测试系统的实时性和快速性对主控机与VXI模块之间的响应速度提出了严格的要求。在阐述和分析VXI系统中断机制原理的基础上,论述了利用可编程逻辑器件及VHDL语言实现VXI接口和中断电路的方法。并同时给出了利用VISA实现中断应用程序的设计方法。软硬件的实践使用表明,该设计有很好的实时响应性能。 The real-time and rapidness of the test system places strict requirements on the response speed between the host computer and the VXI module. On the basis of expatiating and analyzing the principle of interrupt mechanism of VXI system, the method of realizing VXI interface and interrupt circuit by using programmable logic device and VHDL language is expounded. And at the same time gives the use of VISA interrupt application design method. The practical use of hardware and software shows that the design has good real-time response performance.