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DS90UB940-Q1: CSI-2 output was hang-up to high level during operations

K.Yaita
Guru 29720 points
Part Number: DS90UB940-Q1
Other Parts Discussed in Thread: DS90UB925Q-Q1,

Hi Team,

My customer is designing DS90UB940-Q1 (Deserializer) with DS90UB925Q-Q1 (Serializer).
He sometimes saw CSI-2 output of DS90UB940-Q1 was hang-up to high level during operations.

He also found the issue was improved if he toggled bit 0 (CSI_DIS) of 0x6A register in this case.
Do you have an experience for this issue?
Do you have any idea for root cause of it?

Best Regards,
Yaita / Japan disty

  • 0
    TI__Expert 8165 points
    Hello-

    Would it be possible for your customer to capture the 940 LOCK, PASS, and CSI-2 output signals at startup when the issue is observed? A register dump of both device would also be useful for our further investigation.

    Regards,
    Davor