A general introduction to USB bulk transaction and FX2 microcontroller firmware is available here. TE USB FX2 modules are shipped with a preloaded FX2 USB microcontroller reference firmware (for inside the EEPROM. For a description see the previous link) inside the EEPROM here.
The preloaded firmware exposes Trenz Electronic Firmware API (TE API Commands (FW APIs)) to the host computer software (through USB). To change the EEPROM content (reference firmware) from Generation 2 (VID/PID 0547/1002) to Generation 3 (VID/PID 0BD0/0300), you shall follow this procedure. You may also watch this video play list. For an introduction to USB FX2 microcontroller's firmware configuration, recovery boot and update boot.
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