单片机期末考试题目及答案

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1、leading cadres awareness of right in place, study the party Constitution and party rules, series of speeches can make proper effect. Party cadres to two lead by example, to lead by example we must change our mind, recognizing that two is important. First, learn the Communist Party Constitution Party

2、 rules, learning learning series important speech by General Secretary can enhance theory. With the third revolution the rise of rapid changes in our life are feeling, the Communists should adhere to the theory of confidence will continue to learn from the voices of the times, the times, in turn, wi

3、ll have new requirements for leading party cadres. Two is the most basic meaning of members all mastering the core theory and the most advanced weapons theory, complement the spirit of calcium. Secondly, the Communist Party Constitution Party rules, learning learning series important speech by Gener

4、al Secretary be able to firmly build the ideological foundation. Under the impact of multiple values, the two is to help cultivate independent judgment in numerous miscellaneous multiple concepts, so that the majority consensus of party members, the important magic weapon of the party with the reson

5、ance frequency. Finally, the Constitution of the Communist Party, party rules, learning learning series important speech can stand crowds, General Secretary position. Now, some grass-roots work in the the old way didnt work, hard way cannot, the new approach would not phenomenon, sometimes due to a

6、mass of party members and cadres not understanding, does not meet. In fact, the mass convincing and identityBehind are likely to be party members and leading cadres themselves ignoring beliefs held, resulting in lack of persuasion and sense of identity. Two is in fact guaranteed party cadres work, a

7、n important prerequisite for convincing the masses. Bacon said it well: practical men can handle individual matters, but looking at the whole operation globally, but only man can do to knowledge. Giving up two effective, must first raise awareness of leading cadres of party members, as party members

8、 learn real responsibility to know to music , good changes, in parallel with the ground, do not forget to also answer the antenna, draw catches on meteorology, which sit between heaven and Earth which melds together the dreams of practicing Communist. Members cadres should in two learn a do in the b

9、ased post do contribution in all members in the carried out learn Constitution Party rules, and learn series speech, do qualified members learning education, this is following party of mass line education practice activities and three strict three real topic education zhihou, deepening party educati

10、on of and once important practice, is promoted three strict three real topic education from key minority to all members expand, and from concentrated education to regular education extends of important initiatives. Vast numbers of party members and cadres in the course of two, should be单片机练习题一、填空题1、

11、若不使用MCS-51片内的存储器,引脚必须接 。 2、 MCS-51有4个并行I/O口,其中P1P3口是准双向口,所以由输出转输入时必须先写入 。3、 MCS-51中有4组工作寄存器,它们的地址范围是 。4、在MCS-51系统中,若用传送指令访问程序存储器,它的操作码助记符是 。5、在MCS-51系统中,若用传送指令访问片外RAM,它的操作码助记符是 。6、累加器(A)=80H,执行完ADD A,#83H后,标志Cy= 。7、MOV PSW,#10H是将MCS-51的工作寄存器组置为第 组。8、设DPTR=2000H,(A)=80H,则MOVC A,A+DPTR源操作数的实际地址为 。9、PS

12、W中的RS0 RS1=11H时,R2的地址为 。 10、若单片机的使用的频率为6MHz的晶振,那么振荡周期为 ;机器周期为 ;指令周期为 。11、假定(A)=85H,(R0)=20H,(20H)=0AFH。执行下列指令后,A的内容为 ;Cy的内容为 ;AC的内容为 ;P的内容为 。 ADD A,R012、MCS-51的两条查表指令是 和 。13、MCS-51中21个特殊功能寄存器凡是能被8整除的都有 寻址功能。14、MCS-51片内20H2FH范围内的数据存储器,既可以字节寻址又可以 寻址。15、在MCS-51系统中,若用传送指令访问片内RAM,它的操作码助记符是 。16、计算机的系统总线分别

13、由 总线、 总线和 总线组成。17、执行ANL A,#0FH指令后,累加器A的高4位= 。18、ORL A,#0F0H是将A的高4位置1,而低4位 。19、12根地址线可寻址 KB的存储单元。20、假定(SP)=60H,(A)=30H,(B)=70H,执行下列指令后,SP的内容为 ;61H单元的内容为 ;62H单元的内容为 。PUSH A PUSH B21、MCS-51芯片的TXD和RXD引脚的作用是 。22、MCS-51单片机是( )位的单片机。23、MCS-51单片机有( )个中断源,( )级优先级中断。24、串行口方式3发送的第9位数据要事先写入( )寄存器的( )位。25、串行口的方式

14、0的波特率为 ( )。26、8051内部数据存储器的地址范围是( ),位地址空间的字节地址范围是( ),对应的位地址范围是( ),外部数据存储器的最大可扩展容量是( )。27、已知fosc=12MHz,T0作为定时器使用时,其定时时间间隔为( )。28、串行口方式2接收到的第9位数据送( )寄存器的( )位中保存。29、当单片机复位时PSW( )H,这时当前的工作寄存器区是( )区,R6所对应的存储单元地址为( )H。30、若A中的内容为67H,那么,P标志位为( )。31、MCS-51单片机的通讯接口有( )和( )两种型式。在串行通讯中,发送时要把( )数据转换成( )数据。接收时又需把( )数据转换成( )数据。32、MCS-51内部提供( )个可编程的( )位定时/计数器,定时器有( )种工作方式。33、MCS-51复位后

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