Re: PIC16F18446 Curiosity Nano board & external power
☄ Helpfulby judd 2020/05/17 02:43:29
1) The board can be powered from any 5V USB supply, and works within the the range of the USB specification. The variable voltage supply that powers the PIC16F18446 is based on an LDO and the max voltage applied to the PIC16F18446 is always slightly lower than the USB voltage (the voltage can be set through project settings -> PKOB nano -> "Power" from the "options categories" menu. The voltage defaults to 3.3V, and any voltage set through MPLAB X is remembered, even through a power toggle.
2) Connecting VOFF to GND disables the on-board variable voltage supply that powers the PIC16F18446, it is only required if you intend to connect your own external power supply directly to the "VTG" pin on the board. It is not needed when a phone / wall power supply is used through the USB connector.