EFM32WG Datasheet, PDF (104/834 Pages) List of Unclassifed Manufacturers – The EFM32WG Wonder Gecko is the ideal choice for demanding 8-, 16-, and 32-bit energy sensitive applications.

...the world's most energy friendly microcontrollers
Bit
Name
Reset
Access Description
31:1
Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
0
RCCLR
0
W1
Reset Cause Clear
Set this bit to clear the LOCKUPRST and SYSREQRST bits in the RMU_RSTCAUSE register. Use the HRCCLR bit in the
EMU_AUXCTRL register to clear the remaining bits.
2013-05-08 - Wonder Gecko Family - d0233_Rev0.50
104
www.energymicro.com