WirelessUSB使PC外设、游戏控制器、遥控、玩具及其他任何点到点或多点到单点应用都能实现无线连接，并以低成本的2.4-GHz无线解决方案取代有线连接。WirelessUSB系统起着USB人机接口设备(HID)的作用，因此无线连接在操作系统层面上对设计人员是透明的（无需驱动程序）。
基于WirelessUSB的HID解决方案能很好地在用户体验，成本下降和电池寿命的延长方面做出平衡。此外，WirelessUSB还可在各种其它应用（非USB）中实现简便而具有高性价比的无线连接，其中包括工业、消费类电子和医疗类型市场。WirelessUSB LS(TM)是一种10米收发器，而WirelessUSB LR(TM)则是50米距离的收发器。赛普拉斯的推出的WirelessUSB LP(TM)器件如CYRF6939 2.4GHz DSSS无线电收发器汇集了极低功耗,长距离(10米以上)和高数据传输率(1Mbps-GFSK或250Kbps-DSSS)的特点, 以及附加增值的优点,像自动事务序列处理器,集成的升压转换器以及RX & TX缓冲器和AutoRate Receiver (TM)。
WirelessUSB 特性如下：
全球通用
低成本
针对电池供电设备进行了专门优化
双向/单向操作
多点到单点连接
USB HID兼容性
支持同区域多个链接 （co-location）
在噪声环境下性能稳定
无兼容性方面的问题
The CYRF6936 WirelessUSB™ LP radio is a second generation member of Cypress’s WirelessUSB Radio System-On-Chip (SoC) family. The CYRF6936 is interoperable with the first generation CYWUSB69xx devices. The CYRF6936 IC adds a range of enhanced features, including increased operating voltage range, reduced supply current in all operating modes, higher data rate options, and reduced crystal start up, synthesizer settling and link turnaround times.
主要性能:
2.4 GHz Direct Sequence Spread Spectrum (DSSS) radio transceiver
Operates in the unlicensed worldwide Industrial, Scientific and Medical (ISM) band (2.400 GHz–2.483 GHz)
21 mA operating current (Transmit @ –5 dBm)
Transmit power up to +4 dBm
Receive sensitivity up to –97 dBm
Sleep Current <1 μA
Operating range: 10m+
DSSS data rates up to 250 kbps, GFSK data rate of 1 Mbps
Low external component count
Auto Transaction Sequencer (ATS) - no MCU intervention
Framing, Length, CRC16, and Auto ACK
Power Management Unit (PMU) for MCU/Sensor
Fast Startup and Fast Channel Changes
Separate 16-byte Transmit and Receive FIFOs
AutoRate™ - dynamic data rate reception
Receive Signal Strength Indication (RSSI)
Serial Peripheral Interface (SPI) control while in sleep mode
4 MHz SPI microcontroller interface
Battery Voltage Monitoring Circuitry
Supports coin-cell operated applications
Operating voltage from 1.8V to 3.6V
Operating temperature from 0 to 70°C
Space saving 40-pin QFN 6x6 mm package
应用:
Wireless Keyboards and Mice
Wireless Gamepads
Remote Controls
Toys
VOIP and Wireless Headsets
White Goods
Consumer Electronics
Home Automation
Automatic Meter Readers
Personal Health and Entertainment
CYRF6939简化方框图:
下图是应用电路图:
下表是应用电路图中所用的材料清单(BOM):
详情请参阅CYRF6936数据表:
http://mcuol.com/download/upfile/CDB5560-1_DB1.pdf