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

ID 683122
Date 3/28/2022
Public

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2.9.6.2. 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.