CC2420中文手册:2.4GHz ZigBee RF收发器详解与特性

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CC2420中文手册是一份详尽的指南,针对2.4GHz IEEE 802.15.4标准的无线传感器网络(WSN)应用。这份手册特别适合那些专注于ZigBee技术的开发者,它提供了全面的技术细节和操作指导。 首先,CC2420是一款功能强大的RF无线电收发器,工作在2.4GHz频段,支持IEEE 802.15.4标准,这是物联网(IoT)和智能家居领域常用的一种无线通信协议,其特点是数据传输速率高达250kbps,且采用高效的2MChip/s码片速率。它采用O-QPSK(正交幅度调制)调制方式,能提供低功耗和高数据传输效率。 手册详细介绍了CC2420的关键部分,如操作条件、引脚分配、电路描述等。在电路设计方面,手册涵盖了输入/输出匹配、偏压电阻设置、晶振选择、电压调制器的使用、以及电源去耦和滤波等,确保设备的稳定运行。此外,还深入解析了IEEE 802.15.4调制格式,包括配置方法、数据接口和串行通信。 在微控制器接口部分,手册讨论了配置接口、接收和发送模式,以及如何处理RXFIFO溢出。通用控制和状态引脚的使用也被详尽说明,这对于理解和操作CC2420的接口至关重要。帧格式部分阐述了同步头、长度域、MAC协议数据单元和帧检查序列,这些是构建有效通信的基础。 CC2420还具备RF数据缓存功能,支持多种工作模式,包括缓存发送、缓存接收和非缓存串行模式,这提供了灵活的数据处理选项。此外,手册还涉及地址识别、响应帧的处理,以及无线控制状态机的详细介绍,帮助用户理解设备的无线通信逻辑。 在硬件配置方面,手册覆盖了15线性IF和自动增益控制(AGC)设置,以及RSSI(接收信号强度指示)和能量检测功能,这些有助于优化无线信号质量和网络性能。链接质量指示、空闲信道评估、频率和信道编程等内容为网络规划提供了关键信息。 最后,手册探讨了系统设计要考虑的因素,包括跳频和多通道系统、数据突发传输、晶体精度与漂移对通信的影响,以及提高通讯健壮性、安全性、低功耗和电池管理等高级特性。同时,还介绍了一套完整的配置寄存器,供开发者进行定制和优化。 CC2420中文手册不仅提供了一个强大的工具集,还是一份深入浅出的教程,为无线传感器网络的设计和实施提供了全面的指导。无论是初次接触ZigBee还是经验丰富的开发人员,都能从中受益良多。
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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