原标题：Maxim MAX32630超低功耗高性能可穿戴MCU开发方案

　　Maxim公司的MAX32630/MAX32631是集成了浮点单元的超低功耗高性能ARM Cortex-M4F32位MCU,非常适合用于可穿戴医疗和健身设备.MCU组合了超低功耗高效率信号处理功能和大幅度降低功耗,使用方便.内部振荡器工作高达96MHz,集成了2MB闪存, 512KB SRAM和8KB指令缓存,MCU内和工作电压1.2V,I/O电压1.8V-3.3V,主要用在健身监视,手持医疗设备,传感器集线器,运动手表和可穿戴医疗贴片.本文介绍了MAX32630主要特性,框图和MAX3263x评估板优势和特性,框图,电路图,材料清单和PCB元件布局图.

　　The MAX32630/MAX32631 is an ARM® Cortex® -M4F 32-bit microcontroller with a floating point unit, ideal for the emerging category of wearable medical and fitness applications. The architecture combines ultra-low power high-efficiency signal processing functionality with significantly reduced power consumption and ease of use. The device features four powerful and flexible power modes. A peripheral management unit (PMU) enables intelligent peripheral control with up to six channels to significantly reduce power consumption. Built-in dynamic clock gating and firmware-controlled power gating allows the user to optimize power for the specific application. Multiple SPI, UART and I²C serial interfaces, as well as 1-Wire® master and USB, allow for interconnection to a wide variety of external sensors. A four-input, 10-bit ADC with selectable references is available to monitor analog input from external sensors and meters. The small 100-ball WLP package provides a tiny, 4.37mm x 4.37mm footprint.

　　The MAX32630/MAX32631 include a hardware AES engine. The MAX32631 is a secure version of the MAX32630. It incorporates a trust protection unit (TPU) with encryption and advanced security features. These features include a modular arithmetic accelerator (MAA) for fast ECDSA, a hardware PRNG entropy generator, and a secure boot loader.

　　MAX32630主要特性:

　　High-Efficiency Microcontroller for Wearable Devices

　　Internal Oscillator Operates Up to 96MHz

　　Low Power 4MHz Oscillator System Clock Option for Always-On Monitoring Applications 2MB Flash Memory

　　512KB SRAM

　　8KB Instruction Cache

　　1.2V Core Supply Voltage

　　1.8V to 3.3V I/O

　　Optional 3.3V ±5% USB Supply Voltage

　　Power Management Maximizes Uptime for Battery Applications

　　106µA/MHz Active Current Executing from Cache

　　Wakeup to 96MHz Clock or 4MHz Clock

　　600nA Low Power Mode (LP0) Current with RTC Enabled

　　3.5µW Ultra-Low Power Data Retention Sleep Mode (LP1) with Fast 5µs Wakeup to 96MHz

　　Optimal Peripheral Mix Provides Platform Scalability

　　SPIX Execute in Place (XIP) Engine for Memory Expansion with Minimal Footprint

　　Three SPI Masters, One SPI Slave

　　Four UARTs

　　Three I²C Masters, One I²C Slave

　　1-Wire Master

　　Full-Speed USB 2.0 Engine with Internal Transceiver

　　Sixteen Pulse Train (PWM) Engines

　　Six 32-Bit Timers and 3 Watchdog Timers

　　Up to 66 General-Purpose I/O Pins

　　One 10-Bit Delta-Sigma ADC Operating at 7.8ksps

　　AES-64, -128, -256

　　CMOS-Level 32kHz RTC Output

　　Secure Valuable IP and Data with Robust Internal Hardware Security (MAX32631 Only)

　　Trust Protection Unit (TPU) Including MAA Supports ECDSA and Modular Arithmetic

　　PRNG Seed Generator

　　Secure Boot Loader

　　MAX32630应用:

　　Fitness Monitors

　　Portable Medical Devices

　　Sensor Hubs

　　Sports Watches

　　Wearable Medical Patches

　　图1.MAX32630简化框图

　　MAX3263x评估板

　　The MAX3263x evaluation kit (EV kit) provides a convenientplatform for evaluating the capabilities of theMAX3263x microcontroller. The EV kit also provides acomplete, functional system ideal for developing anddebugging applications.

　　MAX3263x评估板优势和特性:

　　●● Easily Load and Debug Code Using the SuppliedOlimex ARM-USB-TINY-H JTAG Debugger ConnectedThrough a Standard 20-Pin ARM JTAG Header

　　●● Selectable Power Sources for PMIC Include USBPower Through CN2, External Battery Through J2Connector, or Bench Supply Through Test PointsTP12 and TP13

　　●● Selectable Power Source for On-Board Peripherals(Switches, LEDs, OLED Display, SPI Flash,Bluetooth® LE Transceiver)

　　●● Headers for Accessing MAX3263X I/O Pins andAnalog Front End (AFE) Input Signals

　　●● USB Micro-B Connection to MAX3263x USB DeviceController

　　●● USB Micro-B Connection to USB-UART BridgeSelectable Between MAX3263x Internal UART 0 andUART 1

　　●● MAX3263X Internal Real-Time Clock (RTC)

　　●● On-Board Bluetooth 4.0 BLE Transceiver with ChipAntenna

　　●● General-Purpose Pushbutton Switches and IndicatorLEDs (All Connected to GPIOs) for User I/O

　　●● Prototyping Matrix (0.1in Grid) with Integrated PowerRails for Customer Circuitry

　　MAX3263x评估板包括:

　　●● EV kit board with a MAX3263X microcontroller

　　●● Olimex ARM-USB-TINY-H JTAG debugger with JTAGribbon cable (for connecting from debugger to EV kitheader J1) and USB standard A-to-B cable (for connectingfrom PC to debugger)

　　●● Standard-A to Micro-B USB cable (for connectingfrom PC or standalone USB power supply to EV kitUSB Micro-B connector CN2) allows connection fromPC USB host to MAX3263X USB device controllerperipheral

　　●● Standard-A to Micro-B USB cable (for connecting PCto EV dit USB connector CN1) allows virtual COMport interface to MAX3263X UART 0 or UART 1through a USB/UART bridge

　　图2.MAX3263x评估板外形图

　　MAX3263x评估板材料清单: