How many cameras can be connected to Jetson Nano?

Specification that defines an interface between a camera and a host processor

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The Camera Serial Interface (CSI) is a specification of the Mobile Industry Processor Interface (MIPI) Alliance. It defines an interface between a camera and a host processor.

The latest active interface specifications are CSI-2 v4.1 (April ), CSI-3 v1.1 (March ) and CCS v1.1.1 (April ).[1][2][3]

Standards

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CSI-1 was the original standard MIPI interface for cameras. It emerged as an architecture to define the interface between a camera and a host processor. Its successors were MIPI CSI-2 and MIPI CSI-3, two standards that are still evolving.

The MIPI CSI-2 v1.0 specification was released in . It uses either D-PHY or C-PHY (Both standards are set by the MIPI Alliance) as a physical layer option. The protocol is divided into the following layers:

1. Physical Layer (C-PHY/D-PHY)
2. Lane Merger Layer.
3. Low Level Protocol Layer.
4. Pixel to Byte Conversion Layer
5. Application Layer

In April , the CSI-2 v2.0 specification was released. CSI-2 v2.0 brought support for RAW-16 and RAW-20 color depth, increase virtual channels from 4 to 32, Latency Reduction and Transport Efficiency (LRTE), Differential Pulse-Code Modulation (DPCM) compression and scrambling to reduce Power Spectral Density.[4]

In September , the CSI-2 v3.0 specification was released. CSI-2 v3.0 introduced Unified Serial Link (USL), Smart Region of Interest (SROI), End-of-Transmission Short Packet (EoTp) and support for RAW-24 color depth.[5][6]

MIPI CSI-3 is a high-speed, bidirectional protocol primarily intended for image and video transmission between cameras and hosts within a multi-layered, peer-to-peer, UniPro-based M-PHY device network. It was originally released in and got re-released in version 1.1 in .[7]

CCS

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The Camera Command Set (CCS) v1.0 specification was released on November 30, . CCS defines a standard set of functionalities for controlling image sensors using CSI-2.[8][9]

Technology & speeds

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For more JETSON NANO CAMERA MODULEinformation, please contact us. We will provide professional answers.

For EMI reasons the system designer can select between two different clock rates (a and b) in each of the M-PHY speed levels.[10]

M-PHY speed Clock rate Bit rate Gear 1 G1a 1.25 Gbit/s G1b 1.49 Gbit/s Gear 2 G2a 2.5 Gbit/s G2b 2.9 Gbit/s Gear 3 G3a 5 Gbit/s G3b 5.8 Gbit/s

See also

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References

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• e-CAM81_CUNX_H01R1 has support for NVIDIA® Jetson&#; TX2 NX, Xavier&#; NX and Nano&#; developer kit.
• It is a 4K camera that comes with the HDR capability which helps to produce exceptionally clear and sharp images in challenging lighting conditions. This 4K HDR camera also has a high Signal to Noise Ratio (SNR), which helps to capture images with less noise in low lighting conditions
• Customer can choose the Jetson&#; module according to their application requirements.

Currently e-con provides release package to support NVIDIA® Jetson Xavier&#; NX / TX2 NX and Nano&#; developer kit. For supporting your hardware setup, kindly write your requirements to .

• Although all the Jetson Xavier&#; NX / TX2 NX and Nano&#; developer kits have same camera interface support (2x2-lane MIPI CSI interface), the Jetson&#; TX2 NX and Jetson Xavier&#; NX module has far more capabilities in terms of camera performance.
• For example, Jetson Nano&#; module has maximum support for 4 (2-lane) MIPI CSI cameras, whereas Jetson&#; TX2 NX module supports up to 5 (2-lane) MIPI CSI cameras and can stream up to 12 MIPI CSI cameras via virtual channel support. Jetson Xavier&#; NX module supports up to 6 (2-lane) MIPI CSI cameras and can stream up to 24 MIPI CSI cameras with virtual channel support.
• For more information on the hardware differences, please refer to this link

e-CAM82_CUMI_MOD camera module has an on-board ISP and will provide the frames in UYVY format. So, this product does not use the ISP in Jetson Nano&#;, Jetson&#; TX NX and Jetson Xavier&#; NX.

Currently the maximum supported FCC cable length is 15cm and it is supplied by default along with the product. For customization, kindly write your requirements to .

NVIDIA® Jetson Xavier&#; NX developer kit will support up to 2x2-lane cameras. You can use a custom carrier board for Jetson Xavier&#; NX module to connect
3x4-lane or 6x2-lane cameras.

NVIDIA® Jetson&#; TX2 NX developer kit will support up to 2x2-lane cameras. You can use a custom carrier board for Jetson Xavier&#; NX module to connect
3x4-lane or 5x2-lane cameras.

The camera board weight is 21 grams without lens and 29 grams with lens.

• e-con Systems provide V4L2 based camera driver. And hence it can be accessed by OpenCV.
• For more details, refer this blog - how to achieve maximum performance using OpenCV.
• In this blog, the installation steps will be referred to Jetson&#; TX2. But you can use this as reference and port the same to Jetson Nano&#;, Jetson&#; TX2 NX and Jetson Xavier&#; NX.

CUDA and OpenCV can be installed using SDK Manager application provided by NVIDIA®. SDK Manager application has an option to install the CUDA and other software tool kit to Jetson&#; board without erasing the rootfs. For more information, refer the SDK.

• For quick reference, you can start with Getting Started Manual document under technical documents section.
• This document contains the detail about the product deliverables, how to connect the camera to Jetson&#; TX2 NX and how to flash the quick start package and test the camera.

The default lens supplied with the camera has IR Cut filter- filters the IR light. You can test it using other IR pass lens. For choosing different lens, kindly write your requirement to .

By default, there is no trigger support. For customization, kindly write your requirements to

Currently, e-con Systems provide camera driver for NVIDIA® Jetson&#; TX2 NX, Xavier&#; NX and Nano&#; developer kit.

Current camera driver and firmware doesn't support getting RAW Bayer frames from camera. e-con Systems can customize the camera driver and firmware according to your requirement. For customization, kindly write your requirements to .

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