、7个数据位、1个偶校验和1个停止位(1)组成。当该串行口每分钟传送1800个字符时,试计算出它的波特率。
利用扩展的DAC0832可以输出不同规则的波形,简述其原理。
选词填空。on time/ annoy/ on the basis of/ start with/ at hand/ show up/ has to do with/ as a whole/ make time/ firmOne of the cultural differences that tend to ______ Americans ______ understanding of punctuality
选词填空。on time/ annoy/ on the basis of/ start with/ at hand/ show up/ has to do with/ as a whole/ make time/ firmGetting ahead at work ______ getting to work ______!