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Altera_Forum
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16 years ago

unused pin and Quartus option set

In the cyclone iii Pin Connection Guidelines, some types unused pins are recommended to connnect to VCCIO, and some are recommended to connnect to GND. I have two questions: 1. Which option shoul...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Choosing ''As input tri-stated with weak pull-up'' should be ok. That's the Quartus standard. With this setting, you don´t need to connect these pins to GND or VCCIO. Well, I've never done that.

But make sure the MSEL pins are connected to GND or VCCA on the PCB, according to your configuration scheme.

I´ve never seen different options for different unused pins. It´s a common setting in Quartus fot the entire FPGA.

Success, Ton