单片机应用技术中断系统应用:单元作业练习题

nid="ylr3anatp6fp4hik5z9zya" data-questiontype="1" data-num="1" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

单片机中断系统有几个中断源?

A
1
B
2
C
4
D
5

参考答案: D

解析:

无

nid="ylr3anatarbkxzfkoxjqgw" data-questiontype="1" data-num="2" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

2.(5分)

单选题

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关于中断优先级,下面说法不正确的是哪一个?

A
低优先级可被高优先级中断
B
高优先级不能被低优先级中断
C
任何一种中断一旦得到响应,不会再被它的同级中断源所中断
D
自然优先级中INT0优先级*高,任何时候它都可以中断其他4个中断源正在执行的服务

参考答案: D

解析:

无

nid="ylr3anat9zzkqloowqjiw" data-questiontype="1" data-num="3" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

3.(5分)

单选题

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中断请求,CPU在响应中断后,必须在中断服务程序中用软件将其清除。

A
T0
B
T1
C
外部中断
D
串行口中断

参考答案: D

解析:

无

nid="ylr3anatvqvmllmr5b8zwq" data-questiontype="3" data-num="4" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

4.(5分)

判断题

在同一个优先级别中,多个中断源按照自然优先权顺序被响应。

A) 正确
B) 错误

参考答案: A

解析:

无

nid="ylr3anatgj9gww0lkiuacq" data-questiontype="1" data-num="5" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

5.(5分)

单选题

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当T1在下列哪种情况下, T1中断请求标志位TF1自动置1,向CPU申请中断。

A
赋初值时
B
计数溢出
C
启动时
D
设置工作方式时

参考答案: B

解析:

无

nid="ylr3anat9lvogneojs9gaa" data-questiontype="3" data-num="6" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

6.(5分)

判断题

中断系统是单片机的一个外部设备。

A) 正确
B) 错误

参考答案: B

解析:

无

nid="ylr3anatorpin5ub964dfg" data-questiontype="1" data-num="7" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

7.(5分)

单选题

nly="readonly" name="getScore" value="0" disabled="disabled" style="color: red; font-style: inherit; font-variant: inherit; font-weight: 700; font-stretch: inherit; font-size: 20px; line-height: 1.2; font-family: Constantia, Georgia; text-rendering: optimizelegibility; -webkit-font-smoothing: antialiased; cursor: not-allowed; vertical-align: middle; display: block; width: 75px; padding: 5px 10px; background: rgb(238, 238, 238); border-width: 1px; border-style: solid; border-color: rgb(221, 221, 221); border-radius: 0px; transition: border-color 0.15s ease-in-out 0s, box-shadow 0.15s ease-in-out 0s, -webkit-box-shadow 0.15s ease-in-out 0s; text-align: center; position: absolute;"/>

要编写定时器T1的中断服务程序,按如下编写: void timer1() interrupt n 其中n应为哪一个?

A
1
B
2
C
3
D
4

参考答案: C

解析:

无

nid="ylr3anat55xcnsqv4unoiw" data-questiontype="3" data-num="8" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

8.(5分)

判断题

单片机的中断系统提高了CPU的工作效率。

A) 正确
B) 错误

参考答案: A

解析:

无

nid="ylr3anatv7tefvaiwcrfjg" data-questiontype="1" data-num="9" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

9.(5分)

单选题

nly="readonly" name="getScore" value="5" disabled="disabled" style="color: red; font-style: inherit; font-variant: inherit; font-weight: 700; font-stretch: inherit; font-size: 20px; line-height: 1.2; font-family: Constantia, Georgia; text-rendering: optimizelegibility; -webkit-font-smoothing: antialiased; cursor: not-allowed; vertical-align: middle; display: block; width: 75px; padding: 5px 10px; background: rgb(238, 238, 238); border-width: 1px; border-style: solid; border-color: rgb(221, 221, 221); border-radius: 0px; transition: border-color 0.15s ease-in-out 0s, box-shadow 0.15s ease-in-out 0s, -webkit-box-shadow 0.15s ease-in-out 0s; text-align: center; position: absolute;"/>

MCS-51系列单片机CPU开中断语句是。

A
EA=1;
B
ES=1;
C
EA=0;
D
EX0=1;

参考答案: A

解析:

无

nid="ylr3anat47vhrqql5jlmww" data-questiontype="1" data-num="10" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

10.(5分)

单选题

nly="readonly" name="getScore" value="5" disabled="disabled" style="color: red; font-style: inherit; font-variant: inherit; font-weight: 700; font-stretch: inherit; font-size: 20px; line-height: 1.2; font-family: Constantia, Georgia; text-rendering: optimizelegibility; -webkit-font-smoothing: antialiased; cursor: not-allowed; vertical-align: middle; display: block; width: 75px; padding: 5px 10px; background: rgb(238, 238, 238); border-width: 1px; border-style: solid; border-color: rgb(221, 221, 221); border-radius: 0px; transition: border-color 0.15s ease-in-out 0s, box-shadow 0.15s ease-in-out 0s, -webkit-box-shadow 0.15s ease-in-out 0s; text-align: center; position: absolute;"/>

中断是指通过什么来改变CPU的执行方向?

