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We are trying to bring-up a board with FX3. Unfortunately, we are unable to get any response from FX3 over USB port. Ideally we will upload our firmware over USB but when we plug USB cable we see nothing on the other hand of the cable. We at least expect a new USB device found message from the USB bus assuming USB 2.0 should work out of the box. FX3 is completely dead. We double checked mode pins and all related functionality. Can anyone shed some light about what is missing on our design? I'm attaching related schematics to the message.