The Intel® Agilex™ device drives AS_CLK to the serial flash device. An internal oscillator or the external clock that drives the OSC_CLK_1 pin generates AS_CLK. Using an external clock source allows the AS_CLK to run at a higher frequency. If you provide a 25 MHz, 100 MHz, or 125 MHz clock to the OSC_CLK_1 pin, the AS_CLK can run up to 133 MHz.
Set the maximum required frequency for the AS_CLK pin in the Intel® Quartus® Prime software as described in Active Serial Configuration Software Settings. The AS_CLK pin runs at or below your selected frequency.
|Configuration Clock Source||AS_CLK Frequency (MHz)|
|OSC_CLK_1 (25/100/125 MHz)||