FFT IP Core: User Guide

ID 683374
Date 11/06/2017
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3.4.2.5. Dynamically Changing the FFT Size

The FFT stalls the incoming data (deasserts the sink_ready signal) until all the FFT processes and transfers all of the previous FFT frames of the previous FFT size to the output.
Figure 14. Dynamically Changing the FFT Size
Change the size of the incoming FFT,