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DS90UH928Q-Q1: Abnormal display for DS90UH928

Peter Tseng

Mastermind 6170 points

Part Number: DS90UH928Q-Q1

Dear Sirs,

Customer use UH941 paired with UH928 is failed, the display is wrong.

But UH941 paired with UH948 is OK.

The schematics as attached.

AP02-Main-V1 (1).pdf

iMX8-SerDes-V1 (2).pdf

Please help to review if there is anything wrong with customer design.

Thanks.

over 3 years ago

0 Shu Huang over 3 years ago

TI__Mastermind 18046 points

Hi Peter,

I will look over the material you provided. Please allow me 1 week to review the schematics and provide feedback.

Best,

Shu

0 Shu Huang over 3 years ago

TI__Mastermind 18046 points

Hi Peter,

Can you provide me with the datasheets for the panels that the customer is using?

Best,

Shu

0 Peter Tseng over 3 years ago in reply to Shu Huang

Mastermind 6170 points

Hi Sir,

Here you are.

The setting of 941 and 928 also attached.

Thanks.

11-1.LCD-4.1寸-T-64967GD041HU-T.pdf

ds90ub941_IC2_setting.docx

928 I2C Register seeting.docx

0 Shu Huang over 3 years ago in reply to Peter Tseng

TI__Mastermind 18046 points

Hi Peter,

I appreciate the information. I will double check everything and get back to you by the end of the week.

Best,

Shu

0 Peter Tseng over 3 years ago in reply to Shu Huang

Mastermind 6170 points

removed due to wrong data for this post.

0 Shu Huang over 3 years ago in reply to Peter Tseng

TI__Mastermind 18046 points

Hi Peter,

I am attaching a document with a comment regarding some recommendations on the schematic. In addition, I looked over the 941 Register settings and noticed that the active resolution was set to 1280x720. The specification for the LCD panel that was provided states that the supported resolution is 1280x640. Please adjust the active resolution to the appropriate vertical timings.

Best,

Shu

iMX8-SerDes-V1_comment.pdf