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:[1]
  • 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.

See also

  • Clock signal
  • Delay-locked loop
  • Phase-locked loop