Hello.
I confirmed the USB differential transmission.
It is NG by the eye pattern test.
Common mode filter(DLP11SN900HL2L) is mounted between the USB connector and Davinci(DM8168).
I Was found comments was OK by changing the reference resistor in E2E community.
I also experimented with 33Ω and 22Ω.
There were improvements in some extent, but the test is not a OK.
USB differential transmission also take measures 90Ω.
I feel drive capability of Davinci(DM8168) is weak.
Do you know the register that you can adjust the drive capability of USB?
In addition, Davinci(DM8168) would have been approved as a USB host device ？
Regards,
-okamoto