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# 17227

5.2i CPLD CoolRunner-II iMPACT - Security bit improperly set for 64 macrocell device


Keywords: CPLD, CoolRunner-II, iMPACT, security, bit, XC2C64

Urgency: Hot

General Description:
iMPACT programs the incorrect bit pattern into the security address; consequently, the security bits are not properly set. As a result, third-party programmers do not recognize that the CoolRunner-II device is secured.


This problem is fixed in the latest 5.2i Service Pack, available at:
The first service pack containing the fix is 5.2i Service Pack 3.
AR# 17227
Date Created 09/03/2007
Last Updated 08/13/2009
Status Archive
Type General Article