+ #if (!defined(NO_INTERNAL_SERIAL) && \
+ (defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1287__) || \
+ defined(__AVR_ATmega32U6__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__) || \
+ defined(__AVR_ATmega32U2__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega8U2__)))