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Altera_Forum
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15 years ago

I/O pins of “EP2C20Q240C8N”

I’m using “EP2C20Q240C8N” in my design .Therefore, I have been reading the “Cyclone II Device Handbook” and the “EP2C20_Pinout” page 2-59 “Each I/O bank has its own VCCIO pins. A single device can s...
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Altera_Forum
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15 years ago

As you reported, VREF pins are needed for voltage referenced I/O standards. The banks are further divided into four Vref-groups, you'll find the exact assingment in the pinout files. Because you're apparently not using voltage referenced standards, simply ignore the optional Vref function of these pins.

VCCIO pins must be completely connected to the respective bank voltage of your choice:

Optional pin functions are mostly set in the Quartus software, a few are implicitely set by using a particular I/O standard or configurations scheme.