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What happens if the DDC4100 is accidentally reprogrammed?

The DLP Discovery 4100 Starter Kit Technical Reference Manual says, "The DDC4100 or its PROM should not be programmed!"

I've been trying to learn how to set up a PROM file for the APPSFPGA chip (so the program loads when the circuit is powered), and I think I may have reprogrammed the DDC4100 chip in the process.  When I do the boundary scan in iMPACT, two chips are shown, and I believe the left one is the DDC4100 chip.  (Before, I thought it was where I was supposed to store the PROM file.)  I programmed it with an MCS file I configured based on my VHDL code.  What would happen if I did overwrite the DDC4100 chip?  How can I fix it?

When I try to do a blank check or program the Flash file for the APPSFPGA chip, it says, "Failed to query common flash interface."  Might this be happening as a result of overwriting the DDC4100 chip?

  • Hi Anna,

    Sorry for a delayed response. The D4100 kit requires hardware modifications on the board (populating a couple of resistors) to program the DDC4100 controller. By default, you do not have access to the DDC4100 PROM.

    I suspect that you have flashed APPSFPGA with a wrong file. Please request the .mcs file for APPSFPGA from the design house that you have purchased the kit from.

    Regards,

    Divya