4.3 PCI Card - The PCI card is the interface between the PCI bus on the processor card
and the acquisition system. It has the following interfaces:
– PCI card acts as a transaction repeater
– LVDS link between PCI card and Acquisition system
– PCI card also contains buzzer and unique chip ID.
– All digital functions (PCI and LVDS interface) contained in a Xilinx Spartan
IIe
– Two Beeps at powerup indicates link is good
– PCI card can also be detected with device manager
4.4 USB Hub – The USB Hub is a 1 to 4 USB 1.1 Interface. Only three USB are actually
created however the HUB interface chip is capable of making four USB ports. One
of the ports connects to the Touch Screen Controller, one port is available for an
internal graphics printer and the third port is for the front panel processor. The USB
Hub is recognized by Windows as a Generic USB Hub.
Figure 4-2 Device Manager
Theory of Operation 4-3
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