The resampling process requires input data samples to be “reused” in a computation of multiple output samples, as per the TP_INTERPOLATION_FACTOR/TP_DECIMATION_FACTOR configuration. Because a given input data sample might be required by more than one output path, but not all the output paths, it is not possible to create efficient data distribution connections that would take advantage of extra resources without fully decomposing into Interpolation Polyphases and Decimation Polyphases fist .
Therefore, Resampling only supports TP_SSR mode when TP_PARA_INTERP_POLY = TP_INTERPOLATION_FACTOR and TP_PARA_DECI_POLY = TP_DECIMATION_FACTOR.