** [https://www.dave.eu/sites/default/files/files/axel-ulite-hm.pdf#page=51 SPI3]
* [[/Peripherals/Real_Time_Clock | Real Time Clock ]]
* [[/PeripheralsPower_and_Reset/Watchdog Reset_scheme_and_control_signals#Handling_CPU-initiated_software_reset | Watchdog]]
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* I2C