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Testing results of PXL RDO board JTAG daisy chain

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Testing results of PXL RDO board JTAG daisy chain. Initial design. Digilent USB - JTAG. Fiber USB. Fiber USB. 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:.

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Presentation Transcript
slide1

Testing results of PXL RDO board JTAG daisy chain

Initial design

Digilent

USB - JTAG

Fiber

USB

Fiber

USB

PC

RDO

board

Schematic for Digilent USB-JTAG module PCB

slide3

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

slide4

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

slide5

Successful 10 RDO board JTAG daisy-chain using Xilinx USB programming module and PXL JTAG chain cable.

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