FFT Compiler Page 1 of 3 Home > Products > Intellectual Property > Lattice IP Cores > FFT Compiler FFT Compiler Overview Lattice's FFT Compiler offers forward and inverse Fast Fourier Transforms for point sizes from 64 to 16384. This IP core can be configured to perform forward FFT, inverse FFT (IFFT) or port selectable forward/inverse FFT. The FFT compiler offers two choices of implementation: high performance (Streaming I/O) and low resource (Burst I/O). In the high performance implementation, the FFT IP core can perform real-time computations with continuous data streaming in and out at clock rate. There can also be arbitrary gaps between data blocks allowing discontinuous data blocks. The low resource implementatio can be used when it is required to use lesser slices (logic unit of Lattice FPGA devices) and EBR (Embedded Block RAM) resources or if the device is too small to accommodate the high performance version. To account for the data growth in fine register length implementations, the FFT compiler allows one of three fixed scaling or dynamic scaling after each radix-2 stage of the FFT computation. The low resource version also supports block floating point arithmetic that provides increased dynamic range for intermediate computations. The FFT comp also allows the number of FFT points to be varied dynamically through a port. Features Wide range of points sizes: 64, 128, 256, 512, 1024, 2048, 4096, 8192, and 16384 Choice of high-performance (streaming I/O) and low resource (burst I/O) versions Run-time variable FFT point size Forward, inverse or port-configurable forward/inverse transform modes Choice of no scaling, fixed scaling (RS111/RS211) and dynamically variable stage-wise scaling Data precision of 8 to 24 bits Twiddle factor precision of 8 to 24 bits Natural order for input and choice of bit-reversed or natural order for output Support for arbitrary gaps between input data blocks in high-performance realization Block floating point scaling support in low resource configurations Performance and Resource Utilization1 1 LatticeECP3 # Points Operating mode SLICEs LUTs Registers sysMEM EBRs sysDSP Blocks fMAX(MHz) 64 Low Resource 493 668 727 3 2 285 http://www.latticesemi.com/products/intellectualproperty/ipcores/fftcompiler.cfm 10/11/2011 FFT Compiler Page 2 of 3 # Points Operating mode SLICEs LUTs Registers sysMEM EBRs sysDSP Blocks fMAX(MHz) 64 High Performance 733 1433 1174 1 2 243 256 Low Resource 575 821 783 3 2 255 256 High Performance 1065 2074 1636 3 3 266 1024 Low Resource 653 964 820 3 2 254 1024 High Performance 1329 2602 2056 6 4 261 8192 Low Resource 722 1089 870 18 2 258 8192 High Performance 1957 3843 2762 21 6 229 1. Performance and utilization data are generated targeting a LFE3-95E-8FN672CES device using Lattice Diamond 1.0 and Synpl Pro D-2009.12L-1 software. Performance may vary when using a different software version or targeting a different device densit or speed grade within the LatticeECP3 family. 1 LatticeECP2M # Points Operating mode SLICEs LUTs Registers sysMEM EBRs sysDSP Blocks fMAX(MHz) 64 Low Resource 534 681 730 3 1 286 64 High Performance 989 1437 1174 1 2 243 256 Low Resource 616 830 789 3 1 292 256 High Performance 1419 2070 1636 3 3 266 1024 Low Resource 718 991 839 3 1 273 1024 High Performance 1782 2618 2056 6 4 261 8192 Low Resource 787 1123 897 18 1 234 8192 High Performance 2518 3867 2762 21 6 229 1. Performance and utilization data are generated targeting a LFE2M-35E-7F672C device using Lattice Diamond 1.0 and Synplify Pro D-2009.12L-1 software. Performance may vary when using a different software version or targeting a different device densit or speed grade within the LatticeECP2M family. LatticeECP21 # Points Operating mode SLICEs LUTs Registers sysMEM EBRs sysDSP Blocks fMAX(MHz) 64 Low Resource 499 608 695 3 1 283 64 High Performance 723 1435 1174 1 2 283 256 Low Resource 578 745 755 3 1 250 256 High Performance 1049 2078 1636 3 3 250 1024 Low Resource 666 894 804 3 1 258 1024 High Performance 1324 2626 2056 6 4 258 8192 Low Resource 787 1123 897 18 1 240 8192 High Performance 1952 3880 2762 21 6 240 http://www.latticesemi.com/products/intellectualproperty/ipcores/fftcompiler.cfm 10/11/2011 FFT Compiler Page 3 of 3 -2009.12L-1 software. Performance may vary when using a different software version or targeting a different device density or speed grade within the LatticeECP2 family. LatticeECP/EC1 # Points Operating mode SLICEs LUTs Registers sysMEM EBRs sysDSP Blocks fMAX(MHz) 64 Low Resource 488 588 705 3 1 213 64 High Performance 998 1444 1174 1 2 208 256 Low Resource 575 732 772 3 1 212 256 High Performance 1424 2060 1636 3 3 200 1024 Low Resource 702 957 861 5 1 192 1024 High Performance 1781 2589 2056 7 4 182 8192 Low Resource 769 1055 913 36 1 189 8192 High Performance 2579 3950 2762 38 6 179 1. Performance and utilization data are generated targeting a LFECP33E-5F672C device using Lattice Diamond 1.0 and Synplify P D-2009.12L-1 software. Performance may vary when using a different software version or targeting a different device density or speed grade within the LatticeECP family. LatticeXP21 # Points Operating mode SLICEs LUTs Registers sysMEM EBRs sysDSP Blocks fMAX(MHz) 64 Low Resource 534 681 730 3 1 261 64 High Performance 989 1437 1174 1 2 243 256 Low Resource 616 830 789 3 1 226 256 High Performance 1419 2070 1636 3 3 266 1024 Low Resource 718 991 839 3 1 237 1024 High Performance 1782 2618 2056 6 4 261 1. Performance and utilization data are generated targeting a LFXP2-17E-7F484C device using Lattice Diamond 1.0 and Synplify D-2009.12L-1 software. Performance may vary when using a different software version or targeting a different device density or speed grade within the LatticeXP2 family. Ordering Information Family LatticeECP3 LatticeECP2M LatticeECP2 LatticeECP/EC LatticeXP2 Part Numbers FFT-COMP-E3-U2 FFT-COMP-PM-U2 FFT-COMP-P2-U2 FFT-COMP-E2-U2 FFT-COMP-X2-U2 IP Version: 2.6 Evaluate: To download a full evaluation version of this IP, go to the IPexpress tool and click the IP Server button in the toolbar. All LatticeCORE IP cores and modules available for download will be visible. For more information on viewing/downloading IP please read the IP Express Quick Start Guide. Purchase: To find out how to purchase the IP Core, please contact your local Lattice Sales Office. http://www.latticesemi.com/products/intellectualproperty/ipcores/fftcompiler.cfm 10/11/2011