Xmega128a4u BO Testplan

This is the explanation how to test the Xmega128a4u breakout board in mass production process.

• All pins on the two 20-pin connectors are tested against short circuit or open connection.
• The crystal is testet by starting the crystal oscillator.
• LEDs are optically tested.
• USB connector is testet against short circuit and open connection.
• USB ESD protection is testet: BAS70 diode forward voltage, Z-diode breakdown voltage
• Reference voltage capacitors are tested.