8051单片机的P2口只能用作通用I/O口

答案查看网，轻松搜题/搜资源

【判断题】【消耗次数：1】

① 正确

② 错误

参考答案：

复制

纠错

相关题目

【判断题】 8051单片机的I/O口中，P1口具有第二功能。

① 正确

② 错误

查看完整题目与答案

【单选题】 8051单片机的P2口除作为输入／输出接口使用外，还可以作为____使用。

① 低8位地址总线

② 高8位地址总线

③ 数据总线

④ 控制总线

查看完整题目与答案

【单选题】 MCS-51单片机的4个并行I/O口作为通用I/O口使用，在输出数据时，必须外接上拉电阻的是____。

① P0口

② P1口

③ P2口

④ P3口

查看完整题目与答案

【单选题】 8051单片机口是一个8位漏极型开路型双向I/O端口。

① P0

② P1

③ P2

④ P3

查看完整题目与答案

【单选题】 8051单片机的P0口可以驱动____个LSTTL负载。

① 4

② 8

③ 16

④ 32

查看完整题目与答案

【单选题】 8051单片机的P0口驱动拉电流负载时必须接____。

① 电源

② 地

③ 下拉电阻

④ 上拉电阻

查看完整题目与答案

【单选题】 MCS-51单片机的P1口的功能是。

① 可作通用双向I/O口用

② 可作一般I/O口用

③ 可作地址/数据总线用

④ 可作通用I/O口用

查看完整题目与答案

【判断题】 P2口既可以作为I/O使用，又可以作地址/数据复用口使用。

① 正确

② 错误

查看完整题目与答案

【判断题】 8051单片机的P0口可作为低8位地址总线使用。

① 正确

② 错误

查看完整题目与答案

【判断题】 8051单片机的P1口可作为高8位地址总线使用。

① 正确

② 错误

查看完整题目与答案

随机题目

【单选题】 The people who ____________ cars work very quickly.

① astonish

② assemble

③ afford

④ acquire

查看完整题目与答案

【单选题】 Tommy: Mommy, when will we have dinner? I’m starving.Mother: __________ We have to wait for Daddy.

① OK, honey.

② Quickly, honey.

③ Soon, honey.

④ All right, honey.

查看完整题目与答案

【单选题】 He____________ cold and hunger a great deal.

① escaped from

② suffered from

③ kept away from

④ came from

查看完整题目与答案

【单选题】 Youdonthavetobeinsuchahurry,Iwouldratheryou________onbusinessfirst.

① wouldgo

② willgo

③ went

④ havegone

查看完整题目与答案

【单选题】 He____________ her out of her money.

① chatted

② changed

③ cheated

④ chose

查看完整题目与答案

【单选题】 Now it is illegal (非法的) to kill ______________ for their ivories.

① tigers

② lions

③ elephants

④ birds

查看完整题目与答案

【单选题】 Will you please____________ the experiment youve just made?

① repeat

② recover

③ renew

④ reform

查看完整题目与答案

【单选题】 It is necessary____________ the book immediately.

① for him to return

② that he return

③ his returning

④ to him return

查看完整题目与答案

【单选题】 Anger is a normal emotion that we all feel from time to time. Some people express anger openly in a calm reasonable way. Some explode with anger, and scream and shout. But other people keep their anger inside. They can not or will not express it. This is called repressing anger. Many doctors think that repressing anger is more dangerous to a person’s health than expressing it. They say that when a person is angry, the brain gives out the same hormones (荷尔蒙) as that are produced during tense and nervous situations. They speed the heart rate and raise blood pressure, so the person feels excited and ready to act. Repressing these feelings will only make the feelings continue, and this can lead to many medical problems. To prevent these problems, these doctors suggest letting the anger out by expressing it freely. But recently some other doctors question this. They say that people who express anger repeatedly and violently become, in fact, more but not less angry. And this could cause medical problems. However, some doctors say that both repressing and expressing anger can be dangerous. They believe that those who express anger strongly may be more likely to develop heart diseases, and that those who keep their anger inside may face a greater danger of high blood pressure. Doctors say the solution is to learn how to deal with anger. The first step is to admit that you are angry and to recognize the real cause of the anger, and then to decide if the cause is serious enough to get angry about. If it is, do not express your anger while angry. Wait until your anger has cooled down, and express yourself calmly and reasonably. Doctors also say that a good way to deal with anger is to find humor in the situation that has made you angry, for laughter is much healthier than anger.One correct way to deal with anger is to __________.

① say nothing no matter how angry you are

② express anger openly and freely right away

③ express your anger immediately but calmly

④ think about whether its worth getting angry

查看完整题目与答案

【单选题】 Anger is a normal emotion that we all feel from time to time. Some people express anger openly in a calm reasonable way. Some explode with anger, and scream and shout. But other people keep their anger inside. They can not or will not express it. This is called repressing anger. Many doctors think that repressing anger is more dangerous to a person’s health than expressing it. They say that when a person is angry, the brain gives out the same hormones (荷尔蒙) as that are produced during tense and nervous situations. They speed the heart rate and raise blood pressure, so the person feels excited and ready to act. Repressing these feelings will only make the feelings continue, and this can lead to many medical problems. To prevent these problems, these doctors suggest letting the anger out by expressing it freely. But recently some other doctors question this. They say that people who express anger repeatedly and violently become, in fact, more but not less angry. And this could cause medical problems. However, some doctors say that both repressing and expressing anger can be dangerous. They believe that those who express anger strongly may be more likely to develop heart diseases, and that those who keep their anger inside may face a greater danger of high blood pressure. Doctors say the solution is to learn how to deal with anger. The first step is to admit that you are angry and to recognize the real cause of the anger, and then to decide if the cause is serious enough to get angry about. If it is, do not express your anger while angry. Wait until your anger has cooled down, and express yourself calmly and reasonably. Doctors also say that a good way to deal with anger is to find humor in the situation that has made you angry, for laughter is much healthier than anger.Some doctors argue that people who often let the anger out would become __________.

① stronger

② more violent

③ angrier

④ more dangerous

查看完整题目与答案