Emu - Energy Management Unit; Introduction - Silicon Laboratories EFR32xG14 Wireless Gecko Reference Manual

10. EMU - Energy Management Unit

0 1 2

10.1 Introduction

The Energy Management Unit (EMU) manages all the low energy modes (EM) in EFR32. Each energy mode manages whether the
CPU and the various peripherals are available. The energy modes range from EM0 Active to EM4 Shutoff. EM0 Active mode provides
the highest amount of features, enabling the CPU, Radio, and peripherals with the highest clock frequency. EM4 Shutoff Mode provides
the lowest power state, allowing the part to return to EM0 Active on a wake-up condition. The EMU also controls the various power
routing configurations, internal regulators settings, and voltage monitoring needed for optimal power configuration and protection.
silabs.com | Building a more connected world.
3 4
EMU - Energy Management Unit
Quick Facts
What?
The EMU (Energy Management Unit) handles the
different low energy modes in EFR32
Why?
The need for performance and peripheral functions
varies over time in most applications. By efficiently
scaling the available resources in real time to match
the demands of the application, the energy con-
sumption can be kept at a minimum.
How?
With a broad selection of energy modes, a high
number of low-energy peripherals available even in
EM2 Deep Sleep, and short wake-up time (3 µs from
EM2 Deep Sleep and EM3 Stop), applications can
dynamically minimize energy consumption during
program execution.
Reference Manual
Rev. 1.1 | 212