Altera FFT MegaCore Function Manuel d'utilisateur télécharger pdf (Page 36)

Example 3-2: FFT Buffered Burst Data Flow Simulation Waveform

clk

reset_n

sink_vaild

sink_ready

sink_sop

sink_eop

inverse

sink_real

sink_imag

source_real

source_imag

source_exp

source_ready

source_valid

source_sop

source_eop

-13609 -47729 271 31221 -21224

EXP3

EXP2

EXP1

EXP0

Related Information

Enabling the Streaming FFT on page 3-7

Burst

The burst I/O data flow FFT operates similarly to the buffered burst FFT, except that the burst FFT

requires even lower memory resources for a given parameterization at the expense of reduced average

throughput. The following figure shows the simulation results for the burst FFT. The signals

source_valid and sink_ready indicate, to the system data sources and slave sinks either side of the FFT,

when the FFT can accept a new block of data and when a valid output block is available on the FFT

output.

UG-FFT

2014.12.15

Burst

3-13

FFT IP Core Functional Description

Altera Corporation

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Altera FFT MegaCore Function Manuel d'utilisateur Page 36