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Altera_Forum's avatar
Altera_Forum
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18 years ago

Difference between VCCIO and VREF?

hi,everyone. i just start to use fpga cycloneIII,and i have a question which may be easy to answer. Thank you. question :is it right that VCCIO just supply the power?for example,if i want...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Be careful when using the VREF pins as fast I/O on the Cyclones, the VREF pins have a higher capacitance than the regular I/O pins.