Is the data transfer done atleast parially or is no data transferred at all? Did you check the data lines?
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Thank you for your reply. I think I figured out the problem. I have reduced the buffer count(the DMA channel used for configuring FPGA) from 16 to 8, then USB 3.0 port can also configure FPGA successfully. May I know if the firmware attached to AN84868 is written for FX3 with 256KB RAM size?