Jetson Orin Nano Development Board USB Configuration Issues

Issue Overview

Users developing bespoke carrier boards for the Nvidia Jetson Orin Nano are experiencing confusion regarding the power management and USB port configuration. The main symptoms include:

  • Uncertainty about the power-up sequence of components, particularly U3, when DC power is applied.
  • Questions regarding the correct allocation and usage of USB ports, specifically USBSS0, USB1, USBSS2, and USB2.
  • Concerns about controlling USB power supply to multiple USB 3.1 sockets using GPIO pins.

This issue arises during the design phase of custom carrier boards and involves hardware specifications such as the P3768-A04 schematic. Users are particularly concerned about whether certain pins are appropriately powered and how to manage their configurations effectively.

The frequency of these inquiries suggests that many users face similar challenges when integrating USB ports into their designs. This issue significantly impacts user experience by potentially leading to incorrect hardware setups and functionality failures.

Possible Causes

Several potential causes for these issues have been identified:

  • Hardware Incompatibilities or Defects: Misunderstandings in the schematic could lead to incorrect connections or power management.

  • Configuration Errors: Incorrect allocation of USB ports may lead to conflicts or unintended behavior, especially if ports are not configured as intended.

  • Driver Issues: If drivers do not support the custom configurations, it could result in non-functional USB ports.

  • User Errors or Misconfigurations: Users may misinterpret the schematic or overlook details that affect power management and port allocation.

Understanding these causes is crucial for diagnosing and resolving the issues effectively.

Troubleshooting Steps, Solutions & Fixes

To address the issues related to USB configuration on the Jetson Orin Nano Dev board, follow these comprehensive troubleshooting steps:

  1. Verify Power Management Configuration:

    • Check the P3768-A04 schematic for details on how U3 is powered when DC power is applied. Confirm that VDD_5V_SYS is appropriately enabled.
    • Ensure that both VDD_3V3_SYS and VDD_1V8 are correctly configured for delayed turn-on if necessary.
  2. Review USB Port Allocation:

    • Assess the proposed connections:
      • Connect USBSS0 and USB1 to one USB socket.
      • Connect USBSS2 and USB2 to another socket.
    • Confirm with documentation that this configuration does not conflict with existing allocations (e.g., USB0 and USBSS1 being used for recovery).
  3. Control GPIO Pins for Load Switching:

    • Determine if GPIO01 can be used to control a load switch for powering on/off the two USB 3.1 sockets.
    • Reference GPIO pin documentation to confirm GPIO01’s availability and control methods.
  4. Test Configurations:

    • Implement a simple test by connecting the proposed USB configurations and monitoring their functionality.
    • Use terminal commands to check device recognition and functionality once connected.
  5. Consult Documentation:

    • Refer to Nvidia’s official documentation on Jetson module adaptation for further guidance on software changes required for custom setups:
      https://docs.nvidia.com/jetson/archives/r35.4.1/DeveloperGuide/text/HR/JetsonModuleAdaptationAndBringUp/JetsonAgxOrinSeries.html?highlight=universal#porting-the-universal-serial-bus
      
  6. Best Practices:

    • Always cross-reference schematics with official documentation before finalizing designs.
    • Test each component individually before integrating them into a complete system.

By following these steps, users can better diagnose their issues with the Jetson Orin Nano Dev board’s USB configurations and implement effective solutions.

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