Digital clock manager

Updated on Oct 22, 2023

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A digital clock manager (DCM) is an electronic component available on some FPGAs (notably ones produced by Xilinx). A DCM is useful for manipulating clock signals inside the FPGA, and to avoid clock skew which would introduce errors in the circuit.

Uses of DCM

DCMs have the following applications:

Multipling or dividing an incoming clock (which can come for outside the FPGA or from a Digital Frequency Syntetizer [DFS]).

Making sure the clock has a steady duty cycle.

Adding a phase shift with the additional use of a Delay-locked loop.

Eliminating clock skew within an FPGA design.

References

Digital clock manager Wikipedia

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