Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 7/19/2024
Public

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A.2.6.8. Clocks

The QSPI controller uses an input clock called qspi_ref_clk. The qspi_clk output clock to the Flash device is derived by dividing down the qspi_ref_clk clock by the baud rate divisor field (bauddiv) of the cfg register.

The value of the qspi_ref_clk is determined by the SDM based on the desired active serial (AS) configuration clock value you selected in Intel Quartus® Prime.