ADuCM4050超低功耗集成了带功率管理的微控制器_技术

　　ADI公司的ADuCM4050是超低功耗集成了带功率管理的基于ARM® Cortex®-M4F处理器的微控制器（MCU），同时集成了数字外设，嵌入SRAM和嵌入闪存和提供时钟，重置和功率管理功能的模拟子系统以及模数转换器（ADC）子系统.MCU工作频率高达52MHz，主要用在物联网（IoT），智能农业，智能建筑，智能测量，智能城市，智能机器和传感器网络，可穿戴设备，健身和医疗等。本文介绍了ADuCM4050产品亮点和主要特性，框图和几种应用电路，开发平台EV-cog-AD4050主要特性和优势以及电路图。

　　The ADuCM4050 microcontroller unit （MCU） is an ultra low power integrated microcontroller system with integrated power management for processing， control， and connecTIvity. The MCU system is based on the ARM® Cortex®-M4F processor. The MCU also has a collecTIon of digital peripherals， embedded staTIc random access memory （SRAM） and embedded flash memory， and an analog subsystem that provides clocking， reset， and power management capabiliTIes in addition to an analog-to-digital converter （ADC） subsystem.

　　This data sheet describes the ARM Cortex-M4F core and memory architecture used on the ADuCM4050 MCU. It does not provide detailed programming information about the ARM processor.

　　The system features include an up to 52 MHz ARM Cortex-M4F processor， 512 kB of embedded flash memory with error correction code （ECC）， an optional 4 kB cache for lower active power， and 128 kB system SRAM with parity. The ADuCM4050 features a power management unit （PMU）， multilayer advanced microcontroller bus architecture （AMBA） bus matrix， central direct memory access （DMA） controller， and beeper interface.

　　The ADuCM4050 features cryptographic hardware supporting advanced encryption standard （AES）-128 and AES-256 with secure hash algorithm （SHA）-256 and the following modes： electronic code book （ECB）， cipher block chaining （CBC）， counter （CTR）， and cipher block chaining-message authentication code （CCM/CCM*） modes.

　　The ADuCM4050 has protected key storage with key wrap/ unwrap， and keyed hashed message authentication code （HMAC） with key unwrap. The ADuCM4050 supports serial port （SPORT）， serial peripheral interface （SPI）， I2C， and universal asynchronous receiver/ transmitter （UART） peripheral interfaces.

　　The ADuCM4050 features a real-time clock （RTC）， general-purpose and watchdog timers， and programmable general-purpose input/output （GPIO） pins. There is a hardware cyclic redundancy check （CRC） calculator with programmable generator polynomial. The device also features a power on reset （POR） and power supply monitor （PSM）， a 12-bit successive approximation register （SAR） ADC， a red/green/blue （RGB） timer for driving RGB LED， and a true random number generator （TRNG）。

　　To support low dynamic and hibernate power management， the ADuCM4050 MCU provides a collection of power modes and features such as dynamic- and software-controlled clock gating and power gating.

　　ADuCM4050产品亮点：

　　1. Ultra low power consumption.

　　2. Robust operation.

　　3. Full voltage monitoring in deep sleep modes.

　　4. ECC support on flash.

　　5. Parity error detection on SRAM memory.

　　6. Leading edge security.

　　7. Fast encryption provides read protection to user algorithms.

　　8. Write protection prevents device reprogramming by unauthorized code.

　　9. Failure detection of 32 kHz low frequency external crystal oscillator （LFXTAL） via interrupt.

　　10. SensorStrobe™ for precise time synchronized sampling of external sensors. Works in hibernate mode， resulting in drastic current reduction in system solutions. Current consumption reduces by 10 times when using， for example， the ADXL363 accelerometer. Software intervention is not required after setup. No pulse drift due to software execution.

