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上传时间: 2010-10-25
详细说明： 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 ...展开收缩
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