本文介绍了一种智能输入/输出接口电路,它的一个基本特征是:作为输入/输出接口电路应用时,不须要方向控制信号线来控制其输入或输出的方向,即:当用户需要输出驱动控制信号,它就会自动地把输出驱动信号传送到控制目标或对象,当用户需要阅读测试对象的输出信号的状态,它就会自动地把结果发送给请求者;另一个基本特征是:它可以传输大电流驱动信号,可以承受高电压和宽动态范围的被检测状态信号。 In this paper, an intelligent input / output interface circuit is introduced. One of its basic features is that it does not need directional control signal lines to control the direction of its input or output when it is used as an input / output interface circuit. That is, when the user needs an output driver Control signal, it will automatically send the output drive signal to the control target or object, and when the user needs to read the state of the output signal of the test object, it will automatically send the result to the requester. Another basic feature is that it Can transmit high-current drive signal, can withstand high voltage and wide dynamic range of the detected status signal.