Is that the function of VCCIO? (I would guess so, setting the voltage of the IO pins). Have you checked in the data sheet that that's what that pin does?
If so, your assumption is most probably correct.
Is that the function of VCCIO? (I would guess so, setting the voltage of the IO pins). Have you checked in the data sheet that that's what that pin does?
If so, your assumption is most probably correct.