Slow Slew Rate

Hi @GD76

A slow slew rate reduces system noise, but adds a nominal output delay to rising and falling edges. The lower the voltage standard (for example, 1.8-V LVTTL) the larger the output delay when slow slew is enabled. Each I/O pin has an individual slew-rate control, allowing you to specify the slew rate on a pin-by-pin basis. The slew-rate control affects both the rising and falling edges. If no slew-rate control is specified, the Quartus software defaults to a fast slew rate.

For detailed functions, search for the keyword "Slew Rate" from the Device Handbook of each device and check.

Reference: https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/max-v/max5_handbook.pdf

Best Regards,
Richard Tan

p/s: If any answer from the community or Intel support are helpful, please feel free to give Kudos.