3.3 Power Supply

The debug circuitry is powered by the USB connector closest to the PS LED. If target programming or debugging is required, power must be provided to the debug circuitry. The target processor can be powered through either of the two USB connectors. The USB specification allows the USB connector voltage to vary between 4.4V-5.25V. The Curiosity Nano+ Touch contains two regulators for generating 3.3V for the debugger and an adjustable regulator for the target.

The following figure shows the power supply system on the PIC32CM LS00 Curiosity Nano+ Touch Evaluation Kit.