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CC2420
SWRS041B Page 2 of 89
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