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Altera_Forum
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17 years ago

Selectable LVTTL Inputs - Cyclone II

Hello All, I recently discovered this forum and very excited about the wealth of information it contains. Anyway, I have what might be considered a novice question. I'm hoping to find th...
Altera_Forum's avatar
Altera_Forum
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17 years ago

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Also, I think the VCCIO pins might be tied to 3.3V on the custom board I'm using, will this make it incompatable to read 1.8V LVTTL?

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The device handbook will answer that question. Compare the VIH min that you think you will actually have to the requirement for the I/O standards that use VCCIO set to 3.3V.