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AR# 20709

LogiCORE xFFT v3.1 Patch - Release Notes/README


General Description:
This Answer Record contains the Release Notes for the COREGen xFFT v3.1 Patch.


Patch Install Instructions for 6.3.03i IP Update #4

1. Before you install this patch, ensure that you have the following installed on your machine:
If you need any of the service packs, libraries, or IP Updates, you can obtain them from the Download Center at:

A. ISE 6.3i
B. ISE Service Pack 3
C. COREGen 6.3i IP Update #4
A. MXE 5.8c
B. MXE 5.3c Libraries for 6.3i Service Pack 3
C. MXE 5.8c 6.3i IP Update #4 libraries

2. Download the xFFT v3.1:

3. Download the MXE Libraries with xFFT patch:

4. Extract the "xfft_v3_1_patch_for_6_3i.zip" to your %XILINX% install directory.

5. Extract the "xfft_v3_1_patch_mxe_libraries_5.8c.zip" file(s) to the $MODELSIM install directory (e.g.,: C:\Modeltech_XE\).

Patch Install Instructions for ISE 7.1i

This patch is available in ISE 7.1i IP Update 1 and above.

You should install the following:
1. The latest IP Update for ISE 7.1i
2. The latest Service Pack for ISE 7.1i

These can be obtained from the Download Center:

Patch Fixes
Burst mode Virtex-4 Post-PAR simulation mismatches. See (Xilinx Answer 20710).

Virtex-4, Radix-4 Burst I/O, with unscaled arithmetic FFT generate will not generate. See (Xilinx Answer 20713).

xFFT does not respond to the Start pulse even when CE is High, unless the SCLR is toggled. See (Xilinx Answer 20714).

Known Issues
Streaming I/O mode might occasionally have memory collisions. See (Xilinx Answer 20717).

Virtex-4 speed numbers in the datasheet are incorrect. See (Xilinx Answer 21453).
AR# 20709
Date 12/15/2012
Status Active
Type General Article
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