How to Avoid the Need for an External EEPROM - KBA83524

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    Question: Can I use the default VID/PID and default descriptors for the hub to avoid the need for an external EEPROM?

     

    Answer:

    You do not need an external EEPROM for the hub to operate. The hub will enumerate with the default VID/PID of 0x04B4/0x6560 (for HX2LP), or 0x04B4/0x6570 (for HX2VL). You can use this configuration for test/development purposes.


    However, for production, you will need your own VID/PID to pass USB compliance and get the hub certified. You can configure the hub to use your VID/PID either of the following ways:


    1.   Add an external EEPROM to your design. The external EEPROM will be programmed to provide your VID/PID, descriptors, and other hub configuration settings.

    2.   Purchase your parts with the internal fuse links set to your VID/PID (this is a factory function only and cannot be done after packaging).

    For more information, refer to the device datasheet.