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# 22249

8.1i CPLD NGDBuild - "ERROR:NgdBuild:423 - The CLK_DIV4 symbol is not supported in the acr2 architecture"

Description

General Description: 

When implementing a design targeting the Automotive CoolRunner-II family, I receive an error message similar to the following: 

 

"Checking timing specifications ... 

Checking expanded design ... 

ERROR:NgdBuild:423 - The CLK_DIV4 symbol "XLXI_1" is not supported in the acr2 

architecture. Please check the Libraries Guide in order to pick an 

appropriate component. If this design was synthesized, try targetting the 

synthesis to the current architecture."

Solution

NGDBuild fails to recognize Clock Divider components as valid components in this device.  

 

This problem has been fixed in the latest 8.1i Service Pack available at: 

<http://www.xilinx.com/xlnx/xil_sw_updates_home.jsp>
The first service pack containing the fix is 8.1i Service Pack 1.

AR# 22249
Date Created 09/04/2007
Last Updated 05/19/2014
Status Archive
Type General Article