PCI总线即外围部件互连总线,是一种先进的高性能32/64位地址数据复用局部总线,可同时支持多组外围设备,并且不受制于处理器,为中央处理器与高速外围设备提供一座沟通的桥梁,提高数据吞吐量(32位时最大可达132MB/s),是当今PC领域中流行的总线。但由于PCI总线协议的复杂性,其接口的实现比ISA等总线要困难得多。目前实现PCI接口一般采用专 The PCI bus, the Peripheral Component Interconnect Bus, is an advanced, high-performance, 32- / 64-bit address data multiplexed local bus that supports multiple peripherals at the same time and is unaffected by the processor for central processing units and high-speed peripherals Providing a bridge to communicate and increase data throughput (up to 132MB / s in 32bit) is the bus that is popular in today’s PC world. However, due to the complexity of the PCI bus protocol, its interface is much more difficult to implement than an ISA bus. PCI interface is generally used to achieve the general