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Problem with DCM in Virtex 2 pro when it is downloaded onto FPGA

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uckingcu

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hi i am using the dcm in virtex 2 pro fpga..i have an i/p of 100mhz clk and i want 125mhz clk. the problem is when i simulate it is working fine but it is failing when downloaded onto fpga.i could not get 125mhz clk. so can anyone give me suggestions

thank u
 

echo47

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DCM in virtex 2 pro

It should work fine. What did you get instead of a 125 MHz clock?
If you can show us a small project that demonstrates the problem, maybe someone can hep you debug it.
Also say which tools you used.
 

eziggurat

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Re: DCM in virtex 2 pro

Have you actually setup the generics or parameters correctly such as fx, multiply and divide correctly?
 

uckingcu

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Re: DCM in virtex 2 pro

I specified all the parameters...i am using xilinx ise 7.1 with sp4..the post synthesis simulation is working but when downloaded onto chip it is not working..i mean i am not getting any output at the clockfx on the board..but i am getting clk0 output
 

eziggurat

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Re: DCM in virtex 2 pro

Have you set clkfx buf to true? Also could send the code snippet of the DCM instantiation.
 

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