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Visitor farhad_nv
Visitor
10,215 Views
Registered: ‎01-06-2015

Does Kintex Ultrascale support LVDS at 3.125Gbps?

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Hi,

I am trying to find answer to this question, but as far as I can see, there is no such information available at the moment, and I am guessing  that the maximum datarate supported by the Kintex Ultra Scale is about the same as the maximium dataret of the DDR memory which is about 2133 for a -1 device (from the Table 23 of the datahsset Nov 14. 2014).

 

I don't want to use the GTX  transceivers for this (I need to interface to 32 I/Os).

 

Thanks in advance for your help.

 

 

 

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Xilinx Employee
Xilinx Employee
17,998 Views
Registered: ‎07-31-2012

Re: Does Kintex Ultrascale support LVDS at 3.125Gbps?

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Hi,

 

the data given for the DDR3 is for the memory interfacing with the DDR and not the normal user IO applications. For normal application at such speeds of 3.125, you need to use the GT's and there is no other option. The normal SERDES is not expected to work at such speeds even after the values are updated in table 22.

Thanks,
Anirudh

PS: Please MARK this as an answer in case it helped resolve your query.Give kudos in case the post guided you to a solution.
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Xilinx Employee
Xilinx Employee
10,212 Views
Registered: ‎01-03-2008

Re: Does Kintex Ultrascale support LVDS at 3.125Gbps?

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If you want to have data at 3.125 Gbps then you need to use the GTX, this is not possible with the regular I/O.

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Visitor farhad_nv
Visitor
10,196 Views
Registered: ‎01-06-2015

Re: Does Kintex Ultrascale support LVDS at 3.125Gbps?

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Well that is what I was afraid of, I wonder what is the maximum differential speed that Kintex UltraScale -1 supports? Is there a way I can find that information? 

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Xilinx Employee
Xilinx Employee
10,189 Views
Registered: ‎01-03-2008

Re: Does Kintex Ultrascale support LVDS at 3.125Gbps?

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The numbers will be published in Table 22 of the Kintex UltraScale data sheet shortly and should be 1.25 Gbps for the -1 speed grade. 

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Xilinx Employee
Xilinx Employee
17,999 Views
Registered: ‎07-31-2012

Re: Does Kintex Ultrascale support LVDS at 3.125Gbps?

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Hi,

 

the data given for the DDR3 is for the memory interfacing with the DDR and not the normal user IO applications. For normal application at such speeds of 3.125, you need to use the GT's and there is no other option. The normal SERDES is not expected to work at such speeds even after the values are updated in table 22.

Thanks,
Anirudh

PS: Please MARK this as an answer in case it helped resolve your query.Give kudos in case the post guided you to a solution.
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Visitor fabdolian
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10,144 Views
Registered: ‎01-30-2009

Re: Does Kintex Ultrascale support LVDS at 3.125Gbps?

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Thank you very much, I will mark it as answered. 

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