(完整word版)51单片机考试常见试题选择题.pdf

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1、二、选择题1.80C51 基本型单片机内部程序存储器容量为（C）。（A）16K （B）8K （C）4K （D）2K 2.在 80C51单片机应用系统中，可以作为时钟输出的是（C）引脚。（A）RXD （B）RST （C）ALE （D）XTAL1 3.在 80C51的 4 个并行口中，能作为通用I/O 口和高 8 位地址总线的是（C）。（A）P0 （B）P1 （C）P2 （D）P3 4.所谓 CPU是指（A）A、运算器和控制器B、运算器和存储器 C、输入输出设备D、控制器和存储5.在 80C51中，要访问SFR使用的寻址方式为（A）。（A）直接寻址（B）寄存器寻址（C）变址寻址（D）寄存器间接寻址

2、6.以下的 4 条指令中，不合法的指令为（D）。（A）INC A （B）DEC A （C）INC DPTR （D）SWAP ACC 7.要用传送指令访问MCS-51片外 RAM，它的指令操作码助记符应是（B）（A）MOV （B）MOVX （C）MOVC （D）以上都是8.指令 AJMP的跳转范围是（C）精品资料-欢迎下载-欢迎下载 名师归纳-第 1 页，共 10 页 -（A）256B （B）1KB （C）2KB （D）64KB 9.在 CPU内部，反映程序运行状态或反映运算结果的一些特征的寄存器是（B）（A）PC （B）PSW （C）A （D）SP 10.下列四条叙述中，有错误的一条是（A）（

3、A）16 根地址线的寻址空间可达1MB（B）内存储器的存储单元是按字节编址的（C）CPU中用于存放地址的寄存器称为地址寄存器（D）地址总线上传送的只能是地址信息11.PSW=18H时，则当前工作寄存器是（D）（A）0 组(B)1组（C）2 组（D）3 组12.8051与 8751 的区别是：（C）（A）内部数据存储单元数目的不同（B）内部数据存储器的类型不同（C）内部程序存储器的类型不同（D）内部的寄存器的数目不同13.在家用电器中使用单片机应属于微计算机的（B）（A）辅助设计应用（B）测量、控制应用（C）数值计算应用（D）数据处理应用14.中断查询确认后，在下列各种8031 单片机运行情况中

4、，能立即进行响应的是：（D）（A）当前正在执行高优先级中断处理精品资料-欢迎下载-欢迎下载 名师归纳-第 2 页，共 10 页 -文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 Z

5、S4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档

6、编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V

7、9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6

8、 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3

9、文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V

10、8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3（B）当前正在执行RETI 指令（C）当前指令是DIV 指令，且正处于取指令的机器周期（D）当前指令是MOV A,R3 15.下列说法

11、错误的是：（B）（A）同一级别的中断请求按时间的先后顺序响应。（B）同一时间同一级别的多中断请求，将形成阻塞，系统无法响应。（C）低优先级中断请求不能中断高优先级中断请求，但是高优先级中断请求能中断低优先级中断请求。（D）同级中断不能嵌套。16.定时器/计数器工作于模式1 时，其计数器为几位？（B）(A)8位(B)16位(C)14位(D)13 位17.堆栈数据的进出原则是（B）(A)先进先出 (B)先进后出 (C)后进后出(D)进入不出18.开机复位后，CPU使用的是寄存器第一组，地址范围是（B）(A)00H-10H(B)00H-07H(C)10H-1FH (D)08H-0FH 19.若某存储

12、器芯片地址线为12 根,那么它的存储容量为精品资料-欢迎下载-欢迎下载 名师归纳-第 3 页，共 10 页 -文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E

13、3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1

14、V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D

15、1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X

16、7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9

17、L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A

18、7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3（C）(A)1KB(B)2KB(C)4KB (D)8KB 20.控制串行接口工作方式的寄存器是（C）(A)TCON(B)PCON(C)SCON (D)TM

19、OD 21.要使 MCS-51能够响应定时器T1 中断，串行接口中断，它的中断允许寄存器IE 的内容应是（A）（A）98H （B）84H （C）42H （D）22H 22.51 执行完 MOV A，#08H后，PSW 的一位被置位（D）（A）C（B）F0（C）OV（D）P 23.计算机中最常用的字符信息编码是（A）(A)ASCII (B)BCD码 (C)余 3 码 (D)循环码24.某种存储器芯片是8KB*4/片，那么它的地址线根数是（C ）(A)11 根（B）12 根（C）13 根（D）14 根25.在 MCS-51 系统中，若晶振频率是8MHz，一个机器周期等于(A )s（A）1.5 （B

