原标题：Silabs EFM32G890高性能低功耗MCU开发方案

　　Silabs公司的EFM32G890是基于32位ARM Cortex-M3内核的高性能低功耗MCU,具有创新的低功耗技术,节能模式的短叫醒时间和多种外设选择,适合用于以电池为能源的设备如电表,气表,水表和智能计量,工业自动化,家庭自动化,健身和健康设备和智能附件.本文介绍了EFM32G890主要特性,框图,开发板EFM32-G8XX-DK主要特性和电路图,EFM32 G890 MCU板主要特性和电路图以及EXP32 prototype板主要特性和电路图.

　　The EFM32 MCUs are the world’s most energy friendly microcontrollers. With a unique combination ofthe powerful 32-bit ARM Cortex-M3, innovative low energy techniques, short wake-up time from energysaving modes, and a wide selection of peripherals, the EFM32G microcontroller is well suited for anybattery 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 showsa summary of the configuration for the EFM32G890 devices.

　　EFM32G890主要特性:

　　• ARM Cortex-M3 CPU platform

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

　　• Memory Protection Unit

　　• Wake-up Interrupt Controller

　　• Flexible Energy Management System

　　• 20 nA @ 3 V Shutoff Mode

　　• 0.6 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

　　• 45 μA/MHz @ 3 V Sleep Mode

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

　　• 128/64/32 KB Flash

　　• 16/16/8 KB RAM

　　• 90 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

　　• 8 Channel DMA Controller

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

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

　　• Timers/Counters

　　• 3× 16-bit Timer/Counter

　　• 3×3 Compare/Capture/PWM channels

　　• Dead-Time Insertion on TIMER0

　　• 16-bit Low Energy Timer

　　• 1× 24-bit Real-Time Counter

　　• 3× 8-bit Pulse Counter

　　• Watchdog Timer with dedicated RC oscillator @ 50 nA

　　• Integrated LCD Controller for up to 4×40 segments

　　• Voltage boost, adjustable contrast and autonomous animation

　　• External Bus Interface for up to 4x64 MB of externalmemory mapped space

　　• Communication interfaces

　　• 3× Universal Synchronous/Asynchronous Receiver/Transmitter

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

　　• Triple buffered full/half-duplex operation

　　• 1× Universal Asynchronous Receiver/Transmitter

　　• 2× 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

　　• 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

　　• Supply Voltage Comparator

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

　　• 2-pin Serial Wire Debug interface

　　• 1-pin Serial Wire Viewer

　　• Pre-Programmed UART Bootloader

　　• Temperature range -40 to 85 ºC

　　• Single power supply 1.98 to 3.8 V

　　• BGA112 package

　　EFM32 MCU系列主要应用:

　　• Energy, gas, water and smart metering

　　• Health and fitness applications

　　• Smart accessories

　　• Alarm and security systems

　　• Industrial and home automation

　　图1。EFM32G890框图

　　开发板EFM32-G8XX-DK

　　The EFM32 Gecko Development Kit is a platform for rapidprototyping of ultra low power microcontroller applications.It consists of a mother board, a replaceable MCU-boardand a prototyping-board, along with a comprehensive softwaredevelopment environment.

　　The development kit contains a unique Advanced EnergyMonitoring (AEM) system that allows designers to have fullcontrol over their application’s energy consumption. Combinedwith the possibility to isolate the motherboard’s componentsnot relevant for the end application, designers canoptimize all variables that will make their application as energyefficient as possible.

　　The on-board emulator enables extremely simple setup,and combined with the versatile peripherals (e.g. accelerometer,TFT-display, audio input/output, RS232, userLEDs / buttons), the development kit gives a complete basisfor application design and prototyping.

　　The EFM32-G8XX-DK is a highly flexible development kit. It offers many features and peripherals to theEFM32 through jumperless configuration. The different features on the kit are available as configuredin the motherboard’s Board Controller. Configuration is easily done by a simple API in the kit BoardSupport Package.

　　If none of the motherboard features are needed, configuration of the Board Controller is not necessary.

　　All EFM32 GPIO pins are available on the prototyping board.

　　开发板EFM32-G8XX-DK主要特性:

　　• Advanced Energy Monitoring system for precise current tracking.

　　• Special hardware configuration for isolation of the MCU power domain.

　　• Replaceable prototyping board for quick custom application development.

　　• Full feature USB debugger / emulator with debug out functionality.

　　• 3.5-inch TFT-LCD 320x240 pixel RGB color display.

　　• Board Controller for board configuration / signal routing.

　　• Single ended and differential ADC inputs.

　　• Line-in stereo audio input amplifier.

　　• Line-out stereo audio output amplifier.

　　• 2 RS232 connectors.

　　• 3-axis accelerometer.

　　• SPI Flash and microSD card reader (SPI mode).

　　• EEPROM.

　　• Temperature sensor.

　　• IrDA tranceiver.

　　• 256Kx16bit / 512KB parallel bus SRAM.

　　• 2Mx16 / 4MB parallel bus NOR Flash.

　　• Ambient light sensor and potmeter.

　　• 5 way joystick.

　　• 4 User buttons, 8-bit DIP switch and 16 user LEDs.

　　图.开发板EFM32-G8XX-DK外形图

　　EFM32 G890 MCU板

　　The EFM32 G890 MCU Board is a small plugin module for usage with the EFM32 Gecko Development Kit.

　　EFM32 G890 MCU板主要特性:

　　• The worlds most energy friendly microcontroller

　　• Compatible with the Advanced Energy Monitoring (AEM) system of the EFM32 Gecko Development Kit

　　• Leds indicating power and reset

　　• 32 MHz crystal

　　• 32.768 kHz crystal

　　• Reset button and ground-hooks for easy debugging

　　• Energy Micro LCD

　　图.EFM32 G890 MCU板外形图

　　EXP32 Prototype板

　　The EXP32 Prototype Board is a versatile plugin module for integration of custom circuits with the EFM32.

　　The VMCU power domain is tracked by the Advanced Energy Monitor (AEM), which gives detailed informationabout the current consumption.

　　EXP32 Prototype板主要特性:

　　• Ready-to-use prototyping area for hole-mount, TSSOP, SO, SOT23-6, SOT23 and 0805 SMD components.

　　• VMCU power domain tracked by the Advanced Energy Monitor (AEM).

　　• 3.3V and 5V power domains available.

　　• All EFM32 IO lines directly accessible through pin headers.

　　• User LEDS ready for use.

　　• LEDS indicating power.

　　图.EXP32 Prototype板外形图