• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 16 subscribers
  • Views 194 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TMUX646: 4:1 CSI-RX 4L Muxing

Alex Paul
Expert 4401 points
Part Number: TMUX646

Tool/software:

Dear Experts,

I would like to add for cameras to an MPU with 1x CSI-RX 4L Interface.

The Appnote: Developing Multiple-Camera Applications on AM62x

Describes a 4:1 line aggregator. I could not find any part that is capable to do this.
Can I use the following setup to aggregate 4-CSI Cameras to 1 CSI RX Port as described below? 

Kind Regards,
Alex

  • 0
    TI__Mastermind 28578 points

    Hi Alex,

    Should work but be mindful that when you put back to back muxes in series your performance diminishes since you're adding more to bus. Do you happen to know the symbol rate?

    See this app note for a little more on the effects of those cascading muxes
    https://www.ti.com/lit/an/scda047/scda047.pdf?ts=1707976166013

    Thanks,
    Rami

  • 0 in reply to Rami Mooti1
    TI__Expert 4401 points

    Thanks Rami,

    Do you know if there is any plan from TI to have a 4 channel Aggregator ? 

    Regards,

    Alex

  • 0 in reply to Alex Paul
    TI__Mastermind 28578 points

    Hi Alex,

    Currently we have no plans for a 4 channel aggregator. Best case would be to do as you're currently doing or thinking about this more, I think you could probably do away with the second TMUX646 and just use the /OE pins. Basically just shorting the outputs together and only turning on the device that is connected to the camera they want to access. You'd still have extra Coff added from the off channel but it should have less effect than having a second mux to go through.
    So tie the select pins together and then have the /OE toggle which one if being selected. 

    Thanks,
    Rami