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< # Clock period of this object, with the default value being the
< # clock period of the parent object, unproxied at instantiation
< # time
< clock = Param.Clock(Parent.clock, "Clock speed")
---
> # The clock domain this clocked object belongs to, inheriting the
> # parent's clock domain by default
> clk_domain = Param.ClockDomain(Parent.clk_domain, "Clock domain")