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Altera_Forum
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9 years ago

About unused pins of CycloneIV

Hi: I found the states on cyclone® iv device family pin connection guidelines. It says "The unused pins must be connected as specified in the Quartus II software settings. The default Qu...
Altera_Forum's avatar
Altera_Forum
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9 years ago

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Does it mean designer is allowed to leave all the unused pins open/unconnected on PCB and keep above setting in quartus II?

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Yes, it's the usual way to deal with unused pins. Unused pins that should be connected to ground are the Cyclone III/IV clock pins that don't have a weak pull-up.