Forum Discussion

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

Detect high impedance on the input pin

Hi to all, for my little project, I need to manage the output pin of any FPGA placing them at high impedance. This is not a problem, I can do it with MAX10 and Cyclone IV. However I would ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

1) create a pattern on the driving Pin (clock, prbs, ...) and compare the input with the driving signal. If both are the same over some time the Pin is High Z.

2) you are more flexible with a FPGA Pin, and you know what you are driving (expected data), this depends on what you have available on you board.