　　ADuCM4050主要特性：

　　EEMBC ULPMark™-CP score （3 V）： 189

　　Ultra low power active and hibernate modes

　　Active mode dynamic current： 41 μA/MHz （typical）

　　Flexi mode： 400 μA （typical）

　　Hibernate mode： 0.65 μA （typical）

　　Shutdown mode： 50 nA （typical）

　　Shutdown mode （fast wake-up）： 0.20 μA （typical）

　　ARM Cortex-M4F processor at 52 MHz with FPU， MPU， ITM with SWD interface

　　Power management

　　Single-supply operation （connected to VBAT pins）： 1.74 V to 3.6 V

　　Optional buck converter for improved efficiency

　　Memory options

　　512 kB of embedded flash memory with ECC

　　4 kB of cache memory to reduce active power

　　128 kB of configurable system SRAM with parity

　　Safety

　　Watchdog with dedicated on-chip oscillator

　　Hardware CRC with programmable polynomial

　　Multiparity bit protected SRAM

　　ECC protected embedded flash

　　Security

　　Hardware cryptographic accelerator supporting AES-128， AES-256， and SHA-256

　　Protected key storage in flash， SHA-256-based keyed

　　HMAC and key wrap and unwrap

　　User code protection

　　TRNG

　　Digital peripherals

　　3 SPI interfaces to enable glueless interface to sensors， radios， and converters

　　1 I2C and 2 UART peripheral interfaces

　　SPORT for natively interfacing with converters and radios Programmable GPIOs （44 in LFCSP and 51 in WLCSP）

　　3 general-purpose timers with PWM support

　　RGB timer for driving RGB LED

　　RTC0 for time keeping

　　RTC1 with SensorStrobe and time stamping

　　Programmable beeper

　　27-channel DMA controller

　　Clocking features

　　26 MHz clock： on-chip oscillator， external crystal oscillator， SYS_CLKIN for external clock， and integrated PLL

　　32 kHz clock： on-chip oscillator and low power crystal oscillator

　　Clock fail detection for external crystals

　　Analog peripherals

　　12-bit SAR ADC， 1.8 MSPS， 8 channels， and digital comparator

　　ADuCM4050应用：

　　Internet of Things （IoT）

　　Smart agriculture， smart building， smart metering， smart city， smart machine， and sensor network

　　Wearables

　　Fitness and clinical

　　Machine learning and neural networks

　　图1.ADuCM4050框图

　　图2.ADuCM4050采用内部降压转换器的推荐外接元件图

　　图3.ADuCM4050采用LFXTAL和HFXTAL的推荐外接元件图

　　图4.ADuCM4050采用内部ADC的推荐VREF_ADC引脚和ADC输入通路的外接元件图

　　开发平台EV-COG-AD4050

　　The EV-COG-AD4050 is a development platform for Analog Devices Ultra Low Power technology across ADI ’ s MCU and RF transceiver portfolio. The board uses CrossCore Embedded Studio， an open source Eclipse based Interactive Development Environment （IDE）， which can be downloaded free of charge. The platform contains many hardware and software example projects to make it easier for customers to prototype and create solutions for Internet of Things （IoT） applications.

　　开发平台EV-COG-AD4050主要特性和优势：

　　On-board ultra-low power ARM Cortex M4F MCU

　　No external Debugger/Emulator Tools required

　　Small form factor （75X35mm ）

　　Multiple power options – USB， Coincell， External， Li-Ion

　　Onboard peripherals – Accelerometer， Temperature sensor

　　Compatible with ADI RF daughter cards， and RF modules

　　Compatible with ADI application add-on boards （Gears）

　　Expansion Connectors and Jumpers for providing external access to all MCU signals

　　The EV-COG-AD4050LZ is a modular Internet of Things （IOT） development platform based on the ADUCM4050 ultra low power microcontroller （MCU） with integrated power management for processing， control， and connectivity. The MCU system is based on the ARM Cortex-M4F processor， a collection of digital peripherals， embedded SRAM and flash memory， and an analog subsystem which provides clocking， reset， and power management capability in addition to an analog-to-digital converter （ADC） subsystem. The ADUCM4050 has industry leading ultra low power which makes it ideal for developing battery powered and self powered wireless sensor nodes. The Cog platform uses CrossCore Embedded Studio， an open source Eclipse based Interactive Development Environment （IDE）， which can be downloaded free of charge. The platform contains many hardware and software example projects to make it easier for customers to prototype and create connected systems and solutions for Internet of Things （IoT） applications.