+                       #elif (defined(__AVR_ATxmega128C3__) || defined(__AVR_ATxmega64C3__) || \
+                              defined(__AVR_ATxmega192C3__) || defined(__AVR_ATxmega256C3__) || \
+                                  defined(__AVR_ATxmega384C3__))
+                               #define USB_SERIES_C3_XMEGA
+                               #define USB_CAN_BE_DEVICE
+                       #elif (defined(__AVR_ATxmega16C4__) || defined(__AVR_ATxmega32C4__))
+                               #define USB_SERIES_C4_XMEGA
+                               #define USB_CAN_BE_DEVICE