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# 19794

6.2i/6.3i iMPACT - FPGA JTAG programming fails when the "Use HIGHZ Instead of BYPASS" preference option is set

Description

General Description:

When the 6.2i iMPACT "Use HIGHZ Instead of BYPASS" preference option is set, JTAG configuration fails for all but the last Spartan-II/-IIE/-3 or Virtex/-E/-II/-II Pro/-4 FPGA device in any multiple device JTAG chain. DONE does not go High, and the device(s) fails to start up.

- This problem does not affect configuration if the "Use HIGHZ Instead of BYPASS" preference option is not selected. (By default the "Use HIGHZ Instead of BYPASS" preference option is not selected.)

- This problem does not affect chains containing only a single device, and does not affect the last device in a multiple device chain.

Solution

To work around this issue when using 6.2i or 6.3i iMPACT, uncheck the "Use HIGHZ Instead of BYPASS" box under the iMPACT "Edit -> Preferences" pull-down menu.

This problem is fixed in the iMPACT 7.1i design tools release.

AR# 19794
Date Created 09/03/2007
Last Updated 12/15/2012
Status Active
Type General Article