XAUI v8.1 and earlier - Data errors occur when Virtex-5 GTX RocketIO is used during asynchronous operation

AR#	32539	Search For Another Answer
Topic	IP-DS-XAUI
Last Updated	04/23/2009
Status	Active

Description

Keywords: Virtex-5 FXT, clock correction, RXDATA, RXCLKCORCNT, error

Xilinx has determined that the Clock Correction feature of the Virtex-5 GTX transceiver can cause data corruption on the Receiver when a clock correction sequence is skipped or added. The XAUI core is effected by this issue because it must use a clock correction sequence length of 1 byte to adhere to the IEEE 802.3 standard.

Solution

To work around this issue, it is possible to either use synchronous clocking or a fabric clock correction module. A full description of this issue and work-around is available in (Xilinx Answer 32164).