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Original question:

TFP410: Conversion

TFP410: DVI Specifications

TI-CSC
Genius 13065 points
Part Number: TFP410
Other Parts Discussed in Thread: TFP403

Tool/software:

Hello E2E Experts,

Good day.

In reference to the abovementioned E2E post,  our clock frequency is going to be significantly lower then 25MHz. It’s at 7,7MHz.--which is unfortunate.

However that leaves me with another question.

 So from my understanding the TFP410 will not be able to produce a DVI compliant signal if it is fed a clock frequency that low.

Will the chip still produce a signal that is just not compliant with the DVI specs though? Meaning with a clock that is below specification or is it going to produce no signal at all?

Additionally, I have found a similar question regarding the TFP403:

What if input pixel clock frequency is less than 25MHz for TFP403?

I guess these chips have some margin. I might be able to tweak the receiving end to accept a non DVI compliant signal.

Regards,

TI-CSC

  • 0
    TI__Mastermind 40110 points

    Hey,

    The TFP410 is a serializer chip and the TFP403 is a de-serializer chip, so the reaction to an out of spec signal will be different.

    TI-CSC said:
    Meaning with a clock that is below specification or is it going to produce no signal at all?

    I'm not sure what will be outputted with a frequency that is below 22.5MHz, as this is considered inactive as per DVI spec.

    I recommend staying within the bounds of the chip, or  finding a suitable alternative as we cannot guarantee performance in an out of spec range.