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Altera_Forum
Honored Contributor
Honored ContributorSelectable 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_ForumHonored Contributor
Honored ContributorAnother way to approach this...
On Cyclone II, you can send a 3.3V LVTTL signal into an I/O bank that's connected to 1.8V (or 2.5V). Make sure the PCI clamping diode is turned off, and be aware that the leakage current will be higher than spec (you're overdriving the input buffer, after all), but it should all work fine.
