Generally we see that Isolation is required b/ OFF to ON block. But in some design isolation cells are inserted b/w ON to OFF(More correct to say standby) block as well. This is called as Parking .
This is required for some signals which are having many load in OFF(Standby) block. i.e clock/reset. This will insure that clock/reset does not toggle when domain is in OFF(Standby) state. And which in turn will prevent switching/toggling of many sequential elements in shutdown domain . And hence we can reduce power consumption.
This is required for some signals which are having many load in OFF(Standby) block. i.e clock/reset. This will insure that clock/reset does not toggle when domain is in OFF(Standby) state. And which in turn will prevent switching/toggling of many sequential elements in shutdown domain . And hence we can reduce power consumption.
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