UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 31508

Virtex-5 GTP RocketIO - TXKERR and TXRUNDISP meaning for a 2-byte interface

Description

This answer record describes the differences in meaning of TXKERR and TXRUNDISP between their use in the User's Guide and their use in hardware for a 2-byte transmit interface.

Solution

The bytes TXKERR[1:0] and TXRUNDISP[1:0] refer to are reversed in the GTP RocketIO User's Guide when the a 2-byte interface is used. TXKERR[1] indicates an invalid K character code was specified on TXDATA[7:0], and TXKERR[0] indicates the same for TXDATA[15:8]. TXRUNDISP[1] shows the current running disparity for the byte in TXDATA[7:0] and TXRUNDISP[0] for TXDATA[15:8].

AR# 31508
Date Created 08/20/2008
Last Updated 12/15/2012
Status Active
Type General Article