EFM32WG840F128 Energy Micro, EFM32WG840F128 Datasheet - Page 3

• Manufacturer Part Number: EFM32WG840F128
• Description: ARM Microcontrollers - MCU 128kb flash 32kb RAM
• Manufacturer: Energy Micro

Specifications of EFM32WG840F128

• Rohs: yes
• Core: ARM Cortex M4F
• Processor Series: EFM32WG840
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 48 MHz
• Program Memory Size: 128 KB
• Data Ram Size: 32 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 1.85 V to 3.8 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: QFN-64
• Mounting Style: SMD/SMT

2 System Summary
2.1 System Introduction
2.1.1 ARM Cortex-M4F Core
2.1.2 Debug Interface (DBG)
2012-09-11 - EFM32WG840FXX - d0195_Rev1.00
The EFM32 MCUs are the world’s most energy friendly microcontrollers. With a unique combination of
the powerful 32-bit ARM Cortex-M4F, with DSP instruction support and floating-point unit, innovative low
energy techniques, short wake-up time from energy saving modes, and a wide selection of peripherals,
the EFM32WG microcontroller is well suited for any battery operated application as well as other sys-
tems requiring high performance and low-energy consumption. This section gives a short introduction
to each of the modules in general terms and also and shows a summary of the configuration for the
EFM32WG840 devices. For a complete feature set and in-depth information on the modules, the reader
is referred to the EFM32WG Reference Manual.
A block diagram of the EFM32WG840 is shown in Figure 2.1 (p. 3) .
Figure 2.1. Block Diagram
The ARM Cortex-M4F includes a 32-bit RISC processor, with DSP instruction support and floating-point
unit, which can achieve as much as 1.25 Dhrystone MIPS/MHz. A Memory Protection Unit with support
for up to 8 memory segments is included, as well as a Wake-up Interrupt Controller handling interrupts
triggered while the CPU is asleep. The EFM32 implementation of the Cortex-M4F is described in detail
in EFM32 Cortex-M4F Reference Manual.
This device includes hardware debug support through a 2-pin serial-wire debug interface and an Embed-
ded Trace Module (ETM) for data/instruction tracing. In addition there is also a 1-wire Serial Wire Viewer
pin which can be used to output profiling information, data trace and software-generated messages.
Serial Int erfaces
Flash
Program
Mem ory
USART
Low
Energy
UART
ARM Cort ex™ M4F processor
w/ DSP support & FP unit
UART
I
2
C
RAM
Mem ory
Core and Mem ory
I/O Port s
Ext ernal
Int errupt s
Pin
Reset
Debug
Int erface
w/ ETM
WG840F256
Preliminary
Pin
Wakeup
General
Purpose
I/O
Peripheral Reflex Syst em
Mem ory
Prot ect ion
Unit
DMA
Cont roller
32-bit bus
Tim ers and Triggers
...the world's most energy friendly microcontrollers
Tim er/
Count er
Low Energy
Tim er
Pulse
Count er
Back-up
RTC
3
Clock Managem ent
High Freq.
Cryst al
Oscillat or
Low Freq.
Cryst al
Oscillat or
LESENSE
Real Tim e
Count er
Wat chdog
Tim er
Ult ra Low Freq.
RC
Oscillat or
High Freq
RC
Oscillat or
Low Freq.
RC
Oscillat or
Analog Int erfaces
Analog
Com parat or
ADC
DAC
Energy Managem ent
www.energymicro.com
Brown-out
Det ect or
Volt age
Regulat or
Back-up
Power
Dom ain
LCD
Cont roller
Operat ional
Am plifier
Volt age
Com parat or
Power-on
Reset
Securit y
Hardware
AES