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AR# 35676

LogiCORE Reed-Solomon Decoder v7.0 - Release Notes/README for Reed-Solomon Decoder v7.0 rev1 Patch for Spartan-6 Support


This Answer Record contains the Release Notes for the CORE Generator Reed-Solomon Decoder v7.0 rev 1 Patch which deals with the inability to target the core at Spartan-6 FPGA in ISE tools 12.1 as outlined in (Xilinx Answer 34852)


At present, the Reed Solomon Decoder is not supported in Spartan-6 FPGAin ISE tools 12.1. This is due to the block RAM issue as outlined in (Xilinx Answer 34541), Spartan-6 FPGA Block RAM Design Advisory - 9K block RAM Simple Dual Port (SDP) Port Width Restriction.
In order to target Spartan-6 FPGA, you need to install the patch described below:

1. Before you install this patch, ensure that you have the following installed on your machine.

NOTE: If you need any of the service packs, libraries, or IP Updates, you can obtain them from the Download Center at:


- ISE tools 12.1

2. Download the Reed Solomon Decoderv7.0 rev1 patch from:


3. Extract the ar35675_reed_solomon_decoder_v7_0_rev1.zip to a temporary directory so as to read the ar35675_reed_solomon_decoder_v7_0_rev1_readme.txt file for more information on whether to extract the zip file to %XILINX% installation directory or use MYXILINX environmental variable.

Patch Fixes

Issue: The core cannot be generated for Spartan-6 FPGA using ISE tools 12.1.

Symptom: The core is grayed out in CORE Generator.

Please see (Xilinx Answer 30176 ) for a detailed list of LogiCORE Reed-Solomon Decoder Release Notes and Known Issues.

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
30176 LogiCORE Reed Solomon Decoder - Release Notes and Known Issues N/A N/A

Associated Answer Records

Answer Number Answer Title Version Found Version Resolved
34852 LogiCORE Reed-Solomon Decoder v7.0 - Why does the RS Decoder cores (v7.0) not support Spartan-6 FPGA in 12.1? N/A N/A
AR# 35676
Date Created 05/28/2010
Last Updated 05/20/2012
Status Active
Type Known Issues
  • Reed-Solomon Decoder