UPF: set_isolation -domain <>; What exactly is the option "-domain" represent

[ValenceBaand]

I get confused with the "-domain" option in set_isolation and set_levelshifter as to what the "-domain" is for ? Are we indicating where the ISO cell (in which domain) it has to be placed ?

Isn't it obvious that (a) ISO cell should be placed in sink domain for an output coming from an ON-OFF block (in other words at the inputs of the AON block or at the inputs of more AON blocks). (b) When it comes to ports, it is at the default domain of the port (in other words set_related_supply_net of the concerned port).

 

[ThisIsNotSam]

You can still have multiple always on domains, so yes, you have to say which domain you mean to have an ISO cell on.