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Question regarding DS90UB914Q

Madhu Vatte
Intellectual 835 points
Other Parts Discussed in Thread: DS90UB914Q-Q1

Hello,

I am trying to build a camera module using the FPD-Link III Serializer and Deserializer.  I have a question regarding the Deserializer DS90UB914Q.  Figure 28 of the datasheet shows how to use the multiplexer on the Deserializer to enable a two camera system.

http://www.ti.com/lit/ds/symlink/ds90ub914q-q1.pdf

If I utilize the 2:1 mux in the deserializer I can potentially connect two cameras to one IC and go from 4 cameras to 8 cameras without impacting my deserialized IO pin count.

Also there is some documentation regarding frame synchronization … how does that work if I’m trying to synchronize cross two cameras using the same deserializer? Is there a buffer inside the chip to store the camera I’m not currently selecting/piping to my FPGA, or do I have to intentionally stagger my “frame sync’s” so I don’t have to deal with a frame-collision/dropped-data?

Thanks,

Madhu

  • 0
    TI__Genius 13475 points

    Madhu

    There is no internal buffer, the idea is that if the two cameras are synchronized, and you switch between the two cameras during the blanking interval then you will be able to swap the image on the display from one camera to the other.   The mux allows you to select between the two cameras not to deserialize the data from both simultaneously.