Below is the ODCK output from TFP401A. What is wrong with the pixel clock here? The clock signal is not proper from TFP. Tried 1280x720 as well as 1024x600 resolutions. Also attached the schematic.
-Thanks
Mahen
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Hello Elias,
Thank you for quick response.
Since input resolution is 1280x720 @ 60Hz, pixel clock must be 1280 * 720 * 60 = approx 55MHz. But from the oscilloscope measurement I see it varying from 2MHz to 50MHz. When it showed 50Mhz briefly the waveform looks OK. If you see the video frame by frame you will notice. Its Hantek 200MHz oscilloscope.
If I connect ODCK from TFP401A evaluation board from adafruit the clock is perfect. With the same oscilloscope setup if we connect our board the clock is bad. changed the TFP401 IC as well. HDMI source tested was from PC and laptop with 1280x720 60hz resolution with audio output disabled; only hdmi video.
Appreciate your support.
-mahen