CC2500 datasheet(4/76 Pages) TI

4 / 76 page

CC2500

Preliminary Data Sheet (rev.1.1.)

SWRS040

Page 4 of 77

RECEIVED SIGNAL QUALIFIERS AND LINK QUALITY INFORMATION .....................30

17.1

SYNC WORD QUALIFIER.....................................................................................................................30

17.2

PREAMBLE QUALITY THRESHOLD (PQT) ...........................................................................................30

17.3

RSSI...................................................................................................................................................30

17.4

CARRIER SENSE (CS)..........................................................................................................................31

17.5

CLEAR CHANNEL ASSESSMENT (CCA) ..............................................................................................32

17.6

LINK QUALITY INDICATOR (LQI).......................................................................................................32

FORWARD ERROR CORRECTION WITH INTERLEAVING ..............................................33

18.1

FORWARD ERROR CORRECTION (FEC)...............................................................................................33

18.2

INTERLEAVING ...................................................................................................................................33

RADIO CONTROL.........................................................................................................................34

19.1

POWER-ON START-UP SEQUENCE ......................................................................................................35

19.2

CRYSTAL CONTROL............................................................................................................................35

19.3

VOLTAGE REGULATOR CONTROL.......................................................................................................35

19.4

ACTIVE MODES ..................................................................................................................................35

19.5

WAKE ON RADIO (WOR)...................................................................................................................36

19.6

TIMING ...............................................................................................................................................37

19.7

RX TERMINATION TIMER ...................................................................................................................37

DATA FIFO .....................................................................................................................................38

FREQUENCY PROGRAMMING.................................................................................................39

VCO ..................................................................................................................................................40

22.1

VCO AND PLL SELF-CALIBRATION ...................................................................................................40

VOLTAGE REGULATORS ..........................................................................................................40

OUTPUT POWER PROGRAMMING .........................................................................................40

SELECTIVITY GRAPHS ..............................................................................................................42

CRYSTAL OSCILLATOR.............................................................................................................44

26.1

REFERENCE SIGNAL ...........................................................................................................................44

EXTERNAL RF MATCH ..............................................................................................................45

GENERAL PURPOSE / TEST OUTPUT CONTROL PINS ......................................................45

ASYNCHRONOUS AND SYNCHRONOUS SERIAL OPERATION .......................................47

29.1

ASYNCHRONOUS OPERATION..............................................................................................................47

29.2

SYNCHRONOUS SERIAL OPERATION ....................................................................................................47

SYSTEM CONSIDERATIONS AND GUIDELINES ..................................................................47

30.1

SRD REGULATIONS............................................................................................................................47

30.2

FREQUENCY HOPPING AND MULTI-CHANNEL SYSTEMS.....................................................................47

30.3

DATA BURST TRANSMISSIONS............................................................................................................48

30.4

CONTINUOUS TRANSMISSIONS ...........................................................................................................48

30.5

CRYSTAL DRIFT COMPENSATION .......................................................................................................48

30.6

SPECTRUM EFFICIENT MODULATION..................................................................................................48

30.7

LOW COST SYSTEMS ..........................................................................................................................49

30.8

BATTERY OPERATED SYSTEMS ..........................................................................................................49

30.9

INCREASING OUTPUT POWER .............................................................................................................49

CONFIGURATION REGISTERS.................................................................................................49

31.1

CONFIGURATION REGISTER DETAILS – REGISTERS WITH PRESERVED VALUES IN SLEEP STATE ..........54

31.2

CONFIGURATION REGISTER DETAILS – REGISTERS THAT LOSE PROGRAMMING IN SLEEP STATE ........69

31.3

STATUS REGISTER DETAILS.................................................................................................................70

PACKAGE DESCRIPTION (QLP 20)..........................................................................................73

32.1

RECOMMENDED PCB LAYOUT FOR PACKAGE (QLP 20) .....................................................................74

32.2

PACKAGE THERMAL PROPERTIES ........................................................................................................74

32.3

SOLDERING INFORMATION..................................................................................................................74

32.4

TRAY SPECIFICATION..........................................................................................................................74

32.5

CARRIER TAPE AND REEL SPECIFICATION ...........................................................................................75

ORDERING INFORMATION.......................................................................................................75

GENERAL INFORMATION.........................................................................................................75

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