SAM E54 Xplained Pro has a USB Micro-AB connector for use with the SAM E54 USB module labeled TARGET USB on the kit. To be able to detect when a target USB cable is connected in self-powered mode, a GPIO is used to detect the VBUS voltage on the connector. The USB ID is connected to a power switch, which will automatically enable power to the USB port if a device cable is detected. The USB ID signal is connected to PC19, which can force power from the kit to the USB connector by driving PC19 low. It is not possible to override and disable the power if a device is connected as the device cable will short the USB ID to ground.
| SAM E54 pin | USB function |
|---|---|
| PC00 | VBUS Detection |
| PC19 | USB ID |
| PA24 | USB D- |
| PA25 | USB D+ |