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FFT sink_ready goes to x after reset deasserted

PFDesigner
Beginner
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I have generated a 512 point fft and am attempting to run the simulation for the block,

 

When reset goes high, the sink_ready signal goes to an unkown instead of a 1 as expected. 

 

Is there a minimum number of reset cycles that must occur in order to make this work properly?

 

I have added screen shots here to show the simulation output.

PFDesigner_0-1635941011815.png

 

 

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