QI would like to know if it is OK to change the Viso pin 16 while the chip is
powered (changing from 3.3 V to 5 V secondary voltage, controlled from the
primary side using one of the internal channels). It would help powering /
un-powering a uC with limited pin count using its BOD.
AThe ADuM5402 when power is OK to change Vsel to make the Viso go from 3.3V to
5V. You do need to have 5V VDD1 to do this, since 3.3V VDD1 to 5V Viso is not
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