A good entry point to CDC topic - from list of interesting documents explaining in depth CDC topics to gathering basic Clock domain crossing RTL modules, like:
▫️ IO debouncer
▫️ Simple synchronization thru 2 FFDs
▫️ Pulse synchronizer (with and w/o handshake)
▫️ Data bus synchronizer with recirculation mux
▫️ Asynchronous dual-clock FIFO (as submodule)

https://github.com/dpretet/cdc

#CDC #pulse #synchronizer #FF #fifo #SV #verilog
@ipcores