用CPLD实现基于PC104总线的429接口板

Design 429 interface card based on PC104 bus using CPLD

根据429总线接口板的研究现状,提出了一种新的429接口板的研究方案,即基于PC104总线的两发四收429接口板。由于PC104板卡存在可利用空间小的特点,采用高集成度的复杂可编程逻辑器件CPLD实现与429总线的收发电路和与PC104总线之间的数据通信。CPLD的集成度高,可有效节省硬件资源,并且与专用集成电路相比,具有设计开发周期短、设计制造成本低、开发工具先进、测试简单和质量稳定等优点;与微处理器相比,具有处理速度快的优点,因此可以很好地提高该429接口板的性能。通过设计和实验该板卡可以正常稳定工作。

A kind of new 429 interface card based on PC 104 bus is put foruard according to the research situation of the 429 interface cards. Because of the finite available space on the PC104 card, it use high integrated degree, complex programmable logic device CPLD implement the data communication between 429 bus and PC104 bus. The integrated degree of CPLD may save high efficiently the space on card. And compare with ASIC, its designing and developing cycle is shorter, its cost is lower, its designing and developing tools are advanced, its test is simple, and its quality is stable. Compare with microprocessor, its processing rate is higher. So it can improve the performance of this 429 interface card. And the system can successfully run through the system＇s designing and its experiments.