Do you know how to reconfig the DFS of Spartan DCM at runtime

Do you know how to reconfigurate the DFS of Spartan DCM at runtime?

I would like to change the FXMULTIPLY AND FXDIVIDE in order to get different CLKFX at runtime. According to xilinx manual it's not possible.

But probabely smbd has just a good idea?

PS: a simple reload of the FPGA configuration is too slow...

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patcher
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Does the Spartan 3 have BUFGMUXes like the Virtex-II Pro? If so, you could it it differently alltogether... Use two DCMs to create the two clocks you want to switch between, and feed them into the two inputs of a BUFGMUX... then you could just chose the desired output clock by changing the select signal.... not sure what happens to attached logic during the switch, though...

cu, Sean

Reply to
Sean Durkin

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