Before revision: A digital clock manager (DCM) is a function for manipulating clock signals by: 070804 xilinx.com Multiply and divide an incoming clock (DFS).
After revision: A digital clock manager (DCM) is a feature available on some FPGAs (notably ones produced by Xilinx), for manipulating clock signals by: 070804 xilinx.com Multipling or dividing an incoming clock (DFS).