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Visitor daihaohuazhu
Visitor
411 Views
Registered: ‎07-16-2018

Does GTH QPLL support 3.125Gpbs, 5Gbps line rate?

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Does QPLL support 3.125Gpbs, 5Gbps lane rate?

My Project needs to support line rate change dynamicly. However, 3 types of lane rate are indeed: 3.125Gbps, 5Gpbs, 10Gpbs.

ug476 said GTH QPLL only supports lane rate >8Gbps. Can I use it in 3.125Gbps anyway? What problem will occur? QPLL unlock?

Thank you!

未命名1547630307.png

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1 Solution

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Xilinx Employee
Xilinx Employee
378 Views
Registered: ‎10-19-2011

Re: Does GTH QPLL support 3.125Gpbs, 5Gbps line rate?

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Hi @daihaohuazhu,

your picture shows the frequency range of the QPLL. This is not the usable line rate range. There are additional output divider which extend this.
Please have a look at ds183, table 70. Here you can find the supported line rates for the used output divider settings.

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2 Replies
Xilinx Employee
Xilinx Employee
379 Views
Registered: ‎10-19-2011

Re: Does GTH QPLL support 3.125Gpbs, 5Gbps line rate?

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Hi @daihaohuazhu,

your picture shows the frequency range of the QPLL. This is not the usable line rate range. There are additional output divider which extend this.
Please have a look at ds183, table 70. Here you can find the supported line rates for the used output divider settings.

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Visitor daihaohuazhu
Visitor
344 Views
Registered: ‎07-16-2018

Re: Does GTH QPLL support 3.125Gpbs, 5Gbps line rate?

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Thank you very much!!

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