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Shadow copy vs Active copy implementation in RAL

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i am looking for a solution to implement a RAL which supports both shadow coy and active copy as used by RTL.


Basically when a write happens to a particular register, the shadow copy gets updated and based on another register write (update) the shadow copy becomes the active copy.


In RTL, the registers are stored in two different signals and is assigned based on the extra signals which gets asserted based on the update.


please share some thoughts on implementing same.

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