SN75DP149: output pin swap to DVI connector

Michael Johnson1

Part Number: SN75DP149

Hi,

Just doing some test layout work to check the pinout. I notice that the 75DP149 outputs are backwards with reference to the DVI connector. I am using this connector as I need to analog outputs as well.

Q1) The swap function on the DP149 only applies to the input pins correct, so no use to me here ?

Q2) I can get much better results if I swap lanes D0 and D2. Does the DP149 care about the content of each of the data lines?

This is what I'm looking at :

SOURCE D0 -> D2 DP149 D2 -> DVI D0

SOURCE D1 -> D1 DP149 D1 -> DVI D1

SOURCE D2 -> D0 DP149 D0 -> DVI D2

Ideally I would move the CLK channel as well, but I guess that's not possible. Any layout example for a DVI connector?

Thanks,

Mike

over 7 years ago

0 Francisco Javier Zamudio over 7 years ago

TI__Expert 5455 points

Hello Michale

1.- Yes, the swap function only applies to the input.

2.- Sorry but this is not possible, unfortunately the only change is between D2 and CLK . This layout is from other device but the lanes are like the DP149.

Regards

Francisco

0 Michael Johnson1 over 7 years ago in reply to Francisco Javier Zamudio

Prodigy 60 points

Thanks.

May I ask why I cannot swap D0 and D2 on both input and output? I can't see how the DP149 would be aware of the difference, the channel coding is identical on all 3. Does the part extract sync data from the stream - is it content aware?

Best,

MIke

0 Francisco Javier Zamudio over 7 years ago in reply to Michael Johnson1

TI__Expert 5455 points

Hello Michael

Sorry, I misunderstood. Yes, you can swap D0-D2 lanes, just make sure that this lanes will coincide from the input to the output.

Regards

Francisco

0 Michael Johnson1 over 7 years ago in reply to Francisco Javier Zamudio

Prodigy 60 points

Great thanks.

Interface

Interface forum

SN75DP149: output pin swap to DVI connector