A
硬件
B
软件
C
调用函数
D
选择语句

参考答案: A

解析:

无

nid="ylr3anatrpzhroz1ljsyg" data-questiontype="1" data-num="11" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

11.(5分)

单选题

nly="readonly" name="getScore" value="5" disabled="disabled" style="color: red; font-style: inherit; font-variant: inherit; font-weight: 700; font-stretch: inherit; font-size: 20px; line-height: 1.2; font-family: Constantia, Georgia; text-rendering: optimizelegibility; -webkit-font-smoothing: antialiased; cursor: not-allowed; vertical-align: middle; display: block; width: 75px; padding: 5px 10px; background: rgb(238, 238, 238); border-width: 1px; border-style: solid; border-color: rgb(221, 221, 221); border-radius: 0px; transition: border-color 0.15s ease-in-out 0s, box-shadow 0.15s ease-in-out 0s, -webkit-box-shadow 0.15s ease-in-out 0s; text-align: center; position: absolute;"/>

单片机中断系统有几个中断优先级别?

A
1
B
2
C
4
D
5

参考答案: B

解析:

无

nid="ylr3anat7qjkzd3jfunucw" data-questiontype="3" data-num="12" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

12.(5分)

判断题

如果CPU正在响应更高优先级别的中断请求,当前请求将不会响应。

A) 正确
B) 错误

参考答案: A

解析:

无

nid="ylr3anatabklj9z6caflq" data-questiontype="1" data-num="13" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

13.(5分)

单选题

nly="readonly" name="getScore" value="5" disabled="disabled" style="color: red; font-style: inherit; font-variant: inherit; font-weight: 700; font-stretch: inherit; font-size: 20px; line-height: 1.2; font-family: Constantia, Georgia; text-rendering: optimizelegibility; -webkit-font-smoothing: antialiased; cursor: not-allowed; vertical-align: middle; display: block; width: 75px; padding: 5px 10px; background: rgb(238, 238, 238); border-width: 1px; border-style: solid; border-color: rgb(221, 221, 221); border-radius: 0px; transition: border-color 0.15s ease-in-out 0s, box-shadow 0.15s ease-in-out 0s, -webkit-box-shadow 0.15s ease-in-out 0s; text-align: center; position: absolute;"/>

当CPU响应外部中断0 INT0的中断请求后,程序计数器PC的内容是。

A
0003H
B
000BH
C
00013H
D
001BH

参考答案: A

解析:

无

nid="ylr3anatkoday8pl0qxakw" data-questiontype="3" data-num="14" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

14.(5分)

判断题

中断服务程序和子函数的调用过程完全一样。

A) 正确
B) 错误

参考答案: B

解析:

无

nid="ylr3anatj6lkkys5bejoaq" data-questiontype="3" data-num="15" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

15.(5分)

判断题

定时器T0的计满溢出中断是外部中断。

A) 正确
B) 错误

参考答案: B

解析:

无

nid="ylr3anat1ptetg6hcttv9q" data-questiontype="3" data-num="16" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

16.(5分)

判断题

只要提出中断请求,CPU会立刻响应中断。

A) 正确
B) 错误

参考答案: B

解析:

无

nid="ylr3anatuoxebdqik0zkrw" data-questiontype="3" data-num="17" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

17.(5分)

判断题

定时器的中断请求标志,其撤除办法是由硬件自动完成的。

A) 正确
B) 错误

参考答案: A

解析:

无

nid="ylr3anaterddcddzan0ylq" data-questiontype="3" data-num="18" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

18.(5分)

判断题

单片机所连接的所有外部设备都可以是中断源。

A) 正确
B) 错误

参考答案: B

解析:

无

nid="ylr3anatmkho08kpi0cmcg" data-questiontype="3" data-num="19" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

19.(5分)

判断题

要想响应中断,总允许为EA必须为1。

A) 正确
B) 错误

参考答案: A

解析:

无

nid="ylr3anatr4ppzauphsvmiw" data-questiontype="1" data-num="20" style="color: rgb(51, 51, 51); font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", FontAwesome, sans-serif; font-size: 14px; background-color: rgb(241, 240, 240);">

20.(5分)

单选题

nly="readonly" name="getScore" value="5" disabled="disabled" style="color: red; font-style: inherit; font-variant: inherit; font-weight: 700; font-stretch: inherit; font-size: 20px; line-height: 1.2; font-family: Constantia, Georgia; text-rendering: optimizelegibility; -webkit-font-smoothing: antialiased; cursor: not-allowed; vertical-align: middle; display: block; width: 75px; padding: 5px 10px; background: rgb(238, 238, 238); border-width: 1px; border-style: solid; border-color: rgb(221, 221, 221); border-radius: 0px; transition: border-color 0.15s ease-in-out 0s, box-shadow 0.15s ease-in-out 0s, -webkit-box-shadow 0.15s ease-in-out 0s; text-align: center; position: absolute;"/>

主程序被打断的地方称为什么?

A
中断源
B
入口地址
C
中断矢量
D
断点

参考答案: D

解析:

无

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单片机应用技术中断系统应用:单元作业练习题