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Altera_Forum's avatar
Altera_Forum
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10 years ago

VCCIO and IO standard difference

hi, I have cyclone IV GX Device, VCCIO of the bank is 3.3V. However, in Quartus project there 2.5V standard as input and output setting. There is basicly 4 signals in that bank, 2 inputs and 2 o...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

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So, basicly the question is where does the

IO standard has an effect in terms of

-output pin

-input pin ?

-Tero

--- Quote End ---

Hi Tero:

With the incorrect IO setting in quartus, the timing analyzer will not have the correct settings for the bank, and so your timing reports will be off. Also other cross checks will not be performed correctly (Like sso, input clamp warnings etc)

Pete