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The 3.0USB port of the IMX8MM PCIE extension is not recognized

Question asked by Toby Toby on Jun 22, 2020
Latest reply on Jun 28, 2020 by Wigros Sun

Hello, I'm having some problems.When I used the IMX8MM chip, I extended two 3.0USB ports in the PCIE bus via a D720202 chip.But the two extended 3.0USB ports only ran at 2.0 speeds, and when I tested the pins with an oscilloscope, I found that the read/write data was running over a 2.0 circuit