EFM32WG Datasheet, PDF (7/834 Pages) List of Unclassifed Manufacturers – The EFM32WG Wonder Gecko is the ideal choice for demanding 8-, 16-, and 32-bit energy sensitive applications.

3.3 Block Diagram
...the world's most energy friendly microcontrollers
Figure 3.1 (p. 7) shows the block diagram of EFM32WG. The color indicates peripheral availability
in the different energy modes, described in Section 3.4 (p. 7) .
Figure 3.1. Block Diagram of EFM32WG
Wonder Gecko
Core and Mem ory
ARM Cort ex™ M4 processor
wit h DSP ext ensions and FPU
Flash
Pr o g r a m
Mem ory
RAM
Mem ory
Debug
In t er f ace
w/ ETM
Mem ory
Prot ect ion
Unit
DMA
Cont roller
Clock Managem ent
High Freq.
Cryst al
Oscillat or
High Freq.
RC
Oscillat or
Low Freq.
Cryst al
Oscillat or
Low Freq.
RC
Oscillat or
Ult ra Low Freq.
RC
Oscillat or
Energy Managem ent
Volt ag e
Regulat or
Volt ag e
Com parat or
Br ow n -ou t
Detector
Back-up
Po w e r
Dom ain
Po w e r -o n
Reset
Serial Int erfaces
USART
UART
Low
En e r g y
I²C
Uart ™
USB
32-bit bus
Peripheral Reflex Syst em
I/O Port s
Ext . Bus TFT
Interface Driver
Ext ernal
In t er r u p t s
Ge n e r a l
Pu r p o se
I/O
Pin
Reset
Pin
Wakeup
Tim ers and Triggers
Tim er/
Count er
LESENSE
Low Energy Real Tim e
Tim er
Count er
Pu l se
Count er
Watchdog
Tim er
Back-up
RTC
Analog Interfaces
ADC
LCD
Cont roller
DAC
Operat ional
Am plifier
Analog
Com parat or
Securit y
Hardware
AES
Figure 3.2. Energy Mode Indicator
0123 4
Note
In the energy mode indicator, the numbers indicates Energy Mode, i.e EM0-EM4.
3.4 Energy Modes
There are five different Energy Modes (EM0-EM4) in the EFM32WG, see Table 3.1 (p. 8) . The
EFM32WG is designed to achieve a high degree of autonomous operation in low energy modes. The
intelligent combination of peripherals, RAM with data retention, DMA, low-power oscillators, and short
wake-up time, makes it attractive to remain in low energy modes for long periods and thus saving energy
consumption.
2013-05-08 - Wonder Gecko Family - d0233_Rev0.50
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