Altera_Forum
Honored Contributor
Honored ContributorOpen drain pin assignment
Does anyone know how to make an output pin open drain? I made an open drain assignment to an output pin in the assignment editor, but Quartus ignores it.
Forum Discussion
Altera_ForumHonored Contributor
Honored ContributorThere is no setting to force Quartus to make an open-drain pin. However, as btwjinst said, Quartus can convert a tristate buffer with a '0' input to an open-drain automatically, if you enable "Auto Open-Drain Pins" and "Perform WYSIWYG Primitive Resynthesis" under Quartus Settings.
