EFM32WG Datasheet, PDF (98/834 Pages) List of Unclassifed Manufacturers – The EFM32WG Wonder Gecko is the ideal choice for demanding 8-, 16-, and 32-bit energy sensitive applications.

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9 RMU - Reset Management Unit
0123 4
RESETn
POWERON
BROWNOUT
LOCKUP
SYSRESETREQ
WATCHDOG
9.1 Introduction
Reset Managem ent Unit _RESET
What?
Quick Facts
The RMU ensures correct reset operation.
It is responsible for connecting the different
reset sources to the reset lines of the
EFM32WG.
Why?
A correct reset sequence is needed to
ensure safe and synchronous startup of the
EFM32WG. In the case of error situations
such as power supply glitches or software
crash, the RMU provides proper reset and
startup of the EFM32WG.
How?
The Power-on Reset and Brown-out Detector
of the EFM32WG provides power line
monitoring with exceptionally low power
consumption. The cause of the reset may be
read from a register, thus providing software
with information about the cause of the reset.
The RMU is responsible for handling the reset functionality of the EFM32WG.
9.2 Features
• Reset sources
• Power-on Reset (POR)
• Brown-out Detection (BOD) on the following power domains:
• Regulated domain
• Unregulated domain
• Analog Power Domain 0 (AVDD0)
• Analog Power Domain 1 (AVDD1)
• RESETn pin reset
• Watchdog reset
• EM4 wakeup reset from pin
• EM4 wakeup reset from Backup RTC interrupt
• Wakeup from Backup Mode
• Software triggered reset (SYSRESETREQ)
• Core LOCKUP condition
• EM4 Detection
• A software readable register indicates the cause of the last reset
9.3 Functional Description
The RMU monitors each of the reset sources of the EFM32WG. If one or more reset sources go active,
the RMU applies reset to the EFM32WG. When the reset sources go inactive the EFM32WG starts
2013-05-08 - Wonder Gecko Family - d0233_Rev0.50
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