Atmel ATxmega128A1U microcontroller
Embedded debugger (EDBG)
USB interface
Programming and debugging on board XMEGA® through PDI
Virtual COM-port interface to target via UART
Atmel Data Gateway Interface (DGI) to target via USART and TWI
Four GPIOs connected to target for code instrumentation
Digital I/O
Two mechanical buttons (user and reset button)
One user LED
Three extension headers
Xplained Pro LCD extension connector
Three possible power sources
External power
Embedded debugger USB
Target USB
32kHz crystal
External 512KB SRAM
USB interface, device mode