CC2640R2F蓝牙低功耗无线MCU参考设计

TI公司的CC2640R2F是SimpleLink™ Bluetooth®蓝牙低功耗无线MCU，包括32位ARM®Cortex®-M3核，主处理器运行在48MHz，具有丰富的外设备特性包括独特的超低功耗传感器控制器，主要用在家庭和建筑物自动化，工业领域如物流和生产自动化，健康和医疗，销售，运动和健身以及HID.本文介绍了CC2640R2F主要特性，框图，差分和单端应用电路，以及参考设计TIDA-01624主要特性，框图和主要指标，电路图，材料清单和PCB设计图。

The CC2640R2F device is a wireless microcontroller （MCU） targeting Bluetooth® 4.2 and Bluetooth 5 lowenergyapplications.

The device is a member of the SimpleLink™ ultra-low power CC26xx family of cost-effective， 2.4-GHz RFdevices. Very low active RF and MCU current and low-power mode current consumption provide excellentbattery lifetime and allow for operation on small coin cell batteries and in energy-harvesting applications.

The SimpleLink Bluetooth low energy CC2640R2F device contains a 32-bit ARM® Cortex®-M3 core thatruns at 48 MHz as the main processor and a rich peripheral feature set that includes a unique ultra-lowpower sensor controller. This sensor controller is ideal for interfacing external sensors and for collectinganalog and digital data autonomously while the rest of the system is in sleep mode. Thus， the CC2640R2Fdevice is great for a wide range of applications where long battery lifetime， small form factor， and ease ofuse is important.

The power and clock management and radio systems of the CC2640R2F wireless MCU require specificconfiguration and handling by software to operate correctly， which has been implemented in the TI-RTOS.

TI recommends using this software framework for all application development on the device. The completeTI-RTOS and device drivers are offered in source code free of charge from

Bluetooth low energy controller and host libraries are embedded in ROM and run partly on an ARM®Cortex®-M0 processor. This architecture improves overall system performance and power consumptionand frees up significant amounts of flash memory for the application.

The Bluetooth stack is available free of charge from

CC2640R2F主要特性：

• Microcontroller

– Powerful ARM® Cortex®-M3

– EEMBC CoreMark® Score： 142

– Up to 48-MHz Clock Speed

– 275KB of Nonvolatile Memory Including 128KBof In-System Programmable Flash

– Up to 28KB of System SRAM， of Which 20KB isUltra-Low Leakage SRAM

– 8KB of SRAM for Cache or System RAM Use

– 2-Pin cJTAG and JTAG Debugging

– Supports Over-The-Air Upgrade （OTA）

• Ultra-Low Power Sensor Controller

– Can Run Autonomous From the Rest of theSystem

– 16-Bit Architecture

– 2KB of Ultra-Low Leakage SRAM for Code andData

• Efficient Code Size Architecture， Placing Drivers，TI-RTOS， and Bluetooth® Software in ROM toMake More Flash Available for the Application

• RoHS-Compliant Packages

– 2.7-mm × 2.7-mm YFV DSBGA34 （14 GPIOs）

– 4-mm × 4-mm RSM VQFN32 （10 GPIOs）

– 5-mm × 5-mm RHB VQFN32 （15 GPIOs）

– 7-mm × 7-mm RGZ VQFN48 （31 GPIOs）

• Peripherals

– All Digital Peripheral Pins Can Be Routed toAny GPIO

– Four General-Purpose Timer Modules（Eight 16-Bit or Four 32-Bit Timers， PWM Each）

– 12-Bit ADC， 200-ksamples/s， 8-Channel AnalogMUX

– Continuous Time Comparator

– Ultra-Low-Power Analog Comparator

– Programmable Current Source

– UART

– 2× SSI （SPI， MICROWIRE， TI）

– I2C

– I2S

– Real-Time Clock （RTC）

– AES-128 Security Module

– True Random Number Generator （TRNG）

– 10， 14， 15， or 31 GPIOs， Depending onPackage Option

– Support for Eight Capacitive-Sensing Buttons

– Integrated Temperature Sensor

• External System

– On-Chip internal DC-DC Converter

– Very Few External Components

– Seamless Integration With the SimpleLink™CC2590 and CC2592 Range Extenders

– Pin Compatible With the SimpleLink CC13xx in4-mm × 4-mm and 5-mm × 5-mm VQFN Packages

• Low Power

– Wide Supply Voltage Range

– Normal Operation： 1.8 to 3.8 V

– External Regulator Mode： 1.7 to 1.95 V

– Active-Mode RX： 5.9 mA

– Active-Mode TX at 0 dBm： 6.1 mA

– Active-Mode TX at +5 dBm： 9.1 mA

– Active-Mode MCU： 61 μA/MHz

– Active-Mode MCU： 48.5 CoreMark/mA

– Active-Mode Sensor Controller:0.4mA + 8.2 μA/MHz

– Standby： 1.1 μA （RTC Running and RAM/CPURetention）

– Shutdown： 100 nA （Wake Up on ExternalEvents）

• RF Section

– 2.4-GHz RF Transceiver Compatible WithBluetooth low energy （BLE） 4.2 and 5

Specifications

– Excellent Receiver Sensitivity （–97 dBm forBLE）， Selectivity， and Blocking Performance

– Link Budget of 102 dB for BLE

– Programmable Output Power up to +5 dBm

– Single-Ended or Differential RF Interface

– Suitable for Systems Targeting Compliance WithWorldwide Radio Frequency Regulations

