clock and reset signals can be combined to create a clock domain.
Clock domains could be applied to some area of the design and then all synchronous elements instantiated into this
area will then implicitly use this clock domain.
Clock domain application work like a stack, which mean, if you are in a given clock domain, you can still apply another clock domain locally
Slow down the current clock to factor time
(Since version 1.3.0) Use copy instead of clone
(Since version SpinalHDL 1.2.3) misspelled method will be removed