Jetson Orin AGX CSI bandwidth

[Carlos001]

Hi,

Can you provide information on any limitations in the Orin AGX NVIDIA devkit’s CSI lanes? Specifically, is the devkit capable of achieving the reported Orin AGX 2.5Gbps bandwidth per lane?

We are asking because in a previous project, we used a Xavier AGX NVIDIA dev. kit and discovered that the CSI lanes only supported a maximum bandwidth of 1.5 Gbps, despite the Xavier AGX SOM supporting 2.5Gbps per CSI lane. This is the URL of the Xavier AGX case: https://forums.developer.nvidia.com/t/agx-xavier-csi-bandwidth/178057

Regards.

[dante1555]

Hello. Honestly we were only estimating system performance with AGX Xavier back then, but we haven’t developed real system and haven’t checked real perfomance and I cant tell any specific numbers.
Best regards.

[JerryChang]

hello Carlos001,

please refer to Jetson AGX Orin Series Product Design Guide for [Chapter-10. Video Input].
however, you may also check Sensor Software Driver Programming, when the output data rate is greater than 1.5Gbps, skew calibration is required for DPHY sensors.

[Carlos001]

Hi @JerryChang,

Thank you for the information, do you have the spec for the Orin NVIDIA DevKit carrier, specifically the CSI MIPI lanes specs. In this carrier, when it was designed, was it for: 1.5Gbps, 2.5Gbps, other value?

Regards.

[JerryChang]

hello Carlos001,

for SOM, the maximum CSI bandwidth per lane is 2.5Gbps. (in DPHY)
let me check internally for the devkit carrier board limitation, thanks

[JerryChang]

hello Carlos001,

sorry for late reply due to some internal discussions.

it’ll list in the doc if there’s bandwidth limitation, also, you may see-also Jetson AGX Orin Developer Kit Carrier Board Specification.
as you can see, for [Table 3-2 Camera Module CSI PCB Trace Allowances – DPHY]. we’ve also evaluated CSI up-to 2.5 Gbps on Orin carrier board.

[Carlos001]

Hi Jerry,

Thank you for your response and information

Regards.