Hello
We planned to use 6 port USB HUB in our design, because of limitation in connector pin availability we are planning few customization in design and have few concerns regarding the same as listed below
This is a complete custom design, In our interface connector we have only 4 pins left which can support USB3.0 signals and we do not have any pins left to provide USB2.0 signals,
We cannot change the connector to provide additional signals (Limitation)
In the upstream port we can provide only USB3.0 signals (Limitation)
HUB has to support both USB 3.0 and USB 2.0 devices in its downstream ports this is the requirement,
Our device can be interfaced with two different Host devices, one with USB 2.0 Support only and another with USB 3.0
Kindly refer the attached Block diagram
We need clarification
With only USB3.0 signals interfaced with USB HUB in upstream port can we access USB2.0 devices in the downstream ports,
We Plan to provide a High speed SPDT switch for 1 pair of signals "between USB 3.0 TX signal and USB2.0 signal", such that when needed we can select USB2.0 only or we can select USB3.0 only,
please let us know is our approach correct or any major concerns which needs to be taken care,
Regards
Nidhi P Shetty
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