...the world's most energy friendly microcontrollers
2013-06-28 - EFM32G230FXX - d0005_Rev1.60
3
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2 System Summary
2.1 System Introduction
The EFM32 MCUs are the world’s most energy friendly microcontrollers. With a unique combination of
the powerful 32-bit ARM Cortex-M3, innovative low energy techniques, short wake-up time from energy
saving modes, and a wide selection of peripherals, the EFM32G microcontroller is well suited for any
battery operated application as well as other systems requiring high performance and low-energy con-
sumption. This section gives a short introduction to each of the modules in general terms and also shows
a summary of the configuration for the EFM32G230 devices. For a complete feature set and in-depth
information on the modules, the reader is referred to the EFM32G Reference Manual.
A block diagram of the EFM32G230 is shown in Figure 2.1 (p. 3) .
Figure 2.1. Block Diagram
Clock Managem ent
Energy Managem ent
Serial Interfaces
I/O Ports
Core andMemory
Timers andTriggers
Analog Interfaces
Security
32-bit bus
Peripheral Reflex System
ARM Cortex-M3 processor
Flash
Memory
[KB]
Peripheral
Reflex
System
High Frequency
RC
Oscillator
High Frequency
Crystal
Oscillator
Timer/
Counter
Low Energy
Timer
Pulse
Counter
3x
Real Time
Counter
Low Frequency
Crystal
Oscillator
Low Frequency
RC
Oscillator
Voltage
Regulator
Watchdog
Timer
RAM
Memory
[KB]
Voltage
Comparator
Power-on
Reset
Brown-out
Detector
Analog
Comparator
General
Purpose
I/O
Low
Energy
UART
Watchdog
Oscillator
Memory
Protection
Unit
ADC
DAC
DMA
Controller
Debug
Interface
External
Interrupts
Pin
Reset
USART
I2C
AES
32/64/128
8/16/16
3x
2x
56 pins
3x
2x
G230F32/64/128
2.1.1 ARM Cortex-M3 Core
The ARM Cortex-M3 includes a 32-bit RISC processor 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-M3 is described in detail in EFM32G Cortex-M3 Reference Manual.
2.1.2 Debug Interface (DBG)
This device includes hardware debug support through a 2-pin serial-wire debug interface. 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.
2.1.3 Memory System Controller (MSC)
The Memory System Controller (MSC) is the program memory unit of the EFM32G microcontroller. The
flash memory is readable and writable from both the Cortex-M3 and DMA. The flash memory is divided
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相关代理商/技术参数
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