文章介绍了一种分组循环优先仲裁算法,该算法具有现实公平性特点。文章论述了分组循环优先仲裁算法在PCI总线仲裁中的应用,并给出了分组循环仲裁算法的实现,其实现体现了ASIC模块化设计思想,具有很好的可扩展性。由于采用二叉树并行筛选,该实现方法能很快的得到仲裁结果。 This paper introduces a packet cycle priority arbitration algorithm, the algorithm has the characteristics of the reality of fairness. This paper discusses the application of packet cycle prioritized arbitration algorithm in PCI bus arbitration and gives the realization of packet cycle arbitration algorithm. The realization of this algorithm embodies ASIC modular design idea and has good expansibility. Due to the binary tree parallel filtering, the implementation method can quickly get the arbitration result.