一、I/O接口概述 二、定时/计数器——8253 三、并行接口——8255A 四、串行接口——8251A

8-1 LED 显示器接口 8-2 键盘与单片机接口 8-3 D/A转换器接口 8-4 A/D转换器接口

• 串行通信的基本概念 • 可编程串行I/O接口8251A • 8251A应用举例

International Trade What determines whether a country imports or exports a good?

Economy. . . . . . The word economy comes from a Greek word for “one who manages a household

8.1 Some Basics 273 quence in the cells DNA. A segment of a DNA molecule 8.2 Nucleic Acid Structure 275 that contains the information required for the synthesis 8.3 Nucleic Acid Chemistry 291 8.4 Other Functions of Nucleotides 300 the only known func- Watson

9.1A/D转换器接口 9.2D/A转换器接口

一、串行通信的基本概念 二、可编程串行接口芯片8251A 三、EIA RS--232C串行口 四、8251A的应用

一、典型例题 例1.计算a-x2dx(a>0) 解:设x=asint,则dx x=acostdt,且

• Implementation of a simple allocator • Explicit Free List • Segregated Free List • Suggested reading