Flexrio NI 7972 top level clock 100MHZ missing

[zyb1003]

Hello guys, 

I think the NI 7972 should have 40MHZ, 100MHZ, and 200MHZ top level clock for choice, but I can only see 40MHZ and 200 MHZ on the menu. 

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How can I let the system show 100MHZ?

Thanks

[Jacobson-ni · Accepted solution]

Right-click the FPGA target in the project and add a New > FPGA Base Clock. Once you add the 100MHz clock here you should be able to select that clock as the top level clock of the FPGA.