• 0
omikron

Zybo: HDMI clock frequencies allowed

Question

Hello,

When sending the picture over HDMI, how to choose the correct pixclk and serialclk?

I have the project, that sends the RGB data at 7MHz pixel frequecy, for example. V=50Hz, H=15625. 

Share this post


Link to post
Share on other sites

3 answers to this question

Recommended Posts

  • 0

Hi, In the HDMI specs the minimum resolution of 640x480 @ 60Hz, which has a pixel clock frequency is of about 25MHz (25.175 MHz IIRC) - see http://www.microprocessor.org/HDMISpecification13a.pdf

If your pixel clock is lower than this you will have to add a scan-line doubler, and send each pixel twice (to make each pixel into a 2x2 square).

 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now