PCI总线传输的终止方式探析:探讨了PCI 总线传输的终止方式。PCI 总线的主设备和目标设备都可以终止PCI 传输。主设备和目标设备在终止一次传输的同时还以信号的电平组合告知主设备其不同的终止状态。主设备启动的终止有正常终止和主设备失败终止;目标设备启动的终止有重试、解除连接和目标设备失败。关键词:PCI 总线;传输终止方式;主设备;目标设备Abstract :This paper discusses the termination mode of PCI bus transaction relatively across - the -board1 Either the master or the target may initiate termination of a PCI transaction1The master and the target terminate the transaction and signal different termination condition by combining different signals at the same time1The two types of master initiated termination is normal termination and Master - Abort termination1The three types of target initiated termination are retry ,disconnect and Target - abort.Key words :PCI bus ;termination mode of transaction ;the master ;the target