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CC2500RTKR Datasheet(PDF) 5 Page - Texas Instruments |
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CC2500RTKR Datasheet(HTML) 5 Page - Texas Instruments |
5 / 99 page CC2500 SWRS040C Page 5 of 89 16.3 AMPLITUDE MODULATION .................................................................................................................34 17 RECEIVED SIGNAL QUALIFIERS AND LINK QUALITY INFORMATION...................................................34 17.1 SYNC WORD QUALIFIER.....................................................................................................................34 17.2 PREAMBLE QUALITY THRESHOLD (PQT) ........................................................................................... 34 17.3 RSSI...................................................................................................................................................34 17.4 CARRIER SENSE (CS).......................................................................................................................... 35 17.5 CLEAR CHANNEL ASSESSMENT (CCA) .............................................................................................. 37 17.6 LINK QUALITY INDICATOR (LQI) .......................................................................................................37 18 FORWARD ERROR CORRECTION WITH INTERLEAVING........................................................................37 18.1 FORWARD ERROR CORRECTION (FEC)............................................................................................... 37 18.2 INTERLEAVING ...................................................................................................................................37 19 RADIO CONTROL ................................................................................................................................ 39 19.1 POWER-ON START-UP SEQUENCE ......................................................................................................39 19.2 CRYSTAL CONTROL............................................................................................................................ 40 19.3 VOLTAGE REGULATOR CONTROL.......................................................................................................40 19.4 ACTIVE MODES ..................................................................................................................................41 19.5 WAKE ON RADIO (WOR)...................................................................................................................41 19.6 TIMING ...............................................................................................................................................42 19.7 RX TERMINATION TIMER ...................................................................................................................43 20 DATA FIFO ........................................................................................................................................43 21 FREQUENCY PROGRAMMING ..............................................................................................................44 22 VCO...................................................................................................................................................45 22.1 VCO AND PLL SELF-CALIBRATION ...................................................................................................45 23 VOLTAGE REGULATORS .....................................................................................................................46 24 OUTPUT POWER PROGRAMMING ........................................................................................................46 25 SELECTIVITY ......................................................................................................................................48 26 CRYSTAL OSCILLATOR .......................................................................................................................50 26.1 REFERENCE SIGNAL ........................................................................................................................... 50 27 EXTERNAL RF MATCH .......................................................................................................................50 28 PCB LAYOUT RECOMMENDATIONS....................................................................................................51 29 GENERAL PURPOSE / TEST OUTPUT CONTROL PINS ...........................................................................52 30 ASYNCHRONOUS AND SYNCHRONOUS SERIAL OPERATION ................................................................ 54 30.1 ASYNCHRONOUS OPERATION .............................................................................................................54 30.2 SYNCHRONOUS SERIAL OPERATION ...................................................................................................54 31 SYSTEM CONSIDERATIONS AND GUIDELINES .....................................................................................54 31.1 SRD REGULATIONS............................................................................................................................ 54 31.2 FREQUENCY HOPPING AND MULTI-CHANNEL SYSTEMS.....................................................................55 31.3 WIDEBAND MODULATION NOT USING SPREAD SPECTRUM ................................................................ 55 31.4 DATA BURST TRANSMISSIONS............................................................................................................55 31.5 CONTINUOUS TRANSMISSIONS ...........................................................................................................55 31.6 CRYSTAL DRIFT COMPENSATION .......................................................................................................56 31.7 SPECTRUM EFFICIENT MODULATION..................................................................................................56 31.8 LOW COST SYSTEMS .......................................................................................................................... 56 31.9 BATTERY OPERATED SYSTEMS ..........................................................................................................56 31.10 INCREASING OUTPUT POWER .........................................................................................................56 32 CONFIGURATION REGISTERS ..............................................................................................................57 32.1 CONFIGURATION REGISTER DETAILS – REGISTERS WITH PRESERVED VALUES IN SLEEP STATE ......61 32.2 CONFIGURATION REGISTER DETAILS – REGISTERS THAT LOSE PROGRAMMING IN SLEEP STATE.....80 32.3 STATUS REGISTER DETAILS................................................................................................................81 33 PACKAGE DESCRIPTION (QFN 20) .....................................................................................................85 33.1 RECOMMENDED PCB LAYOUT FOR PACKAGE (QFN 20)....................................................................85 33.2 SOLDERING INFORMATION .................................................................................................................85 34 ORDERING INFORMATION...................................................................................................................86 35 REFERENCES.......................................................................................................................................86 36 GENERAL INFORMATION ....................................................................................................................88 36.1 DOCUMENT HISTORY ......................................................................................................................... 88 |
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