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TI HD3SS6126 application issue

Other Parts Discussed in Thread: HD3SS6126

Hi Team
     I have use HD3SS6126 USB3.0 switch in our system.
     We have 2 host connect to HD3SS6126 input and USB flash driver connect to HD3SS6126 output.

     I Setting switch to Host A (by HW) and power up system , The host A can be find Flash driver.
     I Setting switch to Host B (by HW) and power up system , The host B can be find Flash driver.

     BTW

     When I boost our system ( Host A cna finde device ) and use GPIO pin to change Host A to Host B.
     The device can not be find. we need hot plug device again , Device can be find in host B.

     How did we fixed this issue on our system? Did we must discharge Vbus ( 5V to 0V to 5V )?