{首页主词},&

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);">

單片機中斷系統(tǒng)有幾個中斷源?

A
1
B
2
C
4
D
5

參考答案: D

解析:

無

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)

單選題

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;"/>

關于中斷優(yōu)先級,下面說法不正確的是哪一個?

A
低優(yōu)先級可被高優(yōu)先級中斷
B
高優(yōu)先級不能被低優(yōu)先級中斷
C
任何一種中斷一旦得到響應,不會再被它的同級中斷源所中斷
D
自然優(yōu)先級中INT0優(yōu)先級*高,任何時候它都可以中斷其他4個中斷源正在執(zhí)行的服務

參考答案: D

解析:

無

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)

單選題

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;"/>

中斷請求,CPU在響應中斷后,必須在中斷服務程序中用軟件將其清除。

A
T0
B
T1
C
外部中斷
D
串行口中斷

參考答案: D

解析:

無

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)

判斷題

在同一個優(yōu)先級別中,多個中斷源按照自然優(yōu)先權順序被響應。

A) 正確
B) 錯誤

參考答案: A

解析:

無

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)

單選題

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;"/>

當T1在下列哪種情況下, T1中斷請求標志位TF1自動置1,向CPU申請中斷。

A
賦初值時
B
計數(shù)溢出
C
啟動時
D
設置工作方式時

參考答案: B

解析:

無

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)

判斷題

中斷系統(tǒng)是單片機的一個外部設備。

A) 正確
B) 錯誤

參考答案: B

解析:

無

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)

單選題

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;"/>

要編寫定時器T1的中斷服務程序,按如下編寫: void timer1() interrupt n 其中n應為哪一個?

A
1
B
2
C
3
D
4

參考答案: C

解析:

無

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)

判斷題

單片機的中斷系統(tǒng)提高了CPU的工作效率。

A) 正確
B) 錯誤

參考答案: A

解析:

無

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)

單選題

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系列單片機CPU開中斷語句是。

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

參考答案: A

解析:

無

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)

單選題

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;"/>

中斷是指通過什么來改變CPU的執(zhí)行方向?

A
硬件
B
軟件
C
調(diào)用函數(shù)
D
選擇語句

參考答案: A

解析:

無

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)

單選題

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;"/>

單片機中斷系統(tǒng)有幾個中斷優(yōu)先級別?

A
1
B
2
C
4
D
5

參考答案: B

解析:

無

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)

判斷題

如果CPU正在響應更高優(yōu)先級別的中斷請求,當前請求將不會響應。

A) 正確
B) 錯誤

參考答案: A

解析:

無

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)

單選題

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;"/>

當CPU響應外部中斷0 INT0的中斷請求后,程序計數(shù)器PC的內(nèi)容是。

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

參考答案: A

解析:

無

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)

判斷題

中斷服務程序和子函數(shù)的調(diào)用過程完全一樣。

A) 正確
B) 錯誤

參考答案: B

解析:

無

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)

判斷題

定時器T0的計滿溢出中斷是外部中斷。

A) 正確
B) 錯誤

參考答案: B

解析:

無

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)

判斷題

只要提出中斷請求,CPU會立刻響應中斷。

A) 正確
B) 錯誤

參考答案: B

解析:

無

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)

判斷題

定時器的中斷請求標志,其撤除辦法是由硬件自動完成的。

A) 正確
B) 錯誤

參考答案: A

解析:

無

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)

判斷題

單片機所連接的所有外部設備都可以是中斷源。

A) 正確
B) 錯誤

參考答案: B

解析:

無

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)

判斷題

要想響應中斷,總允許為EA必須為1。

A) 正確
B) 錯誤

參考答案: A

解析:

無

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)

單選題

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;"/>

主程序被打斷的地方稱為什么?

A
中斷源
B
入口地址
C
中斷矢量
D
斷點

參考答案: D

解析:

無

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單片機應用技術中斷系統(tǒng)應用:單元作業(yè)練習題