SN65DSI86: The signal AUX is not working,How are the registers for AUX configured,Apply to different screens

Neal Zhu

Expert 2470 points

Part Number: SN65DSI86

Now there are two screens connected with SN65DSI86, A can light up the screen, B can not light up the screen,

The detection found that the signal AUX was not connected, what could be the reason?

In addition, how to configure the AUX registers?

Thanks!

A Screen Datasheet.pdf

B Screen Datasheet.pdf

over 4 years ago

0 David (ASIC) Liu over 4 years ago

TI__Guru**** 176561 points

Hi,

Can I take a look at their schematic? Are they AC coupling the AUX and have the 100k pullup and pulldown on AUX?

Thanks

David

0 Neal Zhu over 4 years ago in reply to David (ASIC) Liu

Expert 2470 points

AUX have 100K pull-up and pull-down，

pull-up and pull-down resistors are removed test，AUX also has no signal，

SCH,Thanks！

0 David (ASIC) Liu over 4 years ago in reply to Neal Zhu

TI__Guru**** 176561 points

Hi,

It looks like the panel requires the 100k pullup/pulldown on AUX, does AUX work with the 100k pullup/pulldown?

Thanks

David

0 Neal Zhu over 4 years ago in reply to David (ASIC) Liu

Expert 2470 points

The screen manufacturer said that AUX should work in Normal mode.

There is Semi-Auto Training mode in the Datasheet, is this mode Normal mode?

How to configure AUX to work in this mode (Semi-Auto Training)?

Thanks!

0 David (ASIC) Liu over 4 years ago in reply to Neal Zhu

TI__Guru**** 176561 points

HI,

Can you reach out to our local FAE to set up a call to discuss this issue? The AUX should work as long as it is designed correctly. The semi-auto link training is DP link training across the AUX.

Thanks

David

Interface

Interface forum

SN65DSI86: The signal AUX is not working,How are the registers for AUX configured,Apply to different screens