DS90UB941AS-Q1: 941+948 Asymmetric Splitting function can different panel with different hsync/vsync POLARITY

user6105554

Prodigy 151 points

Part Number: DS90UB941AS-Q1

It is possible for two screens that is "sync mode" to have different sync polarity requirements,

how does the 941+ 948x2 handle this situation?

can 948 or 948 can revert POLARITY of only one port of FPD3 output?

over 2 years ago

0 Ikram Haque over 2 years ago

TI__Mastermind 28150 points

Hi, just to clarify what are you referring to by "sync mode"? And when you mention polarity of FPD3 output, you are referring to the sync signals right? Or are you also looking to swap the polarity of the FPD-link traces? Because that would be a different case.

For asymmetric splitting are you using cropping and a single DSI input? I will check about whether hsync,vsync have to be same and get back to you by Thursday.

Best regards,
Ikram

0 user6105554 over 2 years ago

Prodigy 151 points

I am refering to POLARITY of 948 output LVDS sync signal. both LCD pannel care about hs&vs signal. but they requst different hs&vs signal polarity.

i am using single DSI input and make croping.

0 Ikram Haque over 2 years ago in reply to user6105554

TI__Mastermind 28150 points

Hi, I am looking into whether there is a way to swap the polarity with cropping and one DSI input. I will get back to you by Friday.

Best regards,
Ikram

0 Ikram Haque over 2 years ago in reply to Ikram Haque

TI__Mastermind 28150 points

Hi, with this device cannot support changing the polarity on one port with one DSI input and cropping.

If possible, you could consider having cropped video inputs to two DSI ports with different sync polarity and sending them on each FPD-link port (DSI0 to DOUT0, DSI1 to DOUT1), similar to Independent 2:2 Mode described in the datasheet.

Best regards,
Ikram

Interface

Interface forum

DS90UB941AS-Q1: 941+948 Asymmetric Splitting function can different panel with different hsync/vsync POLARITY