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# 33019

Spartan-6 Clocking - DCM_CLKGEN Spread Spectrum Clock Generation Feature Support

Description

This Answer Record outlines support for the DCM_CLKGEN feature on Spartan-6 devices and in ISE software tools.

Solution

Beginning in the ISE 11.4 Design Tools version of the software, the Spread Spectrum feature of DCM_CLKGEN is fully supported. Along with software support, there is additional documentation in the Spartan-6 FPGA Clocking Resource User Guide, UG382. Also, Xilinx Application Note XAPP1065 - "Spread Spectrum Clock Generation in Spartan-6 FPGAs" is available.

Spread Spectrum cannot be used in versions of software earlier than ISE design tools 11.4 for Spartan-6 FPGAs.

Linked Answer Records

Associated Answer Records

AR# 33019
Date Created 06/22/2009
Last Updated 02/21/2013
Status Active
Type General Article
Devices
  • Spartan-6 LX
  • Spartan-6 LXT
Tools
  • ISE Design Suite - 11.1
  • ISE Design Suite - 11.2
  • ISE Design Suite - 11.3
  • ISE Design Suite - 11.4
IP
  • Digital Clock Manager (DCM) Module