Atmel ATmega324PB microcontroller
Embedded debugger (EDBG)
USB interface
Programming and debugging (target) through JTAG
Virtual COM-port interface to target via UART
Atmel Data Gateway Interface (DGI) to target via synchronous SPI or 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
Two possible power sources
External power
Embedded debugger USB
16MHz crystal
32kHz crystal footprint