7.2.1 Power Supplies

The PIC32CK SG/GC has the following power supply pins:

• AVDD – Powers the backup power domain as well as the ADCs, Analog Comparator (AC), and the Peripheral Touch Controller (PTC).
• VDDREG – Powers internal regulators for the VDDCORE_SW, VDDCORE_RAM, and VDDCORE_USB power domains.
• VDDIO – Powers I/O lines, an External Crystal Oscillator (XOSC), the 48 MHz Digital Frequency Locked Loop (DFLL48), and two charge pumps which support the Analog Comparator (AC) and the ADCs on the device (ADC0-3 and PTC ADC). Most VDDIO pins also power the device's Flash panel through double bonding.
• VDDUSB3V – Powers USB ports on the device.

For decoupling recommendations for the different power supplies, refer to the schematic checklist.