Testing results of PXL RDO board JTAG daisy chain Initial design Fiber USB Fiber USB Digilent USB - JTAG PC RDO board Schematic for Digilent USB-JTAG module PCB
Schematic for the PXL RDO Board JTAG daisy-chain cable
Initial testing with Digilent board: This is the first opportunity to test the full compliment of 10 RDO boards. Initial tests with the Digilent JTAG board to individual RDO boards have been and continue to be successful. Tested at different JTAG frequencies from default (6MHz) to lowest using ISE Impact 14.5 Tested for 4, 6, 8, 10 boards (using board bypass switches on the JTAG cable) All tests failed – errors were Wrong number of devices found Devices not recognized Only some devices recognized PXL JTAG Daisy-chain cable Digilent USB-JTAG board
Since the Digilent module based design did not work for multiple boards, we tried the standard Xilinx programmer. All RDO boards correctly recognized. Configuration of individual boards successful in positions 5 and 10. Flash configuration not tested. Xilinx USB-JTAG programmer
Successful 10 RDO board JTAG daisy-chain using Xilinx USB programming module and PXL JTAG chain cable.