EM2420 Просмотр технического описания (PDF) - Unspecified
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EM2420 Datasheet PDF : 89 Pages
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EM2420
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
Ember Part Number: 120-0049-000C
EM2420 Datasheet
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