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I have designed a board with cyusb3304-68ltxc,the downstream port connenct two cameras.
when the power is on,the two cameras are USB2.0 devices,next time the two
cameras maybe recgonized USB3.0 devices.
Solved! Go to Solution.
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Hello,
Please check with any other 3.0 device connected on the same downstream port which consumes less power such as a pen drive and let us now if the issue is still the same.
Best Regards,
Sananya
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the hub is all recgonized a super speed hub.
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Hello,
Could you please attach your schematic? You may send it over the private message option as well if it is confidential.
Best Regards,
Sananya
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Hello,
-Could you test when the lines are routed to the downstream connectors without the TVS array? Are the cameras connected via cables to the connectors?
-Please add a capacitor of minimum 120 uF on VBUS of downstream connectors to maintain stable voltage.
-Please add decoupling and bulk capacitors as per Table 4 in the App Note http://www.cypress.com/file/140751/download.
Best Regards,
Sananya
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I've tried to drop TVS array and increase bulk capacitor,but it does not make it any better.
When the temperature goes down to abount 10℃, the phenomenon becomes obvious.
Every time,when i disable the superspeed hud on the PC,then enbale the superspeed hub,
the two cameras will become to USB3.0 devices.
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Hello,
Please check with any other 3.0 device connected on the same downstream port which consumes less power such as a pen drive and let us now if the issue is still the same.
Best Regards,
Sananya