• State
  • Locked Locked
  • Replies 7 replies
  • Subscribers 32 subscribers
  • Views 233 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DS90UB954-Q1: Video streaming issue with one particular board

SHIJU R
Prodigy 50 points
Part Number: DS90UB954-Q1
Other Parts Discussed in Thread: DS90UB953-Q1,

Tool/software:

Hi Team,

I have used the part DS90UB954-Q1 De-Serializer in my board and with DS90UB953-Q1 Combinations in Camera Module. One of my board iam facing video streaming issue ,MIPI output is not coming from the Deserializer. When connecting the same camera to the other board video stream getting properly. One particular board having issue with DS90UB954-Q1 De-Serializer. The configurations we are applying are same for both working board and Non working board. Pease refer the below register status read out from both boards. In Non working board it seems CSI disabled (With 0x33 status read) . Is there any internal diagnostics making this CSI disable? Can you please guide me for further debug.

We are only using one port RX0.

Register Address
DS90UB954-Q1		 Non Working Board working board Remarks
0x04 0xdf 0xdf TRUE
0x05 0x01 0x01 TRUE
0x06 0x00 0x00 TRUE
0x4D 0x13 0x13 TRUE
0x4E 0x04 0x6d FALSE
0x55 0x00 0x00 TRUE
0x56 0x00 0x00 TRUE
0x57 0x00 0x00 TRUE
0x7A 0x00 0x00 TRUE
0x7B 0x00 0x00 TRUE
0xB9 0x33 0x33 TRUE
0xD0 0x00 0x00 TRUE
0x24 0x00 0x00 TRUE
0x36 0x00 0x00 TRUE
0x37 0x00 0x00 TRUE
0x35 0x00 0x01 FALSE
0x73 0x00 0x05 FALSE
0x74 0x00 0x14 FALSE
0x75 0x00 0x06 FALSE
0x7C 0x20 0x20 TRUE
0x7D 0x00 0x00 TRUE
0xB3 0x00 0x08 FALSE
0x6D 0x78 0x7c FALSE
0xB8 0x88 0x8c FALSE
0x33 0x00 0x01 FALSE

Thanks Regards

SHIJU.R

  • 0
    TI__Mastermind 20811 points

    Hi Shiju,

    Do you know if the camera is streaming on the non-working board? I can see that the SER/DES are locked in register 0x4D, however in the line count and line length registers (0x73-0x76) are all 0x00 on the non-working board. 

    Best,

    Thomas

  • 0 in reply to Thomas Bejin
    TI__Mastermind 20811 points

    Hi Shuji,

    One other item to bring-up, there's a different strap for coax vs STP mode on the des in register 0x6D. Mode is also different in register 0xB8. Do you know if the voltage on the mode pin & voltage divider which selects it is the same? 

    Best,

    Thomas

  • 0 in reply to Thomas Bejin
    Prodigy 50 points

    Hi Thomas,

    Voltage at the Mode pin is same for both boards. But while reading the registers those mode seems different. Any other reason will be there for this kind mode mode change other than mode pin settings?

  • 0 in reply to SHIJU R
    TI__Mastermind 20811 points

    Hi Shiju,

    The mode is set at power-up, could you confirm that the power sequence is correct here? Included reference from the datasheet below:

    Best,

    Thomas

  • 0 in reply to Thomas Bejin
    Prodigy 50 points

    Hi Thomas,

    Sorry for the late reply 

    Here Green is 1.8V , Yellow internal 1.1V and Orange is PDB Pin , 

    Internal 1.1V is generated along with 1.8V input.  Is is may be due to any internal failure?

  • 0 in reply to SHIJU R
    TI__Mastermind 20811 points

    Hi,

    Let me check back on the details of this tomorrow for you.

    Best,

    Thomas

  • 0 in reply to Thomas Bejin
    TI__Mastermind 20811 points

    Hi Shuji,

    I don't see the mode pin in the power sequence, do you know if this can be captured as well? Looking back at the abnormal registers I can see that the mode was strapped incorrectly, the pin may not have stabilized by the time PDB reached logic high.

    Best,

    Thomas