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AR# 33019

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


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


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
  • Spartan-6 LX
  • Spartan-6 LXT
  • ISE Design Suite - 11.1
  • ISE Design Suite - 11.2
  • ISE Design Suite - 11.3
  • ISE Design Suite - 11.4
  • Digital Clock Manager (DCM) Module