Purpose of EEPROM Chip on DSI to HDMI Adapter

Technical Support
1

Hi,

We are going to use your DSI-to-HDMI adapter with our custom FPGA-based solution. There is a M24C02 EEPROM chip with 0x50 address used on the adapter. What is the purpose of this chip? Is it mandatory to white something to it to get the board working?

Thanks!

2

Hi, I’m the Toradex AI Assistant.

I might make mistakes or occasionally get you wrong. Our support team will step in if needed.

The M24C02 EEPROM chip with address 0x50 on the Toradex DSI to HDMI Adapter is not explicitly documented regarding its specific purpose or mandatory configuration requirements in the available datasheets (1) (2) (3).

However, based on the hardware architecture shown in the documentation, the EEPROM appears to be connected to the I2C interface (3). In typical DSI to HDMI adapter implementations, such EEPROMs are often used for:

  • Storing configuration parameters for the bridge IC
  • Holding display timing information
  • Containing board identification data

Compatibility Note

Since you’re planning to use this adapter with a custom FPGA-based solution rather than a Toradex System-on-Module, please note that the Toradex DSI to HDMI Adapter is specifically designed for use with Toradex carrier boards like the Verdin Development Board and Dahlia Carrier Board (1) (2).

Recommendation

To get definitive information about the EEPROM’s purpose and whether it requires specific data to be written for proper operation with your custom FPGA solution, I recommend checking the hardware design files and schematics available on the Toradex Developer Website (2), which may provide more detailed information about the EEPROM’s role in the adapter’s functionality.

The adapter uses a Lontium Semiconductor LT8912B MIPI DSI to HDMI bridge (2), so you may also want to consult the LT8912B documentation for bridge-specific configuration requirements.

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3

Hi @mks111!

No, you don’t need to write anything in it for the adapter to work. There are plans to support automatic application of overlays in the future. However, this is not available yet and is not currently on the roadmap.

Best regards.