本文介绍了可编程逻辑器件的发展现状及其在接口电路地址译码中的应用 ,在基于PC机的多轴步进电机控制卡设计中用GAL2 2V10实现了在接口电路中设置地址、控制总线缓冲和隔离以保护计算机的功能。从使用效果看 ,不仅减小了系统体积 ,简化了系统设计 ,而且减少了级延迟 ,提高了系统处理速度 ,有助于保证控制卡的实时性要求 This article describes the development of programmable logic devices and its application in the decoding of the interface circuit address in PC-based multi-axis stepper motor control card design with GAL2 2V10 achieved in the interface circuit to set the address, the control bus Buffer and isolate to protect the computer’s functionality. From the use of view, not only reduces the size of the system to simplify the system design, and reduce the level of delay and improve the system processing speed, help to ensure the real-time control card requirements