TDP1204: DP++ dual mode

Tim Chen

Prodigy 10 points

Part Number: TDP1204

Tool/software:

In TDP1204 datasheet, we need to add 499ohm on DP signal in HDMI AC-coupled mode.

But in our another chip(not TI), it call this as DC Restoration circuit and seems it need for DC mode not AC mode.

I’m confused…

5 months ago

0 David (ASIC) Liu 5 months ago

TI__Guru**** 176811 points

Hi,

I believe the two serve the same purpose and it is a typo in the other vendor's documentation. If you look at the text, you can see

So it is for AC coupled source.

Thanks

David

0 Tim Chen 5 months ago in reply to David (ASIC) Liu

Prodigy 10 points

Yes, i think both should be same purpose but it also said The DC restoration circuit is suitable for designers not wishing to implement the newly introduced AC coupled sources implementation added to HDMI Specification version 2.1b.

And explain in TMDS, so it should be DC source not AC. that's why I confused...

0 David (ASIC) Liu 5 months ago in reply to Tim Chen

TI__Guru**** 176811 points

Hi,

I believe this is a typo, you may need to double check this with that particular IC vendor.

Thanks

David

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TDP1204: DP++ dual mode