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DS90UB953A-Q1: 24MP Image sensor data rate issue.

Jongpil Chae
Prodigy 200 points
Part Number: DS90UB953A-Q1

Hello, 

I'm developing camera sensor with SER/DES (DS90UB953A / DS90UB954).

New  project  will be use the 24MP sensor.   (5746X4320 Pixel , 10bit raw data, CSI-2 4Lane)

Is it possible to use cropping image sensor as shown below? 

full resolution  data rate   :    5760 x 4320 x 30fps x 10bit = 7.4Gbps    ( I think  it is over range ) 

4k resolution   data rate   :    3714x 2160 x 60fps x 10bit  =  4.97Gbps    (it possible to use SER/DES) . 

Jongpil Chae

   

  • 0
    TI__Guru** 103215 points

    Hello Jongpil,

    DS90UB953A-Q1 can support up to 832Mbps/lane for the CSI-2 input interface. Can you confirm that the desired configuration uses a MIPI CSI-2 data rate of 832Mbps/lane or less? The above configuration still appears to be higher than the 953A speed requirement 

    Best Regards,

    Casey 

  • 0 in reply to Casey McCrea
    Prodigy 200 points

    Hello.  Casey,

    I want to send to Host in 4K 60fps MIPI data using with SER/DES.

    I want to share the data bandwidth by transmitting the data of one sensor to two serializers as shown below.

    Is it possible to dividing data like this system block-diagram?

    Best,

    Jongpil Chae

  • 0 in reply to Jongpil Chae
    TI__Guru** 103215 points

    Hello Jongpil,

    Does this sensor actually have two independent MIPI CSI-2 interfaces? If not, then this type of architecture can not be supported. Because in this architecture each serializer is expecting a 2 lane MIPI CSI-2 packet structure but the sensor is outputting a 4 lane packet structure. It will not pass correctly through the SERDES because the 953s will throw a protocol error. 

    Best Regards,

    Casey  

  • 0 in reply to Casey McCrea
    Prodigy 200 points

    Hello  Casey, 

    Sensor is not support two independent MIPI CSI-2 interface.  

    As calculated below, is the DS90UB953a's maximum resolution 2608x2400 correct?

     2560x 2048 x 10bits x 60fps = 3.14Gbps.     

     

     Please let me know if there is any way to send 4k resolution camera video.

     Best , 

     Jongpil Chae

  • 0 in reply to Jongpil Chae
    TI__Guru** 103215 points

    Hello Jongpil,

    The maximum resolution is a factor of frame dimensions, bits per pixel, and frame rate. It is best to go by the MIPI clock rate requirement which is 832Mbps/lane maximum. 

    Please contact your local TI sales rep to discuss roadmap solutions for higher data rates

    Best Regards,

    Casey