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CC1101The GDO0 pin can also be used for an on-chipanalog temperature sensor. By measuring thevoltage on the GDO0 pin with an externalADC, the temperature can be calculated.Specifications for the temperature sensor arefound in Section 4.7 on page 15.With default PTEST register setting (0x7F) thetemperature sensor output is only availablewhen the frequency synthesizer is enabled(e.g. the MANCAL, FSTXON, RX, and TXstates). It is necessary to write 0xBF to thePTEST register to use the analog temperaturesensor in the IDLE state. Before leaving theIDLE state, the PTEST register should berestored to its default value (0x7F).11.3 Optional Radio Control FeatureThe CC1101 has an optional way of controllingthe radio, by reusing SI, SCLK, and CSn fromthe SPI interface. This feature allows for asimple three-pin control of the major states ofthe radio: SLEEP, IDLE, RX, and TX.This optional functionality is enabled with theMCSM0.PIN_CTRL_EN configuration bit.State changes are commanded as follows:When CSn is high the SI and SCLK is set tothe desired state according to Table 18. When12 Data Rate ProgrammingThe data rate used when transmitting, or thedata rate expected in receive is programmedby the MDMCFG3.DRATE_M and theMDMCFG4.DRATE_E configuration registers.The data rate is given by the formula below.As the formula shows, the programmed datarate depends on the crystal frequency.CSn goes low the state of SI and SCLK islatched and a command strobe is generatedinternally according to the pin configuration. Itis only possible to change state with thisfunctionality. That means that for instance RXwill not be restarted if SI and SCLK are set toRX and CSn toggles. When CSn is low the SIand SCLK has normal SPI functionality.All pin control command strobes are executedimmediately, except the SPWD strobe, which isdelayed until CSn goes high.CSn SCLK SI Function1 X X Chip unaffected by SCLK/SI↓ 0 0 Generates SPWD strobe↓ 0 1 Generates STX strobe↓ 1 0 Generates SIDLE strobe↓ 1 1 Generates SRX strobe0SPImodeSPImodeSPI mode (wakes up intoIDLE if in SLEEP/XOFF)Table 18: Optional Pin Control CodingIf DRATE_M is rounded to the nearest integerand becomes 256, increment DRATE_E anduse DRATE_M = 0.The data rate can be set from 1.2 kBaud to500 kBaud with the minimum step size of:R( 256 + DRATE _ M )DATA=282⋅ 2DRATE _ E⋅ fXOSCThe following approach can be used to findsuitable values for a given data rate:⎢ ⎛ RDRATE _ E = ⎢log2⎜⎢⎣⎝ fDRATE _ M =fRDATA⋅ 2⋅ 2XOSC2028DATADRATE _ EXOSC⋅ 2⎞⎥⎟⎥⎠⎥⎦− 256SWRS061C Page 28 of 94
CC1101Min DataRate[kBaud]Typical DataRate[kBaud]Max DataRate[kBaud]Data rateStep Size[kBaud]0.8 1.2 / 2.4 3.17 0.00623.17 4.8 6.35 0.01246.35 9.6 12.7 0.024812.7 19.6 25.4 0.049625.4 38.4 50.8 0.0992Min DataRate[kBaud]Typical DataRate[kBaud]Max DataRate[kBaud]Data rateStep Size[kBaud]50.8 76.8 101.6 0.1984101.6 153.6 203.1 0.3967203.1 250 406.3 0.7935406.3 500 500 1.5869Table 19: Data Rate Step SizeSWRS061C Page 29 of 94
Page 1 and 2: 6789CC1101CC1101Low-Cost Low-Power
Page 3 and 4: CC1101AbbreviationsAbbreviations us
Page 5 and 6: CC110115.3 PACKET FILTERING IN RECE
Page 7 and 8: CC11011 Absolute Maximum RatingsUnd
Page 9 and 10: CC1101Parameter Min Typ Max Unit Co
Page 15 and 16: CC11014.7 Analog Temperature Sensor
Page 17 and 18: CC1101Pin # Pin Name Pin type Descr
Page 19 and 20: CC1101Table 14: Overview of Externa
Page 22 and 23: CC1101Default state when the radio
Page 24 and 25: CC1101transfer the header byte. Thi
Page 26 and 27: CC1101incremented by one each new b
Page 30 and 31: CC110113 Receiver Channel Filter Ba
Page 32 and 33: CC110115.1 Data WhiteningFrom a rad
Page 34 and 35: CC1101• Transmit at least 345 byt
Page 36 and 37: CC1101MISO line each time a header
Page 38 and 39: CC1101Data rate [kBaud] RSSI_offset
Page 40 and 41: CC1101MAX_DVGA_GAIN value. This wil
Page 42 and 43: CC110119 Radio ControlSIDLECAL_COMP
Page 44 and 45: CC110119.3 Voltage Regulator Contro
Page 46 and 47: CC1101DescriptionXOSCPeriods26 MHzC
Page 48 and 49: CC110121 Frequency ProgrammingThe f
Page 50 and 51: CC1101OutputPower[dBm]Setting315 MH
Page 52 and 53: CC110126 SelectivityFigure 24 to Fi
Page 54 and 55: CC1101Component C L = 10 pF C L = 1
Page 56 and 57: CC1101GDOx_CFG[5:0] Description0 (0
Page 58 and 59: CC110132.2 Frequency Hopping and Mu
Page 60 and 61: CC110133 Configuration RegistersThe
Page 62 and 63: CC1101Address Register Description
Page 64 and 65: CC1101Table 37: SPI Address Space33
Page 66 and 67: CC11010x06: PKTLEN - Packet LengthB
Page 68 and 69: CC11010x0B: FSCTRL1 - Frequency Syn
Page 70 and 71: CC11010x12: MDMCFG2 - Modem Configu
Page 72 and 73: CC11010x15: DEVIATN - Modem Deviati
Page 74 and 75: CC11010x17: MCSM1- Main Radio Contr
Page 76 and 77: CC11010x19: FOCCFG - Frequency Offs
Page 78 and 79:
CC11010x1B: AGCCTRL2 - AGC ControlB
Page 80 and 81:
CC11010x1D: AGCCTRL0 - AGC ControlB
Page 82 and 83:
CC11010x21: FREND1 - Front End RX C
Page 84 and 85:
CC110133.2 Configuration Register D
Page 86 and 87:
CC11010x35 (0xF5): MARCSTATE - Main
Page 88 and 89:
CC11010x3D (0xFC): RCCTRL0_STATUS -
Page 90 and 91:
CC110134.5 Carrier Tape and Reel Sp
Page 92 and 93:
CC110137 General Information37.1 Do
Page 94 and 95:
CC1101AsiaPhone International +886-
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