HX3 - data transfer speed

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Ivan_Lee
Level 5
Level 5
Distributor - Zenitron(GC)
100 replies posted 5 likes given 100 sign-ins

 

 


As we know, the HX3 supports four DS ports and sharing the same of 5Gbps bandwidth.

Customer would like to know if connecting 4 usb devices ( ex: mass storage devices ) to DS, 

each usb decive transfer data speed is 5Gbps / 4 = 1.25Gbps, correct cuz sharing 5Gbps bandwitdh.

Do you have any performance test document ?

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Ajeethkumar_P
Moderator
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50 likes received 500 replies posted 100 solutions authored

Hi Ivan Lee,

Thank you for posting in the Infineon Developer community!

We don't have documents regarding the HX3 performance test on the web. HX3 Performance is validated during our testing phase and is compliant with USB 3.0 5Gbps.

Theoretically, your calculation could be right to answer your question, but 5Gbps is not the effective data transfer rate. USB Host is responsible for allocating the bandwidth for every USB device connected to it. Also, there would be some class-based packet overheads as well. So, the effective data transfer rate would be lesser than 1.25Gbps when 4 MSC USB devices are connected to HX3.

Thanks,
Ajeeth

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Ajeethkumar_P
Moderator
Moderator
Moderator
50 likes received 500 replies posted 100 solutions authored

Hi Ivan Lee,

Thank you for posting in the Infineon Developer community!

We don't have documents regarding the HX3 performance test on the web. HX3 Performance is validated during our testing phase and is compliant with USB 3.0 5Gbps.

Theoretically, your calculation could be right to answer your question, but 5Gbps is not the effective data transfer rate. USB Host is responsible for allocating the bandwidth for every USB device connected to it. Also, there would be some class-based packet overheads as well. So, the effective data transfer rate would be lesser than 1.25Gbps when 4 MSC USB devices are connected to HX3.

Thanks,
Ajeeth

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