Normally, IOREF is set with a restistor divider to half
IOVDD (normally 1V8). To make the board simpler, IOREF
was connected to core voltage.



Core voltage was adjusted between 0V59 and 0V83 V and operation
of the chips remained normal.

Leszek/bitfury, can this be done on the miner board also?
Reduces the wiring a bit.

intron