It seems that DCLK continues to be output even after AS configuration is completed. When accessing the configuration ROM using ASMI IP in user mode, which is used, clkin or DCLK input to IP?

During AS configuration, Internal Clock is used for DCLK, and clkin input to ASMI is used when accessing ROM via ASMI.
If nCSO is disabled when the clock is switched, it prevents the ROM from malfunctioning.

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Category: Configuration/Programming
Tools: Quartus® Prime
Device: Cyclone® IV