原标题：Cypress CYW4343WFUTURE物联网云开发方案

　　Cypress公司的CYW4343W是高度集成单片解决方案,提供业界可穿戴,物联网(IoT)网关,家庭自动化和各种手持设备的最低的RBOM.器件包括有2.4 GHz WLAN IEEE 802.11 b/g/n MAC/基带/无线电和支持蓝牙4.1.此外还集成了功率放大器(PA),低噪音放大器(LNA),发送/接收(iTR)RF开关,从而进一步降低解决方案成本和PCB面积.Future公司的NebulaIoT云开发板用来开发无联网(IoT)生态系统.本文介绍了Cypress公司的 CYW4343W主要特性和框图,以及Future公司的NebulaIoT云开发板主要特性,电路图和PCB设计图.

　　The Cypress CYW4343W is a highly integrated single-chip solution and offers the lowest RBOM in the industry for wearables, Internetof Things (IoT) gateways, home automation, and a wide range of other portable devices. The chip includes a 2.4 GHz WLAN IEEE 802.11 b/g/n MAC/baseband/radio and Bluetooth 4.1 support. In addition, it integrates a power amplifier (PA) that meets the outputpower requirements of most handheld systems, a low-noise amplifier (LNA) for best-in-class receiver sensitivity, and an internaltransmit/receive (iTR) RF switch, further reducing the overall solution cost and printed circuit board area.

　　The WLAN host interface supports SDIO v2.0 mode, providing a raw data transfer rate up to 200 Mbps when operating in 4-bit modeat a 50 MHz bus frequency. An independent, high-speed UART is provided for the Bluetooth host interface.Using advanced design techniques and process technology to reduce active and idle power, the CYW4343W is designed to address the needs of highly mobiledevices that require minimal power consumption and compact size. It includes a power management unit that simplifies the systempower topology and allows for operation directly from a rechargeable mobile platform battery while maximizing battery life.

　　The CYW4343W implements the world’s most advanced Enhanced Collaborative Coexistence algorithms and hardware mechanisms,allowing for an extremely collaborative WLAN and Bluetooth coexistence.

　　Cypress CYW4343W主要特性:

　　IEEE 802.11x Key Features

　　■ Single-band 2.4 GHz IEEE 802.11b/g/n.

　　■ Support for 2.4 GHz Cypress TurboQAM® data rates (256-QAM) and 20 MHz channel bandwidth.

　　■ Integrated iTR switch supports a single 2.4 GHz antennashared between WLAN and Bluetooth.

　　■ Supports explicit IEEE 802.11n transmit beamforming

　　■ Tx and Rx Low-density Parity Check (LDPC) support forimproved range and power efficiency.

　　■ Supports standard SDIO v2.0 host interface.

　　■ Supports Space-Time Block Coding (STBC) in the receiver.

　　■ Integrated ARM Cortex-M3 processor and on-chip memory forcomplete WLAN subsystem functionality, minimizing the needto wake up the applications processor for standard WLANfunctions. This allows for further minimization of powerconsumption, while maintaining the ability to field-upgrade withfuture features. On-chip memory includes 512 KB SRAM and640 KB ROM.

　　■ OneDriver™ software architecture for easy migration fromexisting embedded WLAN and Bluetooth devices as well as tofuture devices.

　　Bluetooth Features

　　■ Complies with Bluetooth Core Specification Version 4.1 withprovisions for supporting future specifications.

　　■ Bluetooth Class 1 or Class 2 transmitter operation.

　　■ Supports extended Synchronous Connections (eSCO), forenhanced voice quality by allowing for retransmission ofdropped packets.

　　■ Adaptive Frequency Hopping (AFH) for reducing radiofrequency interference.

　　■ Interface support — Host Controller Interface (HCI) using ahigh-speed UART interface and PCM for audio data.

　　■ Low-power consumption improves battery life of handhelddevices.

　　■ Supports multiple simultaneous Advanced Audio DistributionProfiles (A2DP) for stereo sound.

　　■ Automatic frequency detection for standard crystal and TCXOvalues.

　　General Features

　　■ Supports a battery voltage range from 3.0V to 4.8V with aninternal switching regulator.

　　■ Programmable dynamic power management.

　　■ 4 Kbit One-Time Programmable (OTP) memory for storingboard parameters.

　　■ Can be routed on low-cost 1 x 1 PCB stack-ups.

　　■ 74-ball[4343W+43CS4343W1]74-ball 63-ball WLBGApackage (4.87 mm × 2.87 mm, 0.4 mm pitch).

　　■ 153-bump WLCSP package (115 μm bump diameter, 180 μmbump pitch).

　　■ Security:

　　❐WPA and WPA2 (Personal) support for powerful encryptionand authentication.

　　❐AES in WLAN hardware for faster data encryption and IEEE802.11i compatibility.

　　❐Reference WLAN subsystem provides Cisco Compatible Extensions(CCX, CCX 2.0, CCX 3.0, CCX 4.0, CCX 5.0).

　　❐Reference WLAN subsystem provides Wi–Fi Protected Setup(WPS).

　　■ Worldwide regulatory support: Global products supported withworldwide homologated design.

