Dedicated ID Pin for USB on Nvidia Jetson Orin Nano Dev Board

Issue Overview

Users of the Nvidia Jetson Orin Nano Dev Board have reported confusion regarding the absence of a dedicated ID pin for USB communication, which was available in previous models like the Jetson TX2. The main symptoms include:

• Inability to identify a specific pin for USB communication on the Orin Nano.
• Questions about alternative pins that can be utilized for USB functionality.
• Concerns about how to implement USB communication on custom carrier boards.

This issue typically arises during the design phase of custom carrier boards or when attempting to establish USB connections. Users have expressed uncertainty about the correct configuration, particularly when needing to use USB in both Device and Host modes without modifying the device tree post-flashing. The problem impacts the ability to effectively utilize USB ports, potentially hindering project development and functionality.

Possible Causes

• Hardware Incompatibilities: The Orin Nano may not have a direct equivalent to the TX2’s dedicated USB pin, leading to confusion.

• Configuration Errors: Users may not be aware of alternative pins that can serve the same purpose, resulting in misconfigurations.

• Documentation Gaps: Insufficient clarity in documentation regarding which pins can be used for USB communication may contribute to user misunderstanding.

• Driver Issues: Problems with drivers could prevent proper recognition of USB configurations.

• User Errors: Misunderstandings about pin assignments or incorrect wiring may lead to failures in establishing USB communication.

Troubleshooting Steps, Solutions & Fixes

1. Review Documentation:

   • Consult the USB section of the Orin NX Design Guide for detailed information on USB pin assignments and configurations.

2. Identify Alternative Pins:

   • Users have successfully utilized:
     • GPIO_06 as a valid ID pin.
     • GPIO3, which has also been validated for similar purposes.
   • Verify these pins on your custom carrier board design.

3. Testing Configuration:

   • To test if GPIO_06 or GPIO3 works as an ID pin:
     • Connect your setup and monitor USB communication.
     • Use terminal commands to check device recognition:

       lsusb
       dmesg | grep usb
       

4. Implementing OTG Functionality:

   • For using USB0 as OTG in both Device and Host modes:
     • Follow guidelines from related discussions, such as "How to use USB0 as OTG in Device and Host Mode without changing device tree after flashing."

5. Update Firmware and Drivers:

   • Ensure that you are using the latest firmware and driver versions compatible with the Orin Nano. Check Nvidia’s official website for updates.

6. Best Practices for Future Prevention:

   • Always refer to the latest design guides before starting hardware projects.
   • Engage with community forums for shared experiences and solutions.
   • Document any successful configurations for personal reference or future projects.

7. Unresolved Aspects:

   • Further clarification may be needed regarding specific configurations for different types of USB connections (e.g., Micro USB).
   • Users are encouraged to continue discussions in forums for ongoing support and updates on best practices.

By following these steps, users should be able to effectively troubleshoot and implement USB functionality on their Nvidia Jetson Orin Nano Dev Boards.