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DS90UB933-Q1: the connection between sensor and 933

Sherry Liang
Genius 10255 points
Part Number: DS90UB933-Q1

Dear team,

Recently my customer is trying to bringing up our 933&964. The camera sensor they use is OV490, and the connection between the sensor and our 933 is as below. The sensor output YUV D[9] to our DN0 of 933 and output D[0] to our DN9 of 933, is it ok?

Currently they can't show the normal display as below second picture, so we want to check whether the connection has some problem.

Thanks & Best Regards,

Sherry

  • +1
    TI__Mastermind 21240 points

    Hi Sherry,

    The YUV input to the UB933 does seem to be backward and my initial response is that the backwards routing is causing the discolored image. But could your customer perform the following checks first, before creating a new board with reversed routing?

    The UB964 deserializer needs to be configured to handle YUV422 10-bit data. Verify the following first:

    1. The UB964 has the MODE strap resistors set to RAW10 mode
    2. UB964 register 0x7C[7:6] = 00 (Normal RAW10 mode) 
      1. NOTE: Need to select the Rx Port first to write to in register 0x4C, before modifying register 0x7C
    3. UB964 register 0x70[5:0] = 0x1F (Data type code for YUV422 10-bit, according to the MIPI Alliance Specification for Camera Serial Interface 2)
      2. NOTE: Need to select the Rx Port first to write to in register 0x4C, before modifying register 0x70
    4. Also, if the UB933 is operating in 10-bit MODE, then DIN[10:11] should be open (Not Connected)

    After confirming the registers on the UB964, check to see if the video is fixed.

    If not, then I recommend checking to see if it is possible for the OV490 to be configured to reverse its output format, such that SDO 00 outputs YUV D[00]->DN0 and SDO 09 outputs YUV D[09]->DN9. 

    Best,

    Justin Phan

  • 0 in reply to Justin Phan
    TI__Genius 10255 points

    Hi Justin,

    Thanks for your suggestion. 

    The fault phenomenon still exist after being configured to YUV422 10bit. They will try to configure OV output. I will update to you if they got the test result.

    Thanks & Best Regards,

    Sherry

  • 0 in reply to Sherry Liang
    TI__Mastermind 21240 points

    Hi Sherry,

    In that case, I will wait for further updates.

    Best,

    Justin Phan