原标题：Microchip RN4020低功耗蓝牙4.1兼容模块解决方案

　　Microchip公司的RN4020是蓝牙4.1兼容的低功耗模块,是完整的蓝牙解决方案:集成了堆栈,满足所有的蓝牙SIG标准和内置天线.典型发送功率7.0dBm,RX灵敏度 -92.5dBm,采用UART通信接口,尺寸为11.5 x 19.5 x 2.5 mm.工作电压3.0V-3.6V,主要用在医疗保健设备,运动场和健身设备,零售设备,物联网传感器标签,遥控,可穿戴智能设备和附件等.本文介绍了RN4020主要特性,框图和引脚框图,以及RN4020 PICtail™/PICtail Plus演示板主要特性和电路图.

　　Microchip’s RN4020 Bluetooth Low Energy Module provides a highly integrated solution for delivering low power Bluetooth 4.1 solutions. The advanced command interface offers rapid time to market.

　　The RN4020 module complies with Bluetooth specification version 4.1. It integrates RF, a baseband controller, command API processor, making it a complete Bluetooth Low Energy Solution.

　　The RN4020 can be used with either low cost microcontroller for intelligent Bluetooth Low Energy applications.

　　For simple sensor applications, the RN4020 internal scripting capabilities enable basic functions to be implemented without the need for external host MCU or software development tools.

　　图1. RN4020模块外形图

　　RN4020主要特性:

　　• Fully qualified Bluetooth® version 4.1 module

　　• Onboard Bluetooth Low Energy 4.1 stack

　　• ASCII command interface API over UART

　　• Compact form factor 11.5 x 19.5 x 2.5 mm

　　• Castellated SMT pads for easy and reliable PCB mounting

　　• Environmentally friendly, RoHS compliant

　　• Certifications: FCC, IC, CE, QDID

　　• Device Firmware Upgrade (DFU) over UART or Over the Air (OTA)

　　• Microchip Low-energy Data Profile (MLDP) for serial data applications

　　• Remote commands over the air

　　Operational

　　• Single operating voltage: 3.0V to 3.6V (3.3V typical)

　　• Temperature range: -30℃ to 85℃

　　• Low-power consumption

　　• Simple, UART interface

　　• Integrated Crystal, Internal Voltage Regulator, Matching Circuitry, Memory Amplifier, and PCB

　　Antenna

　　• Multiple IOs for control and status

　　• UART interface, GPIO, ADC

　　• 64 KB internal serial flash

　　RF/Analog Features

　　• ISM Band 2.402 to 2.480 GHz operation

　　• Channels 0-39

　　• Rx Sensitivity: -92.5 dBm at 0.1% BER

　　• Tx Power: +7 dBm

　　• RSSI monitor

　　MAC/Baseband/Higher Layer Features

　　• Secure AES128 encryption

　　• GAP, GATT, SM, L2CAP and integrated public profiles

　　• Create custom services using command API

　　• Keyboard I/O Authentication

　　• Software configurable role as peripheral or central, client or server

　　RN4020应用:

　　• Health/Medical Devices

　　- Glucose Meters

　　- Heart rate

　　- Scale

　　• Sports Activity and Fitness

　　- Pedometer

　　- Cycling computer

　　- Heart rate

　　• Retail

　　- POS

　　- Asset tagging and tracking

　　- Proximity Advertising

　　• Beacon applications

　　• Internet of Things Sensor tag

　　• Industrial Control

　　- Private (custom) services

　　- Low bandwidth cable replacement

　　Smart Energy/Smart Home

　　图2. RN4020框图

　　图3. RN4020模块引脚框图

　　RN4020 PICtail™/PICtail Plus板

　　The RN4020 PICtail / PICtail Plus Board is a Bluetooth® Low Energy demonstration board that showcases the Microchip RN4020 module, a fully-certified Bluetooth Version 4.1 low energy module for designers who want to easily add low power wireless capability to their products. This flexible development board includes the RN4020 paired with an eXtreme Low Power PIC18F25K50 microcontroller.

　　This convenient development board includes a USB to UART interface for plug-and-play capability. The high-speed UART interface and the General Purpose Input Output (GPIO) ports are available on the RN4020 module to configure, control and transfer data. The RN-4020-PICtail also includes PICtail and PICtail Plus interfaces for connecting to Microchip development boards. The on-board PIC18 microcontroller can be custom programmed via the available PICkit serial programmer / debugger interface. The board also includes on-board connection and data status LEDs enabling rapid prototyping and fast time to market

　　RN4020 PICtail™/PICtail Plus板主要特性:

　　Enables flexible development with the RN4020 BTLE Module

　　USB to UART Interface, to quickly get started

　　Connection and data status LEDs

　　PICtail™ and PICtail Plus interfaces for connection to Microchip development boards

　　eXtreme Low Power PIC18F25K50 MCU on-board

　　PICkit™ serial programmer / debugger interface

　　Multiple options for programming and experimentation

　　图4. RN4020 PICtail™/PICtail Plus板外形图