CC2420

Table of contents

1Abbreviations_________________________________________________________________5

2References ___________________________________________________________________6

3Features _____________________________________________________________________7

4Absolute Maximum Ratings _____________________________________________________8

5Operating Conditions __________________________________________________________8

6Electrical Specifications ________________________________________________________9

6.1Overall ___________________________________________________________________9

6.2Transmit Section ___________________________________________________________9

6.3Receive Section ___________________________________________________________10

6.4RSSI / Carrier Sense _______________________________________________________11

6.5IF Section _______________________________________________________________11

6.6Frequency Synthesizer Section _______________________________________________11

6.7Digital Inputs/Outputs ______________________________________________________12

6.8Voltage Regulator _________________________________________________________13

6.9Battery Monitor ___________________________________________________________13

6.10Power Supply ____________________________________________________________13

7Pin Assignment ______________________________________________________________15

8Circuit Description ___________________________________________________________17

9Application Circuit ___________________________________________________________19

9.1Input / output matching _____________________________________________________19

9.2Bias resistor ______________________________________________________________19

9.3Crystal __________________________________________________________________19

9.4Voltage regulator __________________________________________________________19

9.5Power supply decoupling and filtering _________________________________________19

10IEEE 802.15.4 Modulation Format ____________________________________________24

11Configuration Overview _____________________________________________________25

12Evaluation Software ________________________________________________________26

134-wire Serial Configuration and Data Interface__________________________________27

13.1Pin configuration __________________________________________________________27

13.2Register access____________________________________________________________27

13.3Status byte _______________________________________________________________28

13.4Command strobes _________________________________________________________29

13.5RAM access______________________________________________________________29

13.6FIFO access ______________________________________________________________31

13.7Multiple SPI access ________________________________________________________31

14Microcontroller Interface and Pin Description __________________________________32

14.1Configuration interface _____________________________________________________32

14.2Receive mode ____________________________________________________________33

14.3RXFIFO overflow _________________________________________________________33

14.4Transmit mode____________________________________________________________34

14.5General control and status pins _______________________________________________35

15Demodulator, Symbol Synchroniser and Data Decision ___________________________35

16Frame Format _____________________________________________________________36

16.1Synchronisation header _____________________________________________________36

16.2Length field ______________________________________________________________37

16.3MAC protocol data unit_____________________________________________________37

16.4Frame check sequence______________________________________________________38

SWRS041B

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Texas Instruments 3138 155 232931 manual Table of contents