After a Power-on Reset, some registers will
be loaded with initial values from the NVM User Row.
This includes the following bits and bit
groups:
- Enable bit in the Control A register, CTRLA.ENABLE
- Always-On bit in the Control A register, CTRLA.ALWAYSON
- Run In Standby Enable bit in the Control A
register (CTRLA.RUNSTDBY)
- Watchdog Timer Windows Mode Enable bit in the Control A register, CTRLA.WEN
- Watchdog Timer Windows Mode Time-Out Period bits in the Configuration register,
CONFIG.WINDOW
- Time-Out Period bits in the
Configuration register, CONFIG.PER
- Early Warning Interrupt Time Offset bits in the Early Warning Interrupt Control
register, EWCTRL.EWOFFSET