The Quartus® II software prohibits you from using the LVDS I/O standard in I/O bank 1 in Cyclone® III devices when the configuration device I/O voltage is not 2.5V.
To workaround this, you need to change the configuration device I/O voltage to 2.5V.
To change the device configuration I/O voltage in Quartus II software, do the following:
- Navigate to Assignments>Device>Settings>Device and Pin Option>configuration
- Change the "Configuration Device I/O voltage" to "2.5V" or "Auto".