5.1.8 AV_CC

AV_CC is the supply voltage pin for the A/D Converter, PC[3:0], and PE[3:2]. It should be externally connected to V_CC, even if the ADC is not used. If the ADC is used, it should be connected to V_CC through a low-pass filter. Note that PC[6:4] use digital supply voltage, V_CC.