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Participant
Participant
2,837 Views
Registered: ‎08-09-2013

HDMI GT reference clock.

Dear expert.

 

I'm designing the 4K HDMI (60Hz) with TX only.

I wll use the Video Phy Controller with HDMI 2.0 IP.

 

Video PHY Controller don't have the reference clock indicator. this have only the number of pixels per clock.

I guess that the clock is 297MHz(gt referecnce clock) . However, I guess that the pixel per clock is related to reference clock speed.

 

What speed we can give to gt refence clock with 1 or 2 pixel per **bleep**??   (example, 148.5Mhz or 297Mhz or 74.25MHz and so on)

 

There was no comment about the reference clock(GTH3) on the datasheet.

 

I will do not use the PLL for reference clock due to TX only. I guess that I don't need to use PLL with recovery clock method.

 

Thanks,

 

Sun

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Moderator
Moderator
2,739 Views
Registered: ‎11-09-2015

HI @sunkim,

 

Did you check the clocking section of the HDMI TX SS PG235? It contains the equations Pixel clock -> Video clock

 

Hope that helps,

 

Regards,

 

Florent


Florent
Product Application Engineer - Xilinx Technical Support EMEA
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Participant
Participant
2,722 Views
Registered: ‎08-09-2013

Thanks for your answer.

I solved this.

 

Sun

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Moderator
Moderator
2,717 Views
Registered: ‎11-09-2015

Hi @sunkim,

 

Could you close this thread marking it as solved?

 

Thanks,

 

Florent


Florent
Product Application Engineer - Xilinx Technical Support EMEA
**~ Don't forget to reply, give kudos, and accept as solution.~**
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