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DS90UB962-Q1: Some data format and FPDLINK rate questions on 962 and 964

Zirui Su
Expert 5340 points
Part Number: DS90UB962-Q1

Hi team, 

For 964 and 962:

1. Could each CSI-2 lane reach to max lane rate (1.6Gbps) when we using 4 lanes at the same time? That is to say, is that 962/964 max output bandwidth is 1.6G*4=6.4Gbps?

2. How to calculate the FPDLINK rate with 962 or 964? Are they both fixed 3Gbps? I think 964 is only supporting DVP mode so it could only support a fixed fpdlink rate about 2 or 3Gbps? What about 962?

3. Besides, I know when customer is using 964, we should let them pair with 933 or 913, could 962 and 964 both support the following pclk transmission and each configuration we just want to use one input port.

  1. 1920*1080@60fps YUV 
  2. 1920*1080@30fps YUV
  3. 1280*3840@25fps YUV
  • 0
    TI__Mastermind 18755 points

    Hello Zirui,

    1. Yes the CSI lane rate is 1.6Gbps with 4 lanes meaning there is up to 6.4Gbps per port.

    2. The line rate for 962 if using CSI serializers is fixed at the speed stated in the datasheet.  The 964 using DVP serializers is dependent on the PCLK and mode of operation.  You can see the calculation in section 8.4.6.

    3.  I think this will end up being a limitation of the the serializer if anything?  Are you able to provide any more data like the color depth, pclk, etc.

    Regards,

    Nick

  • 0 in reply to Nicholas Darash
    TI__Expert 5340 points

    Hi Nick

    Yes, I provide the block diagram for your reference:

    Is that ok for the solution?

  • 0 in reply to Zirui Su
    TI__Mastermind 18755 points

    Hello,

    So are they trying to switch between each of the 3 options provided?  If so any of our CSI serializers can handle this, like the 935 or 953.  Are you saying that you want to use 913 or 933 though?  This is a parallel interface?  If so can you share the color depth and pclk frequency?

    Regards,

    Nick

  • 0 in reply to Nicholas Darash
    TI__Expert 5340 points

    Hi Nick,

    They all use 953 at SER side. 

    Here are the PCLK and data format:

    1. 1920*1080@60fps YUV422 = 2.4Gbps
    2. 1920*1080@30fps YUV422 = 1.2Gbps
    3. 1280*3840@25fps YUV422 = 2.4Gbps

    Do you think the solution is ok to use 953-962 combination like the diagram shown? Thank you.

  • 0 in reply to Zirui Su
    TI__Mastermind 18755 points

    Hello,

    If you are trying to aggregate all three sensors to a single CSI port then it is going to be very close to the bandwidth limit but it looks like it should work if you can take advantage of the continuous clock feature of the 962.

    Regards,

    Nick