ATXmega*A4U Breakout Documentation
Documentation for the ATXmega*A4U breakout boards:
- Pinout Diagram
- Eagle schematic (PDF) and board (PDF)
- Crystal is 16MHz (Digikey part)
- R2 and R3 are available for a 2:1 voltage divider to take VUSB to trigger PD5 in self-powered applications
Atmel Studio 6 supports these chips fully, and includes their Framework for building applications.
You will need a programmer capable of PDI, which includes the AVR-ISP MkII and the JTAG-ICE MkII. I plan on preprogramming future boards with Atmel’s DFU firmware loader, which will allow you to load firmware via Atmel’s FLIP software without a dedicated programmer.
Development with the Linux avr-gcc stack is complicated by the significant lag between Atmel releasing chips and these projects supporting them. I will put together a page with my patches and build instructions shortly.