After the user has acquired the necessary hardware and software, follow these steps to operate the USB interface adapter:

1. Plug in the USB cable to both the PC and the USB interface adapter and wait for the green LED to illuminate.
   Troubleshooting: If the green LED does not illuminate after 30 seconds, check to ensure the USB cable is securely connected. If the connection is secure, try a different USB port. If a different USB port does not solve the problem, try to reboot the computer. If rebooting the computer does not fix the problem, try a different USB cable. If trying different USB cable does not solve the problem, contact TI technical support for help.
2. Plug in the 10-pin ribbon cable to both the USB interface adapter and an I²C device board. Make sure that the notch on the ribbon-cable connector matches the keyhole of the socket in the enclosure.
3. Power up the I²C board. Note that the default I²C speed is set at 100 kHz and the default pullups for I²C data and clock lines are set at 2.2 k?.
4. Open the Fusion Digital Power designer tool and follow the instructions for the GUI.
   Troubleshooting: If the I²C target board cannot talk with the USB interface adapter, first check to ensure the 10-pin ribbon cable has been securely connected. If the ribbon cable has been securely connected, check the I²C communication speed and the pullups for I²C data and clock lines suitable for the application. If not, modify the I²C communication speed and the pullups accordingly. If this still does not solve the problem, contact the manufacturer of the I²C targeted board for help.