AR# 14667


4.2i iMPACT CPLD CoolRunner XPLA3 384XL - Device experiences functional failures after programming


Keywords: 4.1i, 4.2i, CPLD, XPLA3, XCR3384XL, failure, program

Urgency: Hot

General Description:
A CoolRunner XPLA3 384XL design simulates correctly, but the device fails to function properly.


A bug in iMPACT is causing the JEDEC to not be properly programmed into the device. This bug only affects the XPLA3 384 macrocell CPLD; all other densities are unaffected.

This has been fixed in the latest 4.2i Service Pack, available at:
The first service pack containing the fix is 4.2i Service Pack 3.

Alternatively, you may work around this problem by downloading the latest iMPACT programmer from the WebPACK site as follows:

1. Go to
2. Register if necessary, then select "Download ISE WebPACK".
3. Enter your log-in name and password.
4. Ensure that the Download Method is set to "Single File", and click on "Custom".
5. Ensure that the version is "4.2WP2.0".
6. Check only the CPLD Programmer box; then, click the "Download" button.
7. Click on each hyperlink to begin the download, and save all files in the same directory.
8. Run the installer executable to install.
AR# 14667
Date 08/06/2003
Status Archive
Type General Article
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