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AR# 20293

Virtex-II Pro RocketIO - How do I pre-determine the disparity for TX, as in the case of Fiber Channel?

Description

How do I calculate the disparity ahead of time, in case it needs to be controlled by the TXCHARDISPVAL and TXCHARDISPMODE?

Solution

On the TX side, you can use TXCHARDISPMODE and TXCHARDISPVAL to set the disparity (negative) for certain applications.

The following link downloads code from Xilinx that calculates the disparity ahead of time, so that you can control the disparity of TXDATA by TXCHARDISPVAL and TXCHARDISPMODE, as required:

http://www.xilinx.com/txpatches/pub/applications/refdes/disp.zip

AR# 20293
Date Created 09/03/2007
Last Updated 12/15/2012
Status Active
Type General Article