慕课嵌入式开发及应用(第三章.GPIO应用-LED)

川长思鸟来 2023-07-15 09:14 9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.GPIO应用-LED ###

*  0 目录
 *  3 基本模块
 *   *  3.5 GPIO应用-LED
     *   *  3.5.1 课堂重点
         *  3.5.2 测试与作业
 *  4 下一章

# 0 目录 #

# 3 基本模块 #

## 3.5 GPIO应用-LED ##

### 3.5.1 课堂重点 ###

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### 3.5.2 测试与作业 ###

> 关于8段数码管，下面说法正确的是（ ）  
> A.8段数码管只能显示数字  
> B.8段数码管某一段要发光的话，该段所接MCU引脚必须为高电平  
> C.一只8段数码管只能一段一段单独发光，利用视觉暂留效应显示数字  
> D.实际应用中多个8段数码管同一时刻可以只有一个数码管发光，利用视觉暂留效应显示数字  
> 正确答案：D

> 1五连排共阴极8段数码管共有（ ）根线需要连接到MCU  
> A.40B.13C.12D.11  
> 正确答案：B

> 2实际应用中，有8个8段数码管，就必须由64根数据线来控制数码管的亮暗  
> A.B.  
> 正确答案：B

> 3n连排数码管也称动态扫描数码管，我们看到整排数码管同时显示数字是由于（ ）造成的现象  
> 正确答案：视觉暂留

# 4 下一章 #

**博客地址:**

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