Can I use the Vdd1 and Vdd2 for other circuits on the board and if so what
currents are available ?
Vddx supplies were never intended to supply power to other external circuits
outside of allowing for external pypass capacitors and providing bias for the
external pull-ups. We did not have enough extra capacity to provide a well
regulated external supply of more than a few mA so that that mode of operation
is not supported.