3.4.2 Xplained Pro Power Header
The power header can be used to connect external power to the ATmega4809 Xplained Pro kit. The kit automatically detects and switches to an external power source, if supplied. The power header can also be used to supply power to external peripherals or extension boards. Ensure that the total current does not exceed the recommended current limit of the on-board regulator when using the 3.3V pin.
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | VEXT_P5V0 | External 5V input pin |
| 2 | GND | Ground pin |
| 3 | VCC_P5V0 | Unregulated 5V pin (an output, derived from one of the input sources) |
| 4 | VCC_P3V3 | Regulated 3.3V pin (an output, used as the main power supply for the kit) |