Intel® Quartus® Prime Standard Edition User Guide: Third-party Synthesis

ID 683796
Date 9/24/2018
Public
Document Table of Contents

1.9.6.3. altera_io_opendrain

Use the altera_io_opendrain attribute to specify open-drain mode I/O ports. This attribute applies a boolean data type value to outputs or bidirectional ports for devices that support open‑drain mode.