Other Parts Discussed in Thread: TPS65987
My customer has one Android USB host which support USB3 Gen1(5G/s).
On their board there is one Type-C connector which uses HD3SS460 and TPS65987.
When connecting the host to the device their log showed that USB speed start at USB3 Gen1 then drop to USB2 only after about 10~20 seconds.
We check Vcm spec of Android host, its Vcm is from 0 to 2.2V, but HD3SS460 has only from 0 to 2V. Is it the possible root cause that make the speed drop?
From USB3 spec, Vcm is from 0 to 2.2V also, so I would like to know doesn't HD3SS460 follow the spec?
My customer is trying to follow the suggest placement on the EVM user guide.
Please help to clarify the issue and provide your advice.