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EM2420TR Datasheet(PDF) 3 Page - List of Unclassifed Manufacturers |
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3 / 89 page EM2420 Ember Part Number: 120-0049-000 C EM2420 Datasheet Page 3 of 89 Table of contents Abbreviations_____________________________________________________________________5 References _______________________________________________________________________6 Features _________________________________________________________________________7 Absolute Maximum Ratings _________________________________________________________8 Electrical Specifications ____________________________________________________________9 Pin Assignment __________________________________________________________________14 Circuit Description _______________________________________________________________16 Application Circuit _______________________________________________________________18 Input / output matching ___________________________________________________________18 Bias resistor ____________________________________________________________________18 Crystal ________________________________________________________________________18 Voltage regulator________________________________________________________________18 Power supply decoupling and filtering _______________________________________________18 IEEE 802.15.4 Modulation Format __________________________________________________22 Configuration Overview ___________________________________________________________23 Evaluation Software ______________________________________________________________24 4-wire Serial Configuration and Data Interface________________________________________25 Register access _________________________________________________________________25 Status byte _____________________________________________________________________26 Command strobes _______________________________________________________________27 RAM access____________________________________________________________________27 FIFO access ____________________________________________________________________29 Multiple SPI access ______________________________________________________________29 Microcontroller Interface and Pin Description ________________________________________30 Configuration interface ___________________________________________________________30 Receive mode __________________________________________________________________31 RXFIFO overflow _______________________________________________________________31 Transmit mode__________________________________________________________________32 General control and status pins _____________________________________________________32 Demodulator, Symbol Synchronizer and Data Decision _________________________________33 Frame Format ___________________________________________________________________33 Synchronization header ___________________________________________________________34 Length field ____________________________________________________________________35 MAC protocol data unit___________________________________________________________35 Frame check sequence____________________________________________________________35 RF Data Buffering________________________________________________________________37 Buffered transmit mode___________________________________________________________37 Buffered receive mode ___________________________________________________________38 Unbuffered, serial mode __________________________________________________________38 Address Recognition ______________________________________________________________39 Acknowledge Frames _____________________________________________________________40 Radio control state machine ________________________________________________________42 MAC Security Operations (Encryption and Authentication) _____________________________44 Keys__________________________________________________________________________44 |
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