通讯方式和通讯协议介绍VIP免费

目录 一、RS232的串口通讯 ............................................................................. 2 应用 ......................................................................................... 2 工作方式 ..................................................................................... 2 接口标准 ..................................................................................... 2 电路组成 ..................................................................................... 3 概述 ..................................................................................... 3 简介 ..................................................................................... 3 二、RS485串行通讯 ............................................................................... 3 简介 ......................................................................................... 3 接口 ......................................................................................... 4 电缆 ......................................................................................... 4 布网 ......................................................................................... 5 区别 ......................................................................................... 5 三、串行通信 ..................................................................................... 6 概念 ......................................................................................... 6 分类 ......................................................................................... 7 同步通信 ................................................................................. 7 异步通信 ................................................................................. 7 特点 ......................................................................................... 7 形式和标准 ................................................................................... ...