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# 18373

Virtex-II Pro - Figure 4-5 in the User Guide (v2.4) is missing pull-ups on the TDO lines.

Description

In the User Guide for Virtex-II Pro (v2.4), page 287 says that TDO has no internal pullup and that a recommended value of 200 Ohms external pullup should be used on TDO. 

http://direct.xilinx.com/bvdocs/userguides/ug012.pdf
 

However, this pull-up is not shown in Figure 4-5 on pg 290. So, should the pull-ups be used?

Solution

Yes. There pull-ups should be shown on the TDO lines in figure 4-5 of the Virtex-II Pro User Guide.

AR# 18373
Date Created 09/03/2007
Last Updated 05/08/2014
Status Archive
Type General Article