6. Battery Backup

The following parts of the AT91SAMA5D3x Processor can be backed-up by a battery:

  • RC Oscillator

  • Slow Clock Oscillator

  • Reset Controller

  • Shutdown Controller

  • RTC

  • General Purpose Backup Registers

  • Boot Select Control Register

It is recommended to always use a backup power supply (normally a battery) in order to speed up the boot-up time and to avoid reset problems.