Microchip® Advanced Software Framework

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Human interface on XMEGA-A3BU Xplained:

XMEGA USART used USARTC0 on J1 connector
Led 0 blinks when USB host has checked and enabled CDC interface
Led 1 is on when CDC port is open
Green LED close to USB connector is on during data transfer from CDC to UART
Red LED close to USB connector is on during data transfer from UART to CDC