Hi
please request my customer's circuit reviews.
he is using HD3SS6126 as usb 3.0 switch.
but it detected as usb 2.0.
Please see the attached file.
thanks.
regards,
robin.
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Hi
please request my customer's circuit reviews.
he is using HD3SS6126 as usb 3.0 switch.
but it detected as usb 2.0.
Please see the attached file.
thanks.
regards,
robin.
schematic looks ok, how about board layout?
Thanks
I will return after ask my customer layout.
Anything else to check?
regards,
robin
Hi I'm the customer of that circuit.
It is fine to use USB -A type for upport?
because i used USB-B type to upport then it was detected SupperSpeed USB.
normally host or down port is type-a, hub or device is type-B, what is your application?
Hi Brian.
my customer will reply.
I will tell him to update.
please wait for reply.
thanks.
Our Application is Camera Hub Application.
We Use WaterProof Cable So It could be only A type
Hi Brian.
I have 3 Question for this Situation
1. Can we know off resistance of the HD3SS6126?
2. Is there any difference between HS_OE pin High and Low?(In SuperSpeed Line)
3. Above Picture We use two HD3SS6126 and use Parallel pattern at SuperSpeed Line In this Situation. How can we Impedence matching in the board?
1: when switch off, resistance should be Mohm.
2: when HS_OE high, device is off. So superspeed is off too.
3: for impedance match, you need to keep trace width same.
also for super speed trace, keep vias as less as possible. you have twos vias at least.
Hi Brain
Thank you for answer that question.
I have more question about Impedance matching.
In our device use two HD3SS6126 when number one HD3SS6126 Switch On Upport line connect Connector to channel 1 other Conneter Channel 1 line is off becuase numer two HD3SS6126 Switch is off(Refer to Circuit Diagram)
We used the impedance matching board to make it 90 ohms.
However, 90 ohms matching is 90 ohms between lines, not 90 ohms considering the chips between liness.
you may confused by impedance and resistance. impedance is more AC, it's L/C related, resistance is DC, R=V/I.
you don't need to match device impedance.
What you're saying is that differential lines are AC so we don't need care about HD3SS6126 off resistance?
Then What's the Problem of my circuit?
And the Parallel Line doesn't make problem of the usb 3.0 speed?
one more question, how do you split signal from connector 1 or connector 2 to both 6126?
I see, you can not split high speed signal like this. it will cause lots of reflection
1.Why It caused reflection?
2.So what should I do if I want to use the signal in both directions?