Reset Levels - Silicon Laboratories EFR32xG14 Wireless Gecko Reference Manual

9.3.1 Reset Levels

The reset sources on EFR32 can be divided in two main groups; Hard resets and Soft resets.
The soft resets can be configured to be either DISABLED, LIMITED, EXTENDED or FULL. The reset level for soft reset sources is
configured in the xxxRMODE bitfields in RMU_CTRL.
RMU_CTRL_xxxRMODE
DISABLED
LIMITED
EXTENDED
FULL
The reset sources resulting in a soft reset are:
• Watchdog reset
• Lockup reset
• System reset request
• Pin reset 1
1 Pin reset can be configured to be either a soft or a hard reset, see
Note: LIMITED and EXTENDED resets are synchronized to HFSRCCLK. If HFSRCCLK is slow, there will be latency on reset assertion.
If HFSRCCLK is not running, reset will be asserted after a timeout.
Hard resets will reset the entire chip, the reset sources resulting in a hard reset are:
• Power-on reset
• Brown-out reset
• Pin reset 1
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Table 9.1. Reset Levels
Parts of System Reset
Nothing is reset, request will not be registered in
RMU_RSTCAUSE
Everything reset, with exception of CRYOTIMER, RFSENSE, DE-
BUGGER, RTCC, VMON and parts of CMU, RMU and EMU.
Everything reset, with exception of CRYOTIMER, RFSENSE, DE-
BUGGER, and parts of CMU, RMU and EMU.
Everything reset, with exception of some registers in RMU and
EMU.
9.3.5 RESETn Pin Reset
Reference Manual
RMU - Reset Management Unit
for details
Rev. 1.1 | 201