原标题：Silabs EFM32ZG222 32位MCU应用开发方案

　　Silabs公司的EFM32HG322F64是基于32位ARM Cortex-M0+核的低功耗微控制器,工作频率高达24MHz,采用创新的低能耗技术,短叫醒时间,以及各种外设,非常适合用在以电池为能源的应用和高性能低功耗的系统.本文介绍了EFM32ZG222主要特性,框图,以及入门套件入门套件EFM32ZG-STK3200主要特性,框图和电路图.

　　The EFM32 MCUs are the world’s most energy friendly microcontrollers. With a unique combinationof the powerful 32-bit ARM Cortex-M0+, innovative low energy techniques, short wake-up time fromenergy saving modes, and a wide selection of peripherals, the EFM32ZG microcontroller is well suitedfor any battery operated application as well as other systems requiring high performance and low-energyconsumption. This section gives a short introduction to each of the modules in general terms and alsoshows a summary of the configuration for the EFM32ZG222 devices. For a complete feature set and indepthinformation on the modules, the reader is referred to the EFM32ZG Reference Manual.

　　EFM32ZG222主要特性:

　　• ARM Cortex-M0+ CPU platform

　　• High Performance 32-bit processor @ up to 24 MHz

　　• Wake-up Interrupt Controller

　　• Flexible Energy Management System

　　• 20 nA @ 3 V Shutoff Mode

　　• 0.5 μA @ 3 V Stop Mode, including Power-on Reset, Brown-outDetector, RAM and CPU retention

　　• 0.9 μA @ 3 V Deep Sleep Mode, including RTC with 32.768 kHzoscillator, Power-on Reset, Brown-out Detector, RAM and CPUretention

　　• 48 μA/MHz @ 3 V Sleep Mode

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

　　• 32/16/8/4 KB Flash

　　• 4/4/2/2 KB RAM

　　• 37 General Purpose I/O pins

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

　　• Configurable peripheral I/O locations

　　• 16 asynchronous external interrupts

　　• Output state retention and wake-up from Shutoff Mode

　　• 4 Channel DMA Controller

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

　　• Hardware AES with 128-bit keys in 54 cycles

　　• Timers/Counters

　　• 2× 16-bit Timer/Counter

　　• 2×3 Compare/Capture/PWM channels

　　• 1× 24-bit Real-Time Counter

　　• 1× 16-bit Pulse Counter

　　• Watchdog Timer with dedicated RC oscillator @ 50 nA

　　• Communication interfaces

　　• Universal Synchronous/Asynchronous Receiver/Transmitter

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

　　• Triple buffered full/half-duplex operation

　　• Low Energy UART

　　• Autonomous operation with DMA in Deep SleepMode

　　• 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

　　• 4 single ended channels/ differential channels

　　• On-chip temperature sensor

　　• Current Digital to Analog Converter

　　• Selectable current range between 0.05 and 64 uA

　　• 1× Analog Comparator

　　• Capacitive sensing with up to 5 inputs

　　• Supply Voltage Comparator

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

　　• 2-pin Serial Wire Debug interface

　　• Pre-Programmed UART Bootloader

　　• Temperature range -40 to 85 ºC

　　• Single power supply 1.98 to 3.8 V

　　• TQFP48 package

　　EFM32ZG222主要应用:

　　• Energy, gas, water and smart metering

　　• Health and fitness applications

　　• Smart accessories

　　• Alarm and security systems

　　• Industrial and home automation

　　图1。EFM32ZG222框图

　　入门套件EFM32ZG-STK3200

　　The EFM32ZG-STK3200 is an excellent starting point to get familiar with the EFM32 Zero Geckomicrocontrollers. The kit contains a few buttons and LEDs, some capactive touch pads and a very lowpower Memory LCD-TFT display. In addition to demonstrating the EFM32 Zero Gecko’s capabilities, thekit can also serve as a good starting point for application development.

　　Supported by Simplicity Studio, 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 EFM32ZG-STK3200 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.

　　入门套件EFM32ZG-STK3200主要特性:

　　EFM32ZG222F32 MCU with 32 KB Flash and 4 KB RAM

　　Advanced Energy Monitoring system for precise current tracking

　　Integrated SEGGER J-Link USB debugger/emulator with debug out functionality

　　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

　　2 capacitve touch pads

　　Ultra low power 128x128 pixel Memory-LCD

　　Crystals for LFXO and HFXO: 32.768 kHz and 24.000 MHz

　　Supported by Simplicity Studio

　　图2。入门套件EFM32ZG-STK3200外形图

　　图3。入门套件EFM32ZG-STK3200框图