User guide

System Generator for DSP Getting Started Guide www.xilinx.com 49
UG639 (v 14.3) October 16, 2012
Lesson 3 - System Control
Bursty Data
Several of the more complex DSP blocks offered in the Xilinx DSP blockset result in “bursty” data. For example, the
non-streaming FFT requires several clock cycles to process the input data prior to generating valid output data. In
these cases, these blocks include data flow control ports that must be used in the DSP system. These ports provide
basic push mode dataflow control. They consist of a vin port which indicates that valid data is available at the
inputs and vout which indicates that valid data is available at the outputs.