22.214.171.124.3. CONF_DONE and INIT_DONE
Previous device families implement the CONF_DONE and INIT_DONE pins as open drains with a weak internal pull-up. The CONF_DONE signal indicates that the configuration bitstream is received successfully. The INIT_DONE pin indicates that the device operates within the design.
In the current implementation, you cannot wire an Intel® Agilex™ CONF_DONE or INIT_DONE signal with the nSTATUS signal from previous device families. Otherwise, CONF_DONE and INIT_DONE behave as these signals behaved in earlier device families. If you assign CONF_DONE and INIT_DONE to SDM_IO16 and SDM_IO0, weak internal pull-downs pull these pins low at power-on reset. Ensure you specify these pins in the Intel® Quartus® Prime Software or in the Intel® Quartus® Prime settings file, (.qsf). CONF_DONE and INIT_DONE are low prior to and during configuration. CONF_DONE asserts when the device finishes receiving configuration data. INIT_DONE asserts when the device enters user mode.
CONF_DONE and INIT_DONE are optional signals. You can use these pins for other functions that the Intel® Quartus® Prime Pro Edition Device and Pin Options menu defines.