慕课嵌入式开发及应用(第三章.脉宽调制.输入捕捉.输出比较))

爱被打了一巴掌 2023-07-13 12:28 96阅读 0赞

### 慕课苏州大学.嵌入式开发及应用.第三章.基本模块.脉宽调制.输入捕捉.输出比较 ###

*  0 目录
 *  3 基本模块
 *   *  3.2 脉宽调制.输入捕捉.输出比较)
     *   *  3.2.1 课堂重点
         *  3.2.2 测试与作业
 *  4 下一章

# 0 目录 #

# 3 基本模块 #

## 3.2 脉宽调制.输入捕捉.输出比较) ##

### 3.2.1 课堂重点 ###

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### 3.2.2 测试与作业 ###

> 关于脉宽调制的技术指标，下面说法正确的是（ ）  
> A.PWM信号的周期一定是时钟周期的整数倍  
> B.PWM占空比可以从0%~100%任意调整  
> C.PWM极性决定了占空比是高电平与PWM周期之比还是低电平与PWM周期之比  
> D.PWM分辨率在确定的时钟频率下也可自由调整  
> 正确答案：A

> 1脉宽调制的分辨率取决于（ ）  
> A.MCU的内核时钟频率  
> B.MCU的外部时钟频率  
> C.定时器选用的时钟频率  
> D.MCU内核时钟频率和MCU外部时钟频率  
> 正确答案：C你选对了

> 2脉宽调制的主要技术指标包括（ ）  
> A.占空比B.对齐方式C.极性D.时钟源  
> 正确答案：A、B、C

> 3一般情况下，MCU实现的PWM波的脉冲宽度的增加与减少可以连续变化。  
> A.B.  
> 正确答案：B

> 4假设定时器的频率是48MHz，实现2μs的高电平持续时间需要的时钟周期个数是（ ）  
> 正确答案：96

# 4 下一章 #

**博客地址:**

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