- * When inserted, the JTAG port's TDI pin is read. If the pin is left high, the device will enumerate as a regular COM port on\r
- * the host, which can then be opened and data exchanged between the XMEGA and Host as if the XMEGA was connected directly to\r
- * the host's serial port. If the pin is pulled low, the device will enumerate as an AVRISP-MKII to the host, so that the XMEGA\r
- * can be reprogrammed by AVRStudio or other compatible software such as avrdude.\r
+ * When power to the board is applied, the TDI pin (pin 9) of the USB AVR's JTAG port is read. If the pin is left high, the device\r
+ * will enumerate as a regular COM port on the host, which can then be opened and data exchanged between the XMEGA and Host as if\r
+ * the XMEGA was connected directly to the host's serial port. If the pin is pulled low by shorting it to GND (pin 10), the device\r
+ * will enumerate as an AVRISP-MKII to the host, so that the XMEGA can be reprogrammed by AVRStudio or other compatible software\r
+ * such as avrdude.\r