并行口EPP模式的应用

Application of Parallel Ports in EPP Mode

简要介绍了并行口常见的几种工作模式和并行口EPP协议的输入输出时序特性,说明了并行口EPP模式所使用的寄存器及端口地址;分析了并行口EPP模式的应用场合;给出在并行口EPP模式下进行高速双向数据传输的一个电路实例和主要的通信程序片断.

Some familiar modes of parallel ports and the inputoutput timing characteristics of EPP protocol were described.The registers used in EPP mode of parallel ports and the addresses of ports were also described.The situation in which the EPP mode of parallel ports is used was analysed.The schematic circuit diagram in EPP mode of parallel ports for high speed and bidirectional data transfers and a paragraph of communication programs were given.