– ETSI EN 300 328 （Europe）

– EN 300 440 Class 2 （Europe）

– FCC CFR47 Part 15 （US）

– ARIB STD-T66 （Japan）

• Tools and Development Environment

– Full-Feature Development Kits

– Multiple Reference Designs

– SmartRF™ Tools Portfolio

– Sensor Controller Studio

– IAR Embedded Workbench® for ARM

– Code Composer Studio™

– CCS Cloud

CC2640R2F应用：

• Home and Building Automation

– Connected Appliances

– Lighting

– Locks

– Gateways

– Security Systems

• Industrial

– Logistics

– Production and Manufacturing Automation

– Asset Tracking and Management

– HMI and Remote Display

– Access Control

• Retail

– Beacons

– Advertising

– ESL and Price Tags

– Point of Sales and Payment Systems

• Health and Medical

– Thermometers

– SpO2

– Blood Glucose and Pressure Meters

– Weight Scales

– Hearing Aids

• Sports and Fitness

– Activity Monitors and Fitness Trackers

– Heart Rate Monitors

– Running and Biking Sensors

– Sports Watches

– Gym Equipment

– Team Sports Equipment

• HID

– Voice Remote Controls

– Gaming

– Keyboards and Mice

图1.CC2640R2F框图

图1.CC2640R2F 5x5外接差分（5XD）应用电路

图2.CC2640R2F 4x4外接单端（4XS）应用电路

参考设计TIDA-01624

This reference design demonstrates highly-accuratesensing of skin temperature using the TMP117 highprecisiondigital temperature sensor with theCC2640R2F wireless MCU. This users guide providesdesign guidance for skin temperature measurement inmedical and wearable applications along with anevaluation software and smart device application.

With the need to integrate sensors into newer wireless and cloud applications， the Bluetooth-enabled，high-accuracy skin temperature measurement flex patch provides a wireless solution for receiving highaccuracy skin temperature measurements on a Bluetooth-capable device， such as a smartphone or tablet.Through direct contact with the skin，the TMP117 high-accuracy， low-power， digital temperature sensorcan send 16-bit digital output data through the I²C to a CC2640R2F SimpleLink™ Bluetooth low energy （BLE） wireless microcontroller （MCU）。 After collecting this data， the CC2640R2F can use Bluetoothprotocol to transmit the data to a Bluetooth-connected device.

The patch operates on a 3-V， flexible thin-film battery， which is made possible due to the very low powerconsumption of the design components. For testing and demonstration purposes， the designer can usethe large contact pads of the device to receive external power from other sources when a battery is notconnected.

There are two primary modes of operation for the patch： active and inactive mode. When the patch isinactive， the CC2640R2F enters a complete shutdown state and the TMP117 is powered down. Thismode allows a 3-year shelf life for the patch without a significant depletion of stored energy in the battery.

When the designer presses the wake-up switch， the flex patch enters active mode and the TMP117begins reading and auto-advertising temperature data the CC2640R2F BLE device can receive.

When the designer uses the software as designed， the only way to return the patch from active modeback to inactive mode is to remove and reapply the device power. In healthcare applications， reuse orextended use of monitoring patches may pose risks to patient health due to hygiene concerns. Thesoftware for this patch was created with the intent to make the design disposable so that each patch canonly be used once. An alternative for temperature-monitoring systems is to use a removable covering thatcan be disposed of after use. This is common in designs of probe-type thermometers for oral temperaturemeasurements. If this method is used， the system and these covers must be characterized as the finaldesign. For probes， the designer can modify the software to move between active and inactive mode， butan MCU must be in the probe to use Bluetooth communication protocol under this modification.

参考设计TIDA-01624主要特性：

• High accuracy （±0.1℃） temperature measurementaround human body temperature

• 2.4-GHz RF transceiver compatible with Bluetooth®low energy （BLE） 4.2 and 5 specifications

• Integrated PCB antenna

• Flexible PCB design

• Up to 3 years of shelf life along with 5 days ofactive time

• iOS app for device monitoring

参考设计TIDA-01624应用：

• Medical devices

• Healthcare

• Wearables

图3.参考设计TIDA-01624外形图

参考设计TIDA-01624主要系统指标：

图4.参考设计TIDA-01624框图

图5.参考设计TIDA-01624布局图主要特性

图6.参考设计TIDA-01624电路图

参考设计TIDA-01624材料清单：

图7.参考设计TIDA-01624 PCB设计图（1）

图8.参考设计TIDA-01624 PCB设计图（2）

图9.参考设计TIDA-01624 PCB设计图（3）

图10.参考设计TIDA-01624 PCB设计图（4）

图11.参考设计TIDA-01624 PCB设计图（5）

图12.参考设计TIDA-01624 PCB设计图（6）

图13.参考设计TIDA-01624 PCB设计图（7）

图14.参考设计TIDA-01624 PCB设计图（8）

This reference design demonstrates highly-accurate sensing of skin-temperature using the TMP117 high precision digital temperature sensor with CC2640R2F wireless MCU. This users guide provides design guidance for skin temperature measurement in medical and wearable applications along with an evaluation software and smart device application.

Features

This reference design demonstrates highly-accurate sensing of skin-temperature using the TMP117 high precision digital temperature sensor with CC2640R2F wireless MCU. This users guide provides design guidance for skin temperature measurement in medical and wearable applications along with an evaluation software and smart device application.

Applications

Electronic thermometer

Smart patches （non-medical）