I2S Interface Differences on Jetson Orin Nano

Issue Overview

Users are seeking clarification on the differences between I2S0 and I2S1 interfaces on the Nvidia Jetson Orin Nano development board. Specifically, they want to understand if there are any functional distinctions between these interfaces when connecting audio devices such as an amplifier and a microphone codec. This information is crucial for proper audio setup and configuration in projects utilizing the Jetson Orin Nano.

Possible Causes

The confusion regarding I2S interface differences could stem from:

1. Lack of clear documentation: The official documentation might not explicitly state the functional equivalence of I2S0 and I2S1.
2. Assumptions based on other platforms: Users might be familiar with other systems where different I2S interfaces have distinct capabilities.
3. Specific use case requirements: The need to connect both an audio amplifier and a microphone codec might lead to questions about optimal interface selection.

Troubleshooting Steps, Solutions & Fixes

To address the confusion and provide clarity on the I2S interfaces of the Jetson Orin Nano:

1. Consult the Design Guide: As mentioned in the forum, the official Design Guide for the Jetson Orin Nano is the primary source of information. Users should thoroughly review this document for detailed specifications of the I2S interfaces.

2. Understand I2S interface equivalence: According to the forum response, there is no functional difference between I2S0 and I2S1 on the Jetson Orin Nano. This means that either interface can be used for connecting audio devices without compromising functionality.

3. Device connection strategy:

   • Connect the audio amplifier to either I2S0 or I2S1, based on physical convenience and board layout.
   • Similarly, connect the microphone codec to the other available I2S interface.
   • Ensure proper configuration in software to address the correct I2S interface for each device.

4. Software configuration:

   • When setting up the audio devices in software, make sure to use the correct I2S interface designations (I2S0 or I2S1) that correspond to your physical connections.
   • Consult the Jetson Linux Developer Guide for detailed information on configuring I2S interfaces in software.

5. Best practices:

   • Document your connections and configurations for future reference.
   • When designing PCBs or integrating the Jetson Orin Nano into a larger system, consider the physical layout and accessibility of both I2S interfaces to optimize your design.

6. Further assistance:

   • If you encounter any issues or need more specific information, consider:
     • Posting detailed questions on the NVIDIA Developer Forums
     • Consulting the comprehensive documentation available on the NVIDIA Developer website
     • Reaching out to NVIDIA support if you have a developer account with support entitlements

By following these steps and understanding that I2S0 and I2S1 are functionally equivalent on the Jetson Orin Nano, users should be able to successfully set up their audio devices without concerns about interface-specific limitations.