Generate rate ports for variable-rate CIC filter
Do not generate rate ports.
ports. When the
load_rate signal is asserted, the
rate port loads in a rate factor.
AddRatePort is specifically for use with
variable rate CIC filters. A variable rate CIC filter has a programmable
rate change factor. It is assumed that the filter is designed with
the maximum rate expected, and that the Decimation Factor (for CIC
Decimators) or Interpolation Factor (for CIC Interpolators) is set
to this maximum rate change factor.