VID1/SEL
This pin selects SVI or PVI mode operation based on the
state of the pin prior to enabling the ISL6323B. If the pin is
LO prior to enable, the ISL6323B is in SVI mode and the
dual purpose pins [VID0/VFIXEN, VID2/SVC, VID3/SVD]
use their SVI mode related functions. If the pin held HI prior
to enable, the ISL6323B is in PVI mode and dual purpose
pins use their VIDx related functions to decode the correct
DAC code.