20、）3 （C）1 （D）0.5 26.MCS-51 的时钟最高频率是 (A ).（A）12MHz （B）6 MHz（C）8 MHz （D）10 MHz 精品资料-欢迎下载-欢迎下载 名师归纳-第 4 页，共 10 页 -文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H

21、6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E

22、3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1

23、V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D

24、1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X

25、7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9

26、L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E327.口的每一位能驱动（B）（A）个 TTL

27、低电平负载（B）4 个 TTL低电平负载（C）个 TTL低电平负载（D）10 个 TTL低电平负载28.对程序存储器的读操作，只能使用（D）（A）MOV 指令（B）PUSH 指令（C）MOVX 指令（D）MOVC指令29.要想测试INT0 引脚上的一个正脉冲宽度,那么特殊功能寄存器 TMOD 的内容应为(A)(A)09H (B)87 H (C)00H (D)80H 30.在中断服务程序中,至少应有一条(D )（A）传送指令（）转移指令（C）加法指法（D）中断返回指令31.控制串行口工作方式的寄存器是（C）（A）TCON (B)PCON (C)SCON (D)TMOD 32.下列说法正确的是：（

28、D）（A）各中断发出的中断请求信号，都会标记在MCS 51 系统的 IE 寄存器中。（B）各中断发出的中断请求信号，都会标记在MCS 51 系统的 TMOD 寄存器中。（C）各中断发出的中断请求信号，都会标记在MCS 51 系统的 IP 寄存器中。（D）各中断发出的中断请求信号，都会标记在MCS 51 系精品资料-欢迎下载-欢迎下载 名师归纳-第 5 页，共 10 页 -文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS

29、4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编

30、码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9

31、 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6

32、ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文

33、档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8

34、V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H

35、6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3统的 TCON 与 SCON 寄存器中。33.下面哪一种传送方式适用于处理外部事件(C )(A)DMA (B)无条件传送 (C)中断 (D)条件传递34.MOV C，#00H的寻址方式是（A）。（A）位寻址（B）直接寻址（C）立即寻址（D）寄存器寻址35.MCS 51 系列中断源有（A）。（A）5 个（B）2 个（C）3 个（D）6个36.使用定时器T1 时，有几种工作模式（C）（）种）种）种（）种37.执行 MOVX A，DPTR 指令时，MCS-51产生的控制信号是（C）。（A）/

36、PSEN（B）ALE（C）/RD（D）/WR 38.当优先级的设置相同时，若以下几个中断同时发生，（D）中断优先响应。（A）外部中断1（B）T1（C）串口（D）T0 39.当需要扩展一片8K的 RAM 时，应选用的存储器为（B）。（A）2764（B）6264（C）6116（D）62128 40.若想扩展键盘和显示，并希望增加256 字节的 RAM时，应选择（A）芯片。精品资料-欢迎下载-欢迎下载 名师归纳-第 6 页，共 10 页 -文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E

37、3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1

38、V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D

39、1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X

40、7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9

41、L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A

42、7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q

43、5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3（A）8155（B）8255（C）8279（D）74LS164 41.80C51 单片机要进行10 位帧格式的串行通讯时，串行口应工作在（B）。（A）方式 0（B）方式 1（C）方式 2（D）方式 3 42.要使 MCS-51能够响应定时器T1 中断、串行接口中断，它的中断允许寄存器IE 的内容应是（A ）（）98H（）84H（）42 （）22H 43.CPU寻址外设端口地址的方法有两种，一种是统一编址，还有一种是（C）（

44、A）混合编址（B）动态编址（C）独立编址（D）变址编址44.MCS-51 外扩一个 8255 时，需占用（D）个端口地址（A）1 个（B）2 个（C）3 个（D）4 个45MCS-51用串行扩展并行I/O 口时，串行接口工作方式选择（A ）（A）方式 0（B）方式 1（C）方式 2（D）方式 3 46使用 8255 可以扩展出的I/O 口线是（B ）（A）16 根（B）24 根（C）22 根（D）32 根47当 8031 外出扩程序存储器8KB时，需使用EPROM 2716（C）（A）2 片（B）3 片（C）4 片（D）5 片精品资料-欢迎下载-欢迎下载 名师归纳-第 7 页，共 10 页 -

45、文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V

46、8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1

47、H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7

48、E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L

49、1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7

50、D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5X7E3文档编码:CD8G9L1V8V9 HW1A6A7D1H6 ZS4Z10Q5