CC2500
SWRS040B Page 5 of 92
16.3 AMPLITUDE MODULATION .................................................................................................................35
17 RECEIVED SIGNAL QUALIFIERS AND LINK QUALITY INFORMATION...................................................35
17.1 SYNC WORD QUALIFIER.....................................................................................................................35
17.2 PREAMBLE QUALITY THRESHOLD (PQT)...........................................................................................35
17.3 RSSI...................................................................................................................................................35
17.4 CARRIER SENSE (CS)..........................................................................................................................36
17.5 CLEAR CHANNEL ASSESSMENT (CCA) ..............................................................................................38
17.6 LINK QUALITY INDICATOR (LQI).......................................................................................................38
18 FORWARD ERROR CORRECTION WITH INTERLEAVING........................................................................38
18.1 FORWARD ERROR CORRECTION (FEC)...............................................................................................38
18.2 INTERLEAVING ...................................................................................................................................39
19 RADIO CONTROL ................................................................................................................................40
19.1 POWER-ON START-UP SEQUENCE......................................................................................................40
19.2 CRYSTAL CONTROL............................................................................................................................41
19.3 VOLTAGE REGULATOR CONTROL.......................................................................................................41
19.4 ACTIVE MODES ..................................................................................................................................42
19.5 WAKE ON RADIO (WOR)...................................................................................................................42
19.6 TIMING ...............................................................................................................................................43
19.7 RX TERMINATION TIMER...................................................................................................................44
20 DATA FIFO........................................................................................................................................44
21 FREQUENCY PROGRAMMING ..............................................................................................................45
22 VCO...................................................................................................................................................46
22.1 VCO AND PLL SELF-CALIBRATION ...................................................................................................46
23 VOLTAGE REGULATORS .....................................................................................................................47
24 OUTPUT POWER PROGRAMMING ........................................................................................................47
25 SELECTIVITY ......................................................................................................................................49
26 CRYSTAL OSCILLATOR.......................................................................................................................51
26.1 REFERENCE SIGNAL ...........................................................................................................................51
27 EXTERNAL RF MATCH .......................................................................................................................51
28 PCB LAYOUT RECOMMENDATIONS....................................................................................................52
29 GENERAL PURPOSE /TEST OUTPUT CONTROL PINS ...........................................................................53
30 ASYNCHRONOUS AND SYNCHRONOUS SERIAL OPERATION................................................................55
30.1 ASYNCHRONOUS OPERATION.............................................................................................................55
30.2 SYNCHRONOUS SERIAL OPERATION ...................................................................................................55
31 SYSTEM CONSIDERATIONS AND GUIDELINES .....................................................................................55
31.1 SRD REGULATIONS............................................................................................................................55
31.2 FREQUENCY HOPPING AND MULTI-CHANNEL SYSTEMS.....................................................................56
31.3 WIDEBAND MODULATION NOT USING SPREAD SPECTRUM ................................................................56
31.4 DATA BURST TRANSMISSIONS............................................................................................................56
31.5 CONTINUOUS TRANSMISSIONS ...........................................................................................................56
31.6 CRYSTAL DRIFT COMPENSATION .......................................................................................................57
31.7 SPECTRUM EFFICIENT MODULATION..................................................................................................57
31.8 LOW COST SYSTEMS ..........................................................................................................................57
31.9 BATTERY OPERATED SYSTEMS ..........................................................................................................57
31.10 INCREASING OUTPUT POWER .........................................................................................................57
32 CONFIGURATION REGISTERS ..............................................................................................................58
32.1 CONFIGURATION REGISTER DETAILS –REGISTERS WITH PRESERVED VALUES IN SLEEP STATE ......62
32.2 CONFIGURATION REGISTER DETAILS –REGISTERS THAT LOSE PROGRAMMING IN SLEEP STATE.....81
32.3 STATUS REGISTER DETAILS................................................................................................................82
33 PACKAGE DESCRIPTION (QLP 20)......................................................................................................86
33.1 RECOMMENDED PCB LAYOUT FOR PACKAGE (QLP 20)....................................................................87
33.2 SOLDERING INFORMATION .................................................................................................................87
33.3 TRAY SPECIFICATION .........................................................................................................................87
33.4 CARRIER TAPE AND REEL SPECIFICATION..........................................................................................88
34 ORDERING INFORMATION...................................................................................................................88
35 REFERENCES.......................................................................................................................................88
36 GENERAL INFORMATION ....................................................................................................................89
36.1 DOCUMENT HISTORY .........................................................................................................................89
36.2 PRODUCT STATUS DEFINITIONS .........................................................................................................90
