Description
The assignment for the PCI I/O clamp diode is called PCI I/O in the Quartus® II software.
Resolution
You can enable or disable internal PCI clamp diode using either of methods:
- In .qsf file: Add the command: set_instance_assignment –name PCI_IO ON –to input_pin_name
- In Assignment editor: Assignment Name – select PCI I/O; Value – Select On
The internal PCI clamp diode will be enabled and it will be showed in compilation report.