摘要
对目前常用的串行通信方式进行了分析，并重点分析了ＳＩＯ串行接口芯片是如何满异步通信协定而进行的初始化工作，实例中给出了键盘和ＴＰ－８０１Ａ、ＣＲＴ和ＴＰ－８０１Ａ之间数据传送的全过程．
This paper discusses commonly use serial data transmission at the moment, and mainly analysises the initial process of SIO serial interfaces chip how meets the demands of asynchronous communication. The data transmission in full process between keyboard and TP-801 A, CRT and TP-801 A is given in the exmples.
