CC2420无线模块用户手册:ZigBee通信技术详解

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"CC2420模块是一款基于2.4GHz IEEE 802.15.4标准的无线通信模块,适用于物联网和通信技术,尤其是ZigBee网络。这款模块由Chipcon(现为TI的一部分)设计,集成了频率调制器、接收器、功率放大器、晶体振荡器和稳压器,具有高度集成和低功耗的特点。" CC2420模块的主要特点: 1. 遵循2.4GHz ISM频段,频率范围为2400-2483.5MHz。 2. 采用0.18微米CMOS工艺,减少外部组件需求,降低整体系统复杂性。 3. 提供了SmartRF03技术,优化了射频性能。 4. 自动前导码生成和CRC校验功能,增强了数据传输的准确性和可靠性。 5. 通过SPI接口进行编程配置,便于用户定制和控制。 6. 低功耗设计,适合电池供电或能量受限的应用场景。 7. 支持最高250kbps的数据传输速率,满足快速通信需求。 模块的应用场合: 1. 物联网设备间的无线通信。 2. ZigBee网络构建,如智能家居、工业自动化和远程监控系统。 3. 传感器网络,用于环境监测、智能电网等。 4. 低功耗无线传感器节点,例如在物流跟踪、资产管理和医疗健康领域。 模块接口和操作: 1. 模块接口包括引脚功能说明,涉及电源、控制信号、数据输入/输出等。 2. 工作模式包括接收和发送,分别有相应的操作流程。 3. 数据发送流程包括FIFO(先进先出)管理,确保数据有序传输。 4. 接收模式下,需设置接收模式并读取FIFO数据来处理接收到的信息。 程序参考设计涉及寄存器读写配置: 1. SPI读操作代码和写操作代码,用于与CC2420进行通信。 2. 寄存器读写配置操作包括配置寄存器读和写,以及RAM的读写操作,这些操作用于设置模块的工作参数和状态。 初始化CC2420模块是关键步骤,包括: 1. 设置初始配置寄存器值,以设定工作频段、信道、功率级别等。 2. FIFO的发送和接收流程,包括写入数据到FIFO和从FIFO读取数据的操作。 无线应用注意事项: 1. 在实际应用中,需要考虑无线通信干扰、信号覆盖范围、功耗管理等问题。 2. 注意模块的天线选择和布局,以优化无线信号质量。 3. 考虑网络拓扑结构和节点间的通信协议。 此外,提供的联系方式方便用户获取技术支持和服务。 总结,CC2420模块作为一款高性能、低功耗的无线通信解决方案,适用于各种物联网和ZigBee应用,其全面的接口和配置选项使得开发者能够灵活地设计和实现无线通信系统。

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TI公司的无线传感芯片cc2420使用手册 目录参考 Table of contents 1 Abbreviations_________________________________________________________________5 2 References ___________________________________________________________________6 3 Features _____________________________________________________________________7 4 Absolute Maximum Ratings _____________________________________________________8 5 Operating Conditions __________________________________________________________8 6 Electrical Specifications ________________________________________________________9 6.1 Overall___________________________________________________________________9 6.2 Transmit Section ___________________________________________________________9 6.3 Receive Section ___________________________________________________________10 6.4 RSSI / Carrier Sense _______________________________________________________11 6.5 IF Section _______________________________________________________________11 6.6 Frequency Synthesizer Section _______________________________________________11 6.7 Digital Inputs/Outputs ______________________________________________________12 6.8 Voltage Regulator _________________________________________________________13 6.9 Battery Monitor ___________________________________________________________13 6.10 Power Supply ____________________________________________________________13 7 Pin Assignment ______________________________________________________________15 8 Circuit Description ___________________________________________________________17 9 Application Circuit ___________________________________________________________19 9.1 Input / output matching _____________________________________________________19 9.2 Bias resistor ______________________________________________________________19 9.3 Crystal __________________________________________________________________19 9.4 Voltage regulator__________________________________________________________19 9.5 Power supply decoupling and filtering _________________________________________19 10 IEEE 802.15.4 Modulation Format ____________________________________________24 11 Configuration Overview _____________________________________________________25 12 Evaluation Software ________________________________________________________26 13 4-wire Serial Configuration and Data Interface__________________________________27 13.1 Pin configuration __________________________________________________________27 13.2 Register access____________________________________________________________27 13.3 Status byte _______________________________________________________________28 13.4 Command strobes _________________________________________________________29 13.5 RAM access______________________________________________________________29 13.6 FIFO access ______________________________________________________________31 13.7 Multiple SPI access ________________________________________________________31 14 Microcontroller Interface and Pin Description __________________________________32 14.1 Configuration interface _____________________________________________________32 14.2 Receive mode ____________________________________________________________33 14.3 RXFIFO overflow _________________________________________________________33 14.4 Transmit mode____________________________________________________________34 14.5 General control and status pins _______________________________________________35 15 Demodulator, Symbol Synchroniser and Data Decision ___________________________35 16 Frame Format _____________________________________________________________36 16.1 Synchronisation header _____________________________________________________36 16.2 Length field ______________________________________________________________37 16.3 MAC protocol data unit_____________________________________________________37 16.4 Frame check sequence______________________________________________________38 