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DS90UB936-Q1:Register settings

yuya noguchi
Prodigy 60 points
Part Number: DS90UB936-Q1

Tool/software:

I am trying to output camera video using ds90ub936.
The video was displayed using a third-party evaluation board, etc.
The video is 1610/744/30[fps] at 800Mbps/2 lanes.
The videos are overlapping. Can this be resolved by changing the deserializer settings?
I'm not sure if this is a board setting or a deserializer setting, so please let me know if there are any possibilities.

  • 0
    TI__Guru** 108100 points

    Hello Yuya,

    what is the SER used in the camera?

    Can you provide the latest schematic for both, SER and DES.

    Also, please share the register configurations you are applying on the SER and DES after power up. 

  • 0 in reply to Hamzeh Jaradat
    Prodigy 60 points

    Hello Hamzeh

    Circuit diagram and settings are attached. Serializer is 913 The serializer is from a vehicle, so the settings are unknown. Deserializer is 936 Register settings are set in the following order: 0x60, 0x4C, 0x01 0x60, 0x6D, 0x7B 0x60, 0x58, 0x58 0x60, 0x70, 0x2B 0x60, 0x1F, 0x02 0x60, 0x33, 0x21 0x60, 0x21, 0x04 0x60, 0x20, 0x20 0x60, 0x7C, 0x3B 0x60, 0x4C, 0x00 Other registers are default. PDB is connected to ground.

  • 0 in reply to yuya noguchi
    TI__Guru** 108100 points

    Hello Noguchi,

    Not sure I understand your provided registers. Is this a dump from the current register values? Or this is the programing sequence at power up?

    Can you specify what is the register address and what are the register values?

    From the MODE pin settings, I can see you are using RAW10. At the same time, you said, the settings on the 913A side are unknown. Means you are not confident this mode is correct, right?

  • 0 in reply to Hamzeh Jaradat
    Prodigy 60 points

    Hello Hamzeh.
    These are the settings for when the power is turned on on the serializer side.
    The settings are in the order of 0x60: address, 0x4C: register, 0x01: data.
    Is this the correct way to write?
    There are many unknowns about the register settings on the serializer side, but I am using a commercially available board from another company that can be quantified.
    I have confirmed that 75MHz RAW10 is being output from the serializer.

  • 0 in reply to yuya noguchi
    TI__Guru** 108100 points

    Hello Yuna,

    yuya noguchi said:
    I have confirmed that 75MHz RAW10 is being output from the serializer.

    What do you mean by 75MHz? Is this the image sensor's PCLK?

    I have checked your register settings and schematic; they seem okay to me. I just have the following feedback:

    In reg 0x21 -- using Synchronized forwarding with just one camera is not a good idea. Please use the round-robin mode.

    In reg 0x7C-- you may need to try other polarities or Auto polarity!

    yuya noguchi said:
    The videos are overlapping. Can this be resolved by changing the deserializer settings?
    I'm not sure if this is a board setting or a deserializer setting, so please let me know if there are any possibilities.

    To your original question, On the SER or on the DES there is no possibility to cause such image overlapping due to the very small memory the devices have, which is sufficient for max 2-lines.
    I guess, you need to double check the SoC/processor's settings.

  • 0 in reply to Hamzeh Jaradat
    Prodigy 60 points

    Hello Hamzeh.

    Previously I was trying the combination of DS90UB913 and DS90UB934.
    This is the PCLK measured with that combination.
    1. Check the settings of register 0x21 and 0x7C.
    2. Check the Soc/processor settings.
    So these are the two points that need to be checked.
    Thank you.

  • 0 in reply to yuya noguchi
    TI__Guru** 108100 points

    Hello Yuya,

    Yes, you are correct.