原标题：Silabs EFM32GG230 32位MCU入门开发方案

　　Silabs公司的EFM32GG230是基于32位ARM Cortex-M3核的MCU,工作频率高达48MHz,具有灵活的能量管理系统,采用低能耗技术,从节能模式到叫醒时间短,并具有广泛选择的外设,非常适合用在智能电表,水表和气表, 健康和健身应用,告警和安全系统以及工业和家庭自动化.本文介绍了EFM32GG230主要特性和框图, 入门开发板EFM32GG-STK3700主要特性和框图,电路图,材料清单和PCB元件布局图.

　　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 EFM32GG microcontroller is well suited for any battery operated application as well as other systems requiring high performance and low-energy consumption. This section gives a short introduction to each of the modules in general terms and also shows a summary of the configuration for the EFM32GG230 devices.

　　EFM32GG230主要特性:

　　• ARM Cortex-M3 CPU platform

　　• High Performance 32-bit processor @ up to 48 MHz

　　• Memory Protection Unit

　　• Flexible Energy Management System

　　• 20 nA @ 3 V Shutoff Mode

　　• 0.4 μA @ 3 V Shutoff Mode with RTC

　　• 0.8 μA @ 3 V Stop Mode, including Power-on Reset, Brown-out Detector, RAM and CPU retention

　　• 1.1 μA @ 3 V Deep Sleep Mode, including RTC with 32.768 kHz oscillator, Power-on Reset, Brown-out Detector, RAM and CPU retention

　　• 80 μA/MHz @ 3 V Sleep Mode

　　• 219 μA/MHz @ 3 V Run Mode, with code executed from flash

　　• 1024/512 KB Flash

　　• Read-while-write support

　　• 128 KB RAM

　　• 56 General Purpose I/O pins

　　• Configurable push-pull, open-drain, pull-up/down, input filter, drive strength

　　• Configurable peripheral I/O locations

　　• 16 asynchronous external interrupts

　　• Output state retention and wake-up from Shutoff Mode

　　• 12 Channel DMA Controller

　　• 12 Channel Peripheral Reflex System (PRS) for autonomous inter-peripheral signaling

　　• Hardware AES with 128/256-bit keys in 54/75 cycles

　　• Timers/Counters

　　• 4× 16-bit Timer/Counter

　　• 4×3 Compare/Capture/PWM channels

　　• Dead-Time Insertion on TIMER0

　　• 16-bit Low Energy Timer

　　• 1× 24-bit Real-Time Counter and 1× 32-bit Real-Time Counter

　　• 3× 16/8-bit Pulse Counter with asynchronous operation

　　• Watchdog Timer with dedicated RC oscillator @ 50 nA

　　• Backup Power Domain

　　• RTC and retention registers in a separate power domain, available in all energy modes

　　• Operation from backup battery when main power drains out

　　• Communication interfaces

　　• 3× Universal Synchronous/Asynchronous Receiver/Transmitter

　　• UART/SPI/SmartCard (ISO 7816)/IrDA/I2S

　　• 2× Low Energy UART

　　• Autonomous operation with DMA in Deep Sleep Mode

　　• 2× I2C Interface with SMBus support

　　• Address recognition in Stop Mode

　　• Ultra low power precision analog peripherals

　　• 12-bit 1 Msamples/s Analog to Digital Converter

　　• 8 single ended channels/4 differential channels

　　• On-chip temperature sensor

　　• 12-bit 500 ksamples/s Digital to Analog Converter

　　• 2× Analog Comparator

　　• Capacitive sensing with up to 16 inputs

　　• 3× Operational Amplifier

　　• 6.1 MHz GBW, Rail-to-rail, Programmable Gain

　　• Supply Voltage Comparator

　　• Low Energy Sensor Interface (LESENSE)

　　• Autonomous sensor monitoring in Deep Sleep Mode

　　• Wide range of sensors supported, including LC sensors and capacitive buttons

　　• Ultra efficient Power-on Reset and Brown-Out Detector

　　• Debug Interface

　　• 2-pin Serial Wire Debug interface

　　• 1-pin Serial Wire Viewer

　　• Embedded Trace Module v3.5 (ETM)

　　• Pre-Programmed UART Bootloader

　　• Temperature range -40 to 85 ºC

　　• Single power supply 1.98 to 3.8 V

　　• QFN64 package

　　EFM32GG230应用:

　　• Energy, gas, water and smart metering

　　• Health and fitness applications

　　• Smart accessories

　　• Alarm and security systems

　　• Industrial and home automation

　　图1. EFM32GG230框图

　　EFM32™ Giant Gecko Starter Kit EFM32GG-STK3700

　　Silicon Labs’ EFM32GG-STK3700 is an excellent starting point to get familiar with the EFM32™ Giant Gecko 32-bit microcontrollers. The starter kit contains sensors and peripherals demonstrating some of the MCU’s many capabilities and can serve as a starting point for application development. The Giant Gecko features an on-board SEGGER J-Link debugger and an Advanced Energy Monitoring system, allowing you to program, debug and perform real-time current profiling of your application without using external tools.

　　入门开发板EFM32GG-STK3700主要特性:

　　• EFM32GG990F1024 MCU with 1 MB Flash and 128 KB RAM.

　　• Advanced Energy Monitoring system for precise current tracking.

　　• Integrated Segger J-Link USB debugger/emulator with debug out functionality.

　　• 160 segment Energy Micro LCD.

　　• 20 pin expansion header.

　　• Breakout pads for easy access to I/O pins.

　　• Power sources include USB and CR2032 battery.

　　• 2 user buttons, 2 user LEDs and a touch slider.

　　• Ambient Light Sensor and Inductive-capacitive metal sensor.

　　• EFM32 OPAMP footprint.

　　• 32 MB NAND Flash.

　　• USB Micro-AB (OTG) connector.

　　• 0.03F Super Capacitor for backup power domain.

　　• Crystals for LFXO and HFXO: 32.768kHz and 48.000MHz.

　　图2 入门开发板EFM32GG-STK3700外形图

　　图3. 入门开发板EFM32GG-STK3700框图