7 Power Supplies
The following table defines the power supply rails of the PIC32CZ CA70/MC70 family of devices.
| Name | Associated Ground | Description | Voltage Range (Electrical Specifications Parameters Number) |
|---|---|---|---|
| VDDCORE | GND | Powers core, embedded memories and peripherals. | REG_31 |
| VDDIO | GND | Powers peripheral I/O lines (Input/Output Buffers), backup part, 1 Kbytes of backup SRAM, 32 kHz Crystal oscillator, oscillator pads. For USB operations, VDDIO voltage range must be between 3.0V and 3.6V. | REG_33 |
| VDDIN | GND, AVSS | Voltage regulator input. Supplies also the ADC, DAC, and analog voltage comparator. | REG_34 |
| VDDPLL | GND, GNDPLL | Powers PLLA and the fast RC oscillator. Must be at VDDCORE level. | REG_37 |
| VDDPLLUSB | GNDPLLUSB | Powers UTMI PLL and 3 MHz to 20 MHz oscillator. | REG_40 |
| VDDUTMII | GNDUTMI | Powers USB transceiver interface. Must be connected to VDDIO. | REG_39 |
| VDDUTMIC | GNDUTMI | Powers USB transceiver core. | REG_38 |
| VDDOUT | - | Voltage Regulator Output | REG_35 |
Important:
- VDDIN and VDDIO must have the same level.
- VDDIN and VDDIO must always be higher than or equal to VDDCORE.
- VDDCORE, VDDPLL, and VDDUTMIC voltage levels must not vary by more than 0.6V.
- For the USB to be operational, VDDUTMII, VDDPLLUSB, VDDIN, and VDDIO must be higher than or equal to 3.0V.