What is the assignment for the PCI I/O clamp diode in the Quartus II software? - What is the assignment for the PCI I/O clamp diode in the Quartus II software? 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. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Cyclone® II FPGAs'] ['novalue'] ['novalue'] ['novalue']