leave a port without input in block diagram

Hi Ahoora,

Looks like Lite 20.1 also got the .tdf file in db folder.

I found this link which explains the pin default value and how does it work.

Seems like the actual meaning of pin default value is sets a default value of GND or VCC to a input pin in a Text Design File (.tdf).

**The pin default value is used when an input port to a lower level file is left unconnected in an upper level instance. Default values are only recognized in lower-level files—they are ignored for top level files. If a pin in the top level design has a default of VCC, it does not mean that if the device input pin is unconnected, it will default to VCC. This only has an effect on a lower level design pin.

So those input ports still need to be connected and can be assigned a default value in .tdf file.

Best regards,
Sheng

p/s: If any answer from the community or Intel support are helpful, please feel free to give Kudos.