PCI bus, PCI controller(card or integrated on motherboard), the difference?

[hfss_newbie]

Hi guys,

I don't know the difference between these 4 terms. infact,I know what PCI card and PCI slots are, but I don't understand where the PCI bus is.
if i considering these two cases that:

1-PCI controller is a PCI CARD (so not integrated)

2-PCI controller is INTEGRATED in Motherboard



The PCI bus, is it the "traces" on the "Motherboard" in both cases?

or in case 1 that we have a PCI controller card,Is the interconnection between a PCI card and a PCI slot called PCI bus (so this bus is not on the motherboard anymore)?


Thanks for your clarifications

 

[SHABU]

PCI uses buses as pathways that connect peripheral devices like the keyboard, mouse, monitor and printer to the motherboard.PCI serial controllers use the PCI bus to provide a data path between the central processing unit and an external device. Although serial ports work at low speeds, they can be useful for connecting older devices to a motherboard.

 

[hfss_newbie]

Thanks SHABU,
so the PCI bus traces are the traces on the motherboard in both cases. isn't it?