Registers Latched In Em4; Register Resets - Silicon Laboratories EFR32xG14 Wireless Gecko Reference Manual

10.3.15 Registers latched in EM4

The following registers will be latched when entering EM4. After wake-up from EM4, these registers will be reset and require reprog-
ramming prior to writing the EMU_CMD_EM4UNLATCH command.
• CMU_LFRCOCTRL
• CMU_LFXOCTRL
• CMU_LFECLKSEL
• CMU_LFECLKEN0
• CMU_LFEPRESC0

10.3.16 Register Resets

Each EMU register requires retaining state in various energy modes and power transitions and will consequently need to be reset with a
different condition. The following reset conditions will apply to the appropriate set of registers as marked in the Register Description
table.
• Reset with POR or Hard Pin Reset
• Reset with POR, Hard Pin Reset, or any BOD reset
• Reset with SYSEXTENDEDRESETn
• Reset with FULLRESETn (default)
If a register field is not marked with a specific reset condition then it is assumed to be reset with FULLRESETn.
silabs.com | Building a more connected world.
Reference Manual
EMU - Energy Management Unit
Rev. 1.1 | 235