　　The CYW4343W supports the following WLAN and Bluetooth features:

　　■ IEEE 802.11b/g/n single-band radio with an internal power amplifier, LNA, and T/R switch

　　■ Bluetooth v4.1 with integrated Class 1 PA

　　■ Concurrent Bluetooth, and WLAN operation

　　■ On-chip WLAN driver execution capable of supporting IEEE 802.11 functionality

　　■ Simultaneous BT/WLAN reception with a single antenna

　　■ WLAN host interface options:

　　❐SDIO v2.0, including default and high-speed timing.

　　■ BT UART (up to 4 Mbps) host digital interface that can be used concurrently with the above WLAN host interfaces.

　　■ ECI—enhanced coexistence support, which coordinates BT SCO transmissions around WLAN receptions.

　　■ I2S/PCM for BT audio

　　■ HCI high-speed UART (H4 and H5) transport support

　　■ Wideband speech support (16 bits, 16 kHz sampling PCM, through I2S and PCM interfaces)

　　■ Bluetooth SmartAudio® technology improves voice and music quality to headsets.

　　■ Bluetooth low power inquiry and page scan

　　■ Bluetooth Low Energy (BLE) support

　　■ Bluetooth Packet Loss Concealment (PLC)

　　The CYW4343W supports the following standards:

　　■ Bluetooth 2.1 + EDR

　　■ Bluetooth 3.0

　　■ Bluetooth 4.1 (Bluetooth Low Energy)

　　■ IEEE 802.11n—Handheld Device Class (Section 11)

　　■ IEEE 802.11b

　　■ IEEE 802.11g

　　■ IEEE 802.11d

　　■ IEEE 802.11h

　　■ IEEE 802.11i

　　The CYW4343W will support the following future drafts/standards:

　　■ IEEE 802.11r — Fast Roaming (between APs)

　　■ IEEE 802.11k — Resource Management

　　■ IEEE 802.11w — Secure Management Frames

　　■ IEEE 802.11 Extensions:

　　■ IEEE 802.11e QoS Enhancements (as per the WMM® specification is already supported)

　　■ IEEE 802.11i MAC Enhancements

　　■ IEEE 802.11r Fast Roaming Support

　　■ IEEE 802.11k Radio Resource Measurement

　　The CYW4343W supports the following security features and proprietary protocols:

　　■ Security:

　　❐WEP

　　❐WPA™ Personal

　　❐WPA2™ Personal

　　❐WMM

　　❐WMM-PS (U-APSD)

　　❐WMM-SA

　　❐WAPI

　　❐AES (Hardware Accelerator)

　　❐TKIP (host-computed)

　　❐CKIP (SW Support)

　　■ Proprietary Protocols:

　　❐CCXv2

　　❐CCXv3

　　❐CCXv4

　　❐CCXv5

　　■ IEEE 802.15.2 Coexistence Compliance — on silicon solution compliant with IEEE 3-wire requirements.

　　图1. CYW4343W系统框图

　　图2. CYW4343W框图

　　NebulaIoT云开发板

　　The Nebula™ board is an IoT cloud ready board which allows developers to quickly prototype and deploy their IoT ecosystems.

　　Wireless connectivity is supported by the Murata 1DX module which is powered by the Cypress CYW4343W Wi-Fi (802.11 b/g/n) and Bluetooth Smart Ready (V4.1 +EDR) chipset radio. The module is designed to fit into small spaces and is smaller than a dime. The Nebula™ is driven by the STM32F429 ARM Cortex-M4 Microcontroller and includes 8 Mb of serial flash.

　　The NebulaTMboard supports application development through Cypress’WICED (Wireless Internet Connectivity for Embedded Devices) platform. WICED is the only SDK that combines wireless, MCUs and memory in one environment that runs on Windows, OS X and Linux through Eclipse-based IDE.

　　Equipped to support 4 different interfaces to access the STM32F429 peripherals, the NebulaTMboard enables developers to create any IoT application:

　　ArduinoTM Compatible Shield

　　mikroBUSTM Socket

　　PmodTM Type 2A

　　USB Device

　　The NebulaTMboard has been designed for novices and expert developers alike looking to explore the vast opportunities in IoT appli­cations such as asset tracking, energy man­agement, fitness, lighting controls, HVAC, portable controls, security and building automation.

　　图3.NebulaIoT云开发板外形图

　　图4. NebulaIoT云开发板主要元件分布图

　　NebulaIoT云开发板主要特性:

　　Wireless connectivity is powered by the Murata 1DX module which houses the Cypress-based CYW4343W Wi-Fi and Bluetooth Classic (BR/EDR)/BLE chipset radio STMicroelectronics ARM Cortex-M4 MCU with 32 bit RISC Core, 180 MHz frequency, 2MB Flash, up to 256 kB SRAM

　　8 Mb serial flash

　　Explores easy hardware expandability through a large number of standardized add-on boards via the Arduino™, Pmod™ and mikroBUS™ connectors.

　　Each board focusing on a different application such as motor controls, sensors and wireless connectivity to enable IoT development.

　　Application development supported through Cypress’ WICED (Wireless Internet Connectivity for Embedded Devices) platform

　　WICED is the only SDK for IoT that unites wireless connectivity, MCUs and memory in one integrated platform for Windows®, OS X® and Linux®

　　Includes example projects

　　Offers connectivity to leading cloud services

　　Amazon Web Services

　　IBM Bluemix

　　Alibaba Cloud

　　Microsoft Azure

　　WICED is available to download free of charge at:

　　http://www.cypress.com/products/wiced-software

　　Please note a minimum of WICED studio 5.2 and later is required to ensure compatibility between Nebula and WICED