Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 11/27/2024
Public
Document Table of Contents

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 the Quartus® Prime software.