Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Max V output pin in a disconnected mode on logic 1

I'm using Max V dev kit for basic logic gate design. No clocking or anything. Logic part works fine. On logic 1 / high I would like the output pin to be floating / disconnected. Right now it pr...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

grips03,

electrically, the output does not achieve perfect floating (infinite impedance) but only a large impedance.

Thus, if nothing else is driving the line, you'll still see some kind of voltage on the line, which will depend on the output driver design and internal states.