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DS90UB933-Q1: HS / VS abnormal on 934

Kai Hsiao
Guru 12675 points
Part Number: DS90UB933-Q1


Hi Sir 

Please refer to below figure ,you could see 934's HS and VS will drop suddenly 

but will i change another sensor module , this issue will not happen again ,so I think 934 system is good 

do you have any idea about HS and VS drop issue ? GPO2 or sequence or something else ?

  • 0
    TI__Intellectual 1930 points

    Hello,

    Can you please share some more information on your setup?

  • 0 in reply to Mostafa Shuva
    Guru 12675 points

    Hi Shuva

    What's information you need ? could you give me the example ?

    Sensor to 933 HS/VS is good 

    934 HS/VS to SOC is bad ,it will cause system hang up

    Change another sensor board the 934 HS/VS is good 

  • 0 in reply to Kai Hsiao
    TI__Intellectual 1930 points

    Hi Kai, 

    What sensor are you using and what mode of operation is the 933 and 934? For example, are you using PCLK from imager or external PCLK. Is he 933/934 in 10 bit, 12 bit HF, or 12 bit LF mode?

  • 0 in reply to Mostafa Shuva
    Guru 12675 points

    Hi Shuva

    1. AR0144AT 12bit 

    2. 933 0x05 register is 06

    3. 934 0x6D register is 7E

    4. PCLK=74.25Mhz (from image sensor)

    So i need to change 0x05 register from 06 to 22 ? 

  • 0 in reply to Kai Hsiao
    TI__Intellectual 1930 points

    Hello Kai,

    Yes. Please try that. It seems the mode strapping is not correct, so this should at least ensure the device is is the proper mode.

  • 0 in reply to Mostafa Shuva
    TI__Guru** 103215 points

    Hello Kai,

    Were you able to try Mostafa's suggestion? Did it resolve the issue?

    Best Regards,

    Casey 

  • 0 in reply to Casey McCrea
    Guru 12675 points

    Hi Casey / Mostafa

    still have issue 

    Could you kindly help to review below register ?

    DrvDS90UB933( 0x0E , 0x15 )

    Delay1ms(250)

            DrvDS90UB933( 0x0E , 0x99 )

            DrvDS90UB933( 0x01 , 0x20 )

            DrvDS90UB933( 0x03 , 0x45 )

            DrvDS90UB933( 0x05 , 0x0a ) => 00001010

            DrvDS90UB933( 0x35 , 0x01 )

            DrvDS90UB933( 0x0C , 0x15 )

            DrvDS90UB933( 0x0D , 0x99 )

    DrvDS90UB934( 0x4C , 0x12 );

            DrvDS90UB934( 0x0D , 0x09 ); 

            DrvDS90UB934( 0x58 , 0x58 ); 

            DrvDS90UB934( 0x3B , 0x00 ); 

            DrvDS90UB934( 0x6D , 0x7F ); 

            DrvDS90UB934( 0xB0 , 0x08 ); 

            DrvDS90UB934( 0x5C , 0xB0 ); 

            DrvDS90UB934( 0x08 , 0x17 ); 

            DrvDS90UB934( 0x0F , 0x03 ); 

            DrvDS90UB934( 0x5D , 0x34 ); 

            DrvDS90UB934( 0x65 , 0x34 ); 

            DrvDS90UB934( 0x6D , 0x7E );

  • 0 in reply to Kai Hsiao
    Guru 12675 points

    HI Mostafa

    Could you help to check again about this issue?

  • 0 in reply to Kai Hsiao
    TI__Intellectual 1930 points

    Hello Kai,

    While looking through your register writes, I noticed that you write to 934 register 0x6D twice. The first time you write 0x7F which corresponds to RAW10 mode, and the second time you write 0x7E which corresponds to RAW12 HF mode. Please remove the first write (0x7F) since the imager you are using is RAW12.

    Also, on the 933 it seems you are still not writing 0x22 to register 0x05. Please also do that so we can ensure the write mode is latched. If 0x05[4] = 1. then you will know that the mode has been latched properly by the device.