Serial Flash Controller IP Clock Speed

Hello sir, The Serial Flash controller speed might be start from 20MHz up to 25MHz max. You can add a PLL IP to your system, the input clock of this PLL will be your clock source on board. Then, you can extract two clocks from PLL, one for the system (Nios II , and other IPs) with a value up to 100MHz (you can achieve higher speed, yet it would be hard to close timing). And the other clock is 25MHz to Serial Flash Controller IP. Thanks