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DS90UB954-Q1: screen stuck as low temperature

Chuqiang Wen
Expert 5865 points
Part Number: DS90UB954-Q1

Tool/software:

Hi team, 

My customer is doing high and low temperature test for DS90UB954-Q1. The system work normally at high temp condition. But the screen was abnormal(stuck) at low temp condition(drop to below -20C). The I2C communication also become abnormal(communication fail randomly). 

Attached is the schematic and register setting of 954. Please help review and provide some general ideas to debug this issue. 

Customer also tried to add 10uF at VDD supply side, show as below. But the issue still exist. 

Low temp issue.rar

Thanks!

Ethan Wen

  • 0
    TI__Genius 16230 points

    HI Ethan, 

    Do you know what SER is being used with the 954?  Also is the DES and SER in the chamber or only the DES? Can we get a register dump from the 954 in a good and bad state grab all the indirect pages too? If possible, the initiation code would be great.

    Glenn