Connecting Power On/Off, Suspend/Wake, and Reset Buttons to Jetson Orin Nano Developer Kit

Issue Overview

Users are seeking clarification on how to properly connect power on/off, suspend/wake, and reset buttons to the Jetson Orin Nano Developer Kit. The main concerns include:

• Correct pin connections for various buttons on the Button Header
• Potential issues with the Jetson not shutting off when Wi-Fi is enabled
• Confusion about auto-login and its relation to power management
• Implementation in a battery-powered prototype device

The issue primarily affects users who are developing custom enclosures or prototypes using the Jetson Orin Nano, particularly those requiring external power control and reset functionality.

Possible Causes

1. Incorrect pin connections: Misunderstanding the pin layout or function of the Button Header can lead to improper button functionality.

2. Misinterpretation of documentation: The Jetson Orin Nano Developer Kit Carrier Board Specification document may not be clear enough for some users, causing confusion about proper connections.

3. Auto Power On feature misunderstanding: Users may confuse the Auto Power On feature with auto-login, leading to incorrect assumptions about power management.

4. Wi-Fi-related shutdown issues: There might be a misconception about Wi-Fi interfering with proper shutdown procedures, possibly conflating headless mode operations with general use.

Troubleshooting Steps, Solutions & Fixes

1. Correct Button Header Connections:

   • Always short pins 5 and 6 on the Button Header.
   • Connect the power on/off button to pins 1 and 2.
   • Connect the reset button to pins 7 and 8.
   • Connect the sleep/wake button to pins 11 and 12.

2. Auto Power On Configuration:

   • To disable Auto Power On, ensure that pins 5 and 6 are shorted.
   • If pins 5 and 6 are not shorted, the Jetson will power on immediately when connected to a power source.

3. Power Management Clarification:

   • Auto Power On is not related to auto-login. It only affects how the device powers on when connected to a power source.
   • For a battery-powered prototype, ensure proper power management settings are configured in the operating system.

4. Wi-Fi and Shutdown Issues:

   • The reported issue of Jetson not shutting off with Wi-Fi enabled may be specific to headless mode operations.
   • For a prototype with a display, this should not be a concern.
   • If experiencing shutdown issues:
     1. Check for any running processes that might prevent shutdown.
     2. Ensure all software and firmware are up to date.
     3. Test shutdown behavior with Wi-Fi disabled to isolate the issue.

5. Implementing in a Battery-Powered Prototype:

   • Follow the pin connection guidelines mentioned above for power on/off, reset, and sleep/wake functionality.
   • Implement proper power management in your software to handle battery-related events and optimize power consumption.
   • Consider using the Jetson’s built-in power management features, such as sleep states, to extend battery life.

6. Additional Considerations:

   • Refer to the official NVIDIA Jetson Orin Nano Developer Kit Carrier Board Specification document for detailed pinout information.
   • Ensure proper electrical connections and use appropriate resistors or debouncing circuits if necessary when implementing custom buttons.
   • Test each button functionality thoroughly before finalizing your prototype design.

If you encounter persistent issues or need further clarification, consult the official NVIDIA Jetson documentation or reach out to their support forums for more specific guidance.