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It can be used to download a .iic file (EZ-USB FX2LP USB FX2 microcontroller firmware) as follows:
- recovery boot (USB EEPROM programming): it does not require that any firmware is already loaded in the USB FX2 microcontroller;
- update boot: upgrade a Generation 3 firmware version (USB EEPROM programming); it does require that a Generation 3 firmware is already loaded in the USB FX2 microcontroller.
For actual procedures, see this page, this video play list and this video play list.