The SEM IP GUI for all supported families (6 Series, 7 Series, Zynq, UltraScale, UltraScale+) specifies a minimum clk frequency of 8 MHz.
Can a user run the SEM IP at a lower frequency than this?
The user-specified clock frequency impacts two things in the generated SEM IP:
If a user wants to use a frequency lower than 8 MHz, they can generate the IP targeting 8 MHz.
When doing so, please be aware of the following:
The customer should review the SEM IP Product Guide to understand how to calculate a new V_ENABLETIME for their desired clock frequency and baud rate, as well as to calculate the rounding error to determine if it is within tolerance.
These equations are provided in the IP Product Guide.