Jetson TX2 Mipi CSI interface problem

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

Hi，
In designing the camera circuit of TX2, I have a problem that I need to ask you for advice. The problem is as follows:
What is the maximum length of the wire from the mipi csi interface to the camera?

Thanks.

2

Hi, please check the table of MIPI DSI & CSI Interface Signal Routing Requirements in OEM DG for max trace delay.

3

Hi, thank you for your reply.

I mean: can I make a mipi-csi interface on the carrier board, at the same time,make the camera (such as imx185) into a module, keep an interface J2 on it, and then use a wire harness of about 3-4 meters to connect the J1 and J2, so will the camera work normally?
Looking forward to your reply!

Thanks

4

Hi yupw24,

As far as I know, the standard mipi-csi cables only work on distances below 30cm.
For longer distances SerDes solutions are implemented. As example FPD Link III supports transmission distances to 15 meters.

Greivin F.

5

No, the total trace length is limited as guideline, it includes all traces from module pin to camera pin.

6

As you said “As example FPD Link III supports transmission distances to 15 meters”, I choose the chip ds90ub954-q1, then what kind of camera should I choose? Can you give me some recommendations?

Looking forward to your reply!
Thanks

7

Hi,

The chip ds90ub954-q1 (serializer on camera side) requires a deserializer (ds90ub960-q1). I have been working with a SerDes configuration from D3 Engineering, they have a daughter board compatible with TX2:

Camera interface board:

This daughter board has FPD Link III and GMSL2 deserializers, I’m currently using an OV10640 (FPD Link III) on Xavier but it also works on TX2:

I hope this helps in your case.
Regards
Greivin F.