Serial RapidIO v5.1 - Buffer layer may corrupt single-cycle RX packets
Description
Under specific circumstances, the RX buffer layer provided with the Serial RapidIO v5.1 core may corrupt single-cycle packets. An example of a single-cycle packet could be a DOORBELL response.
The issue can occur when the RX buffer is close to empty, and the single-cycle packet enters the buffer from the PHY 2 clock cycles after the previous packet. The result is the single-cycle packet appears on the RX buffer output (toward the LOG layer) as corrupted or as a portion of a previous unrelated packet.
Solution
This issue will be fixed in the next core release. In the meantime, you can work around this issue by de-selecting the "Unified Clock" option on page 4 of the core's customization GUI.
If your design must use the "Unified Clock" option, please open a WebCase and refer to this Answer Record:
http://www.xilinx.com/support/clearexpress/websupport.htm
Revision History
01/21/2009 - Initial Release