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DS90UB954-Q1EVM: Two MIPI CSI2 2 lane outputs from two serialized camera inputs

Mishak Illos
Prodigy 10 points
Part Number: DS90UB954-Q1EVM
Other Parts Discussed in Thread: DS90UB954-Q1

I have a three camera system which I need to connect to jetson nano. The jetson nano does not support virtual channels see (forums.developer.nvidia.com/.../4). The solution is for the DS90UB954-Q1 deserializer to use 2 mipi lanes for the one camera and the other two lanes for the second camera. I am not sure if this is possible however because reading through the registers the only similar configuration is in replicate mode (for a single camera). 

System diagram:

The serializer in this configuration will be the DS90UB953

_____________________                    ________________            ________________
|                                        |                    |                              |            |
|  camera-serializer           |----------------|                              |            |  Jetson nano
|____________________|                    |  Deserializer         |----------|  mipi 0: 2 lane
 ____________________                     |  DS90UB954        |----------|  mipi 1: 2 lane
|                                        |                    |                              |            |
|  camera-serializer           |----------------|_______________|            |
|____________________|                                                                |
                                                                                                          |
 ____________________                     ________________            |
|                                        |                    |                              |            |
|  camera-serializer           |----------------|  Deserializer         |            |
|____________________|                    |  DS90UB954        |----------|  mipi 3: 4 lane
                                                              |_______________|            |_______________

  • 0
    TI__Guru** 108550 points

    Hello Mishak,

    the UB954 does not support 2x seperate MIPI outputs. The CSI-2 output can be used as a single port or dual port in replication mode.

    If you want seperated outputs, I recommend you using the UB960. This device has 2x CSI-2 outputs and can fulfill your expectation.