EM4-204-DX1
EM4-204-DX1
EM4-204-DX1
2 串行通讯简介
计算机通讯即是不同的设备通过线路互相交换编码数据，其主要目的在于将数据从某端传送到另一端，实现信息的交换。通讯通常有并行和串行两种方式，由于并行传输方式在数据电压传送的过程中容易衰减互扰，并且线路工程费用较高，而串行通讯方式则能很好的解决这些问题，因此在工业应用中绝大多数使用串行通讯。
串行通讯的基本接口方式分为RS-232和RS-485两种标准。
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