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S5920是AMCC公司推出的一种PCI总线接口芯片。文章介绍了S5920的结构和特性 ,详细描述了其信箱和直通通道的工作机制以及外加总线信号的定义 ,给出了利用S5920直通通道实现并行数据接口扩展卡的设计实例
S5920 AMCC company introduced a PCI bus interface chip. This paper introduces the structure and characteristics of the S5920, describes the working mechanism of the mailbox and the through channel and the definition of the external bus signal in detail, and gives the design example of using the S5920 through channel to realize the parallel data interface expansion card