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AR# 24298

LogiCORE Turbo Product Code Encoder (TPC) v1.0 - Why must the reset be applied for the code to be changed?

Description

Why must the reset be applied for the code to be changed?

Solution

This is a known issue in the v1.0 of the TPC. 

 

If you do not apply a reset, when attempting to change the turbo code, the sync output and the encoded data will be incorrect after the code change is applied. 

 

If you hit a reset in the middle of processing a code block, you must flush the design with an entire block before the core can be used. If you do not flush the design, the first block out after a reset will be corrupt. However, if you process one code block completely and then perform a reset, you should be able to complete a code switch without having to flush one block. 

 

Refer to (Answer Record 24321) for details of a patch required for the TPC Encoder v1.0. 

 

For a detailed list of LogiCORE Turbo Product Code (TPC) Encoder Release Notes and Known Issues, see (Xilinx Answer 30179).

AR# 24298
Date Created 09/04/2007
Last Updated 05/21/2014
Status Archive
Type General Article