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Altera_Forum
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10 years ago

Cyclone IV unused input in 3.3V bank tied to +1.2V

We're using the Cyclone IV EP4CE15 device in a 256-pin package. This package allows migration to the next larger device (EP4CE22), but the larger device has more VCCINT and GND pins. This requires ty...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

VCCINT are power pins (Not I/O) and must be connected to 1.2V. You can leave unused I/O pins floating as you are doing for EP4CE15. Refer to Cyclone IV Device family pin Connection Guidelines.