Bootloader is inbuilt inside FX3. Once you connect the FX3 to the PC via USB Cable, open Control Center application (This application comes along with FX3 SDK).
You can see the FX3 Bootloader showing up in the control center app. (Provided you use default jumper settings on your development board)
For more details, refer section 7 in the below application note:
This will show how to load your first firmware into FX3 using the control center software (via FX3's bootloader)
- Madhu Sudhan
Thank you for your response. It means the FX3 shipped to customer with the bootloader built in the chip. is it true?
Yes, you are correct!