The ScanPCI-280 module uses the JTAG interface built into the PCI bus to access the boundary-scan components of the PCI-based unit under test (UUT) and fully supports 3.3V- and 5V-compatible PCI cards. During the test, the PCI card UUT edge connector plugs into the ScanPCI-280 module mating connector allowing access to the boundary-scan-controllable digital I/O pins provided by the ScanIO-280LV companion product. The ScanIO-280LV I/O pins are controlled through the serial boundary-scan bus and test patterns can be applied to these pins. There are no limitations on test pattern depth since the module requires no pin memory. CORELIS INC., Cerritos, CA. (562) 926-6727.