CC2420 CC2420 Datasheet (rev 1.3), 2005-10-03 Page 3 of 90 17 RF Data Buffering__________________________________________________________39 17.1 Buffered transmit mode_____________________________________________________39 17.2 Buffered receive mode _____________________________________________________40 17.3 Un-buffered, serial mode____________________________________________________40 18 Address Recognition ________________________________________________________41 19 Acknowledge Frames _______________________________________________________42 20 Radio control state machine __________________________________________________44 21 MAC Security Operations (Encryption and Authentication) _______________________46 21.1 Keys____________________________________________________________________46 21.2 Nonce / counter ___________________________________________________________46 21.3 Stand-alone encryption _____________________________________________________47 21.4 In-line security operations ___________________________________________________47 21.5 CTR mode encryption / decryption ____________________________________________48 21.6 CBC-MAC_______________________________________________________________48 21.7 CCM ___________________________________________________________________48 21.8 Timing __________________________________________________________________49 22 Linear IF and AGC Settings__________________________________________________49 23 RSSI / Energy Detection _____________________________________________________49 24 Link Quality Indication _____________________________________________________50 25 Clear Channel Assessment ___________________________________________________51 26 Frequency and Channel Programming _________________________________________51 27 VCO and PLL Self-Calibration _______________________________________________52 27.1 VCO____________________________________________________________________52 27.2 PLL self-calibration________________________________________________________52 28 Output Power Programming _________________________________________________52 29 Voltage Regulator __________________________________________________________52 30 Battery Monitor____________________________________________________________53 31 Crystal Oscillator __________________________________________________________54 32 Input / Output Matching ____________________________________________________55 33 Transmitter Test Modes _____________________________________________________55 33.1 Unmodulated carrier _______________________________________________________55 33.2 Modulated spectrum _______________________________________________________56 34 System Considerations and Guidelines _________________________________________58 34.1 Frequency hopping and multi-channel systems___________________________________58 34.2 Data burst transmissions ____________________________________________________58 34.3 Crystal accuracy and drift ___________________________________________________58 34.4 Communication robustness __________________________________________________58 34.5 Communication security ____________________________________________________58 34.6 Low cost systems__________________________________________________________59 34.7 Battery operated systems ____________________________________________________59 34.8 BER / PER measurements ___________________________________________________59 35 PCB Layout Recommendations _______________________________________________60 36 Antenna Considerations _____________________________________________________60 37 Configuration Registers _____________________________________________________62 38 Test Output Signals _________________________________________________________82 39 Package Description (QLP 48) ________________________________________________84 40 Recommended layout for package (QLP 48) ____________________________________85 CC2420 CC2420 Datasheet (rev 1.3), 2005-10-03 Page 4 of 90 40.1 Package thermal properties __________________________________________________85 40.2 Soldering information ______________________________________________________85 40.3 Plastic tube specification ____________________________________________________86 40.4 Carrier tape and reel specification _____________________________________________86 41 Ordering Information _______________________________________________________86 42 General Information ________________________________________________________87 42.1 Document History _________________________________________________________87 42.2 Product Status Definitions___________________________________________________89 42.3 Disclaimer _______________________________________________________________89 42.4 Trademarks ______________________________________________________________89 42.5 Life Support Policy ________________________________________________________89 43 Address Information ________________________________________________________90
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