P-PCI-LV in Figure is a PCI interface for sending and receiving 32-bit data via a half duplex point-point LVDS link with 96-contact half-pitch connector and the cable[4,5,6].
The interface contains a ALTERA Programmable Logic Device (PLD)[7], which handles PCI bus and an external bus. It also includes FIFO[8] to store data temporarily between the PCI bus and the external bus. The protocol of the external bus is simple. It is a synchronous bus strobed by a clock signal.