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A recovery boot (aka TE USB FX2 firmware recovery) is a multi-step boot operation:
- Open a
USB Firmware Upgrade Tool
(double click OpenFutNet.exe
).
![](https://wiki.trenz-electronic.de/download/attachments/10616994/OpenFutNetCypressDeviceInserted.png?version=1&modificationDate=1376404948872&api=v2)
- Click OK into the pop-up. (In the next version, it will appears only if Verbose flag is checked).
![](https://wiki.trenz-electronic.de/download/attachments/10616994/OpenFutNetCypressDeviceInsertedWarning.png?version=1&modificationDate=1376404813350&api=v2)
- Press the “
Select *.iic file or enter file path
” button corresponding to the firmware file pathname selection. - Select a suitable
.iic
firmware upload file. You can download the firmware availbale at Trenz Electronic GitHub.
![](https://wiki.trenz-electronic.de/download/thumbnails/10616994/OpenFutNETcurrentFW.png?version=2&modificationDate=1376402452009&api=v2)
- Press the “Program USB: write IIC EEPROM” button if you want the *
.iic
file to be written into the large EEPROM of the EZ-USB FX2LP USB FX2 microcontroller. - OpenFutNET informs you, with a pop-up, that a Cypress device has been inserted and not a Trenz Electronic device.
![](https://wiki.trenz-electronic.de/download/attachments/10616994/RecoveryProcedurePopUp.png?version=1&modificationDate=1376406510974&api=v2)
- Move the EEPROM switch to enable the USB EEPROM connection, if it is not already done.
- Click 'Yes' in the pop-up.
- When the progress bar reaches 100%, the following log text message notifies the successful completion of the USB upgrade procedure.
![](https://wiki.trenz-electronic.de/download/attachments/10616994/OpenFutNetFWProgrammedCypress.png?version=1&modificationDate=1376408214468&api=v2)