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Adventurer
Adventurer
1,295 Views
Registered: ‎10-11-2017

GTX transceiver:DRP clock

Hello everyone!

I am using 7 series GTX Ttransceiver.I have a question:

Is DRP clock must be provided?

can DRP_CLK_IN_P/N left floating(no connection)?

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6 Replies
Observer t_noguchi
Observer
1,247 Views
Registered: ‎03-05-2018

Re: GTX transceiver:DRP clock

Hello.
7 series GTX can operate without connecting DRPCLK.
However, in the example design of the transceiver wizard, the external input DRP_CLK is also used for sysclk and so on.
Therefore, DRP_CLK_IN_P / N may not be able to float.

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Adventurer
Adventurer
1,238 Views
Registered: ‎10-11-2017

Re: GTX transceiver:DRP clock

@t_noguchi

hi,Do you mean that I must use DRP clock if I use the transceiver wizard?

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Observer t_noguchi
Observer
1,234 Views
Registered: ‎03-05-2018

Re: GTX transceiver:DRP clock

> hi,Do you mean that I must use DRP clock if I use the transceiver wizard?

Yes. A local clock (DRP clock) is necessary for startup FSM and others.

Observer t_noguchi
Observer
1,232 Views
Registered: ‎03-05-2018

Re: GTX transceiver:DRP clock

It indicates that the external input DRP_CLK is used other than the GTX DRP clock.

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Adventurer
Adventurer
1,223 Views
Registered: ‎10-11-2017

Re: GTX transceiver:DRP clock

@t_noguchi

I don't have more differential clock for DRP,Can I provide a single-ended clock directly to sysclk?

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Moderator
Moderator
1,217 Views
Registered: ‎07-30-2007

Re: GTX transceiver:DRP clock

Yes,  The system clock input can be changed to single ended but it must still go through the BUFG. 

Roy


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