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Observer
Observer
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Registered: ‎06-07-2012

Best Way to obtain 4 internal clocks from 1 external clock

Spartan 6 device.

Incoming Clock is 1 mhz

Internally I need the 1 mhz clock, 1 mhz shifted by 45 degrees, 1 mhz shifter by 120 degrees and a 200 mhz clock.

Is the following the correct way to implement/ acquire the required clocks?

Use a BUFG to route external clock to CLKIN on DCM_A.

Route DCM_A CLK0  to CLKIN on DCM_B and use this DCM to acquire 45 degree shift.

Route DCM_A CLK0  to CLKIN on DCM_C and use this DCM to acquire 120 degree shift.

Route DCM_A CLK0  to CLKIN on DCM_D and use this DCM to multiply up to 200mhz.

Note - I used DCM_A, DCM_B, DMC_C, DCM_D to identify 4 different DCM blocks.

 

Thanks

 

 

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