9054 datasheet中的一句话。

The PCI 9054 always de-asserts REQ# for a
minimum of two PCI clocks between Bus Master
ownership that includes a Target disconnect.

includes a Target disconnect什么意思，请结合pci给以试训。
tia。

to Jerf.cat: (Why so many cats here?)
   我手头没有PCI的资料，但我原来看过，Jerf.Cat，Could u have some interest in  giving  me a brief description of Target Discoonect Clock, for u see, maybe i would find my lost memory.

thanks in advance and why choose some COOL names such as Jerf.Garfield.