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

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

Use the altera_io_powerup attribute to define the power-up value of an I/O register that has no set or reset. This attribute applies a string value (high|low) to ports with I/O registers. By default, the power-up value of the I/O register is set to low.