Serial data communication has gained wide application in network transmission, backplane transceiver and I/O interface.
串行数据通信在网络传输、背板连接和I/O接口等领域应用非常广泛。
This paper introduces an extended serial communication technique using 89C2051. It can provide I/O FIFO of high capacity. Data are pretreated before transmission.
介绍了一种用单片机（89C2051）实现的异步串口扩展技术，这种方法成本低，可以提供大容量的输入输出FIFO，而且对传输的数据有预处理能力。
The data are loaded through simulating serial data transmission by I/O interface.
热敏打印头采用I/O口模拟串行数据传输实现数据加载。
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