TX2 and TXC changed

kent lin

Prodigy 20 points

Other Parts Discussed in Thread: TFP410

Hi ,

I am using the TFP410...

I check TMDS output signals using a oscilloscope and found that the TXC and TX2 are changed.

I don't know why? Is that possible?

Best Regards,

Kent

over 15 years ago

0 DHarmon over 15 years ago

TI__Genius 16430 points

Kent,

Sorry for the delay, this really is confusing and we are not sure how you are seeing what you are seeing...

If we could review your schematic it would be very helpful. You could either post it to the forum, or if you are uncomfortable doing that, please send it to cis_apps_support@list.ti.com and our apps team will review.

0 Nakamura Toru over 14 years ago

Prodigy 10 points

Hello,

I have had same phenomenon.

TX2+/- signals did not reflect DE level but TXC+/- signals reflected DE signals.

I think this phenomenon seems to be caused by the NC (pin49) level.

In my circuit, this NC pin was connected to FPGA and this was not programed (I think this was 'weak pull up').

After I programed this pin to 'H', this phenomenon was disappeared.

Regards,

T.Nakamura

0 kent lin over 14 years ago in reply to Nakamura Toru

Prodigy 20 points

Hi Nakamura-san,

Thanks a lot...

Best Regards,

Kent

Interface

Interface forum

TX2 and TXC changed