TFP410 No output signal issue

Mickey Zhang

Genius 12080 points

Other Parts Discussed in Thread: TFP410

Hi Team,

The customer is using TFP410. The attachment is his schematic. The input signals of TFP410 is provided for FPGA. But there is not any output signal in his circuit
even if PD is connected to VDD. VDD is 3.3V.

What is the reason? How to solve the issue?

Thanks,

Best Regards,

over 7 years ago

0 Mickey Zhang over 7 years ago

TI__Genius 12080 points

Can anyone see my issues?

0 Elias Villegas M. over 7 years ago in reply to Mickey Zhang

TI__Guru* 76130 points

Hello,
PD# must be tied high.
What is the voltage level of the inputs?
Are you connecting a video sink? The TMDS drivers must sense a 100ohm differential termination, it is a current-mode interface.
Regards

0 Mickey Zhang over 7 years ago in reply to Elias Villegas M.

TI__Genius 12080 points

Hi Elias,
1. The PD pin has been connected to VDD. But there is still not any output signal in his circuit. I will query the customer the voltage level of the inputs.

2. Yes, TFP410 has been connected the monitor. "The TMDS drivers must sense a 100ohm differential termination," what is your mean?
Where can be 100ohm resistances put? TX0+/- , TX1+/-, TX2+/- and TXC+/-?

0 Elias Villegas M. over 7 years ago in reply to Mickey Zhang

TI__Guru* 76130 points

Hello,
A DVI sink will have the terminations internally.
What is the frequency on ODCK?
Regards

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TFP410 No output signal issue