By default, the selected debug UART console is DBGU.
The following PIOs are used :
PA9: DRXD (Receive Data
UART)
PA10: DTXD (Transmit Data
UART)
To restore the default factory setup, power off the SAM9X60D1G-I/LZB module, then turn
off and back on again the VDDBU voltage before powering on the module.