原标题：NXP QN9020超低功耗蓝牙(BLE)系统级芯片解决方案

　　NXP公司的QN902x系列产品是超低功耗高性能和高度集成的蓝牙(BLE)系统级芯片(SoC),集成了BLE无线电(2400MHz-2483.5MHz),控制器,协议堆栈和基本应用软件,空中数据速率1Mbps,间隔250kHz.此外还集成了高性能MCU和存储器,支持用于开发单片无线MCU解决方案.主要用于运动和健身设备,医疗保健,遥控,智能手机配件,PC外设和无线传感器网络(WSN).本文介绍了QN902x系列主要特性和优势,框图和多种应用电路及所用外接元件, 开发板QN9020DK主要特性,电路图和PCB元件布局图.

　　QN902x is an ultra low power, high performance and highly integrated Bluetooth LE solution. It is used in Bluetooth Smart applications such as sports and fitness, human interface devices, and app-enabled smart accessories. It is specially designed for

　　wearable electronics and can run on a small capacity battery such as a coin cell battery.

　　QN902x integrates a Bluetooth LE radio, controller, protocol stack and profile software on

　　a single chip, providing a flexible and easy to use Bluetooth LE SoC solution. It also has a

　　high performance MCU and an on-chip memory that can support users to develop a

　　single-chip wireless MCU solution. Users can also utilize QN902x as a network processor

　　by connecting to an application processor for more advanced applications.

　　Additional system features include fully integrated DC-to-DC converter and LDO,

　　low-power sleep timer, battery monitor, general-purpose ADC, and GPIOs. These features

　　reduce overall system cost and size. QN902x has very low power consumption in all

　　modes. It enables long life in battery-operated systems while maintaining excellent RF

　　performance. QN9020/1 operates with a power supply range of 2.4 V to 3.6 V. The

　　QN9022 operates with a power supply range of 1.8 V to 3.6 V.

　　QN902x系列主要特性和优势:

　　 True single-chip Bluetooth LE SoC solution

　　 Integrated Bluetooth LE radio

　　 Complete Bluetooth LE protocol stack and application profiles

　　 Supports both master and slave modes

　　 Up to eight simultaneous links in master mode

　　 frequency bands: 2400 MHz to 2483.5 MHz

　　 1 Mbit/s on air data rate and 250 kHz deviation

　　 GFSK modulation format

　　 RF

　　 95 dBm RX sensitivity (non-DC-to-DC mode)

　　 93 dBm RX sensitivity (DC-to-DC mode)

　　 TX output power from 20 dBm to +4 dBm

　　 Fast and reliable RSSI and channel quality indication

　　 Compatible with worldwide radio frequency regulations

　　 Excellent link budget up to 99 dB

　　 Very low power consumption

　　 Single power supply of 2.4 V to 3.6 V for QN9020/1

　　 Single power supply of 1.8 V to 3.6 V for QN9022

　　 Integrated DC-to-DC converter and LDO

　　 2 uA deep sleep mode

　　 3 uA sleep mode (32 kHz RC oscillator on)

　　 9.25 mA RX current with DC-to-DC converter

　　 8.8 mA TX current @0 dBm TX power with DC-to-DC converter

　　 Compact 6 mm x 6 mm HVQFN48 package for QN9020, 5 mm x 5 mm HVQFN32

　　package for QN9021, and 5 mm x 5 mm HVQFN40 package for QN9022

　　 Microcontroller

　　 Integrated 32-bit ARM Cortex-M0 MCU

　　 64 kB system memory

　　 User-controllable code protection

　　 High-level integration

　　 4-channel, 10-bit general-purpose ADC

　　 Two general-purpose analog comparators

　　 31 GPIO pins for QN9020, 15 GPIO pins for QN9021, and 22 GPIO pins for

　　QN9022

　　 GPIO pins can be used as interrupt sources

　　 Four general-purpose timers

　　 32 kHz sleep timer

　　 Watchdog timer

　　 Real-time clock with calibration

　　 2-channel programmable PWM

　　 Two SPI/UART interfaces

　　 I2C-bus master/slave interface

　　 Brownout detector

　　 Battery monitor

　　 AES-128 security coprocessor

　　 16 MHz or 32 MHz crystal oscillator

　　 Low power 32 kHz RC oscillator

　　 32.768 kHz crystal oscillator

　　QN902x系列应用:

　　 Sports and fitness

　　 Healthcare and medical

　　 Remote control

　　 Smartphone accessories

　　 PC peripherals (mouse and keyboard)

　　 Wireless sensor networks

　　图1. QN902x系列框图

　　图2. QN9020带DC/DC转换器典型应用电路

　　图3. QN9020不带DC/DC转换器典型应用电路

　　图4. QN9021带DC/DC转换器典型应用电路

　　图5. QN9021不带DC/DC转换器典型应用电路

　　图6. QN9022带DC/DC转换器典型应用电路

　　图7. QN9022不带DC/DC转换器典型应用电路

　　QN902x系列产品应用电路外接元件列表:

　　开发板QN9020DK

　　The QN9020DK board is designed to make it as easy as possible to get started with your project based on NXP QN9020 BLE SOC.

　　The QN9020DK board integrates buttons, Piezo buzzer, LED for easy way to reset chip and indicate chip status. The DK board also provides useful interfaces such as USB port for UART communication and JLink debug, GPIO sensor.

　　图8. 开发板QN9020DK外形图

　　开发板QN9020DK主要特性:

　　Contains Jlink-OB offering SWD and UART interfaces for QN9020 debug and communication

　　Mini USB port for power and communication port

　　Power source select jumper used for power source selection

　　Current measurement jumpers used for measuring the QN9020 device power consumption

　　Button1/2 used as input

　　LED1/2 used as output to indicate QN9020 status

　　Extended QN9020 GPIO Port used for interface extension

　　UART interface used as communication port for QN9020 device

　　Kit Contains

　　QN9020 DK Board

　　QN9020 USB dongle

　　USB cable