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AR# 53538

LogiCORE IP DisplayPort v3.2 - Why does the DisplayPort Sink IIC Controller hold the SCL line in some cases when large amounts of noise are introduced into it via the AUX channel input?

Description

Why does the DisplayPort Sink IIC Controller hold the SCL line in some cases when large amounts of noise are introduced into it via the AUX channel input?

In some cases, it has been observed that noise introduced through the DisplayPort cable can cause the DisplayPort Sink IIC Controller to become stuck and the SCL to be held low.

Solution

An automatic reset has been added to the DisplayPort Sink IIC Controller state machine in case this condition is observed.

This fix will be available in the next version of the LogiCORE DisplayPort core.

If you need a patch for the DisplayPort v3.2, please contact Xilinx Technical Support.

http://www.xilinx.com/support/techsup/tappinfo.htm

Please see (Xilinx Answer 33258) for a detailed list of LogiCORE IP DisplayPort Release Notes and Known Issues.

Linked Answer Records

Master Answer Records

AR# 53538
Date Created 12/17/2012
Last Updated 08/26/2014
Status Active
Type General Article
IP
  • DisplayPort