+                               #define USB_CAN_BE_HOST
+                       #elif (defined(__AVR32_UC3B0512__) || defined(__AVR32_UC3B0256__) || \
+                              defined(__AVR32_UC3B0128__) || defined(__AVR32_UC3B064__))
+                               #define USB_SERIES_UC3B0_AVR
+                               #define USB_CAN_BE_DEVICE
+                               #define USB_CAN_BE_HOST
+                       #elif (defined(__AVR32_UC3B1512__) || defined(__AVR32_UC3B1256__) || \
+                              defined(__AVR32_UC3B1128__) || defined(__AVR32_UC3B164__))
+                               #define USB_SERIES_UC3B1_AVR
+                               #define USB_CAN_BE_DEVICE
+                               #define USB_CAN_BE_HOST
+                       #endif
+                       
+                       #if (defined(USB_CAN_BE_DEVICE) && defined(USB_CAN_BE_HOST))
+                               #define USB_CAN_BE_BOTH
+                       #endif
+
+                       #if defined(USB_HOST_ONLY)
+                               #if !defined(USB_CAN_BE_HOST)
+                                       #error USB_HOST_ONLY is not available for the currently selected microcontroller model.
+                               #else
+                                       #undef USB_CAN_BE_DEVICE
+                                       #undef USB_CAN_BE_BOTH
+                               #endif