internal DCM

Best to look that up on the Xilinx website.

Best regards,

Ben

Mahdi,

Start by learning the DCM basics (i.e. the DLL). Read XAPP132:

Once you have built this foundation, go to the Users Guide of the device family you wish to use. There will be a dedicated section on clock management. As an example, the Virtex-4 Users Guide (Chapter 2) has 50 pages on using the DCM. You are bound to find the information you need for your project by reading this material.

-David

Tell us more.

Are you using Xilinx? Do you have a dev board? Are you using VHDL or Verilog

In Xilinx you can use the Coregen wizard to generate what they call an .XCO file, or something like that. Input your clock frequency and click on the 2X output.

Actually I'm using altra fpga(flex10k family).But I'm also interested in xilinx. And I'musing VHDL. Best wishes, Mahdi

Can't help you there. DCM's are usually hardware specific. And I never heard of Altra although flex10K sounds familiar.

Brad Smallridge Ai Vision