Data Sheet

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LJ1269HC

Rev1.0 Page 1 Web: www.ljelect.com

TAL

 +20 dBm - 100 mW Power Output Capability

 High Sensitivity: down to -120 dBm at 1.2 kbps

 High Selectivity: 16-tap FIR Channel Filter

 Bullet-proof front end: IIP3 = -18 dBm, IIP2 = +35 dBm,80 dB

Blocking Immunity, no Image Frequency response

 Low current: Rx = 16 mA, 100nA register retention

 Programmable Pout: -18 to +20 dBm in 1dB steps

 Constant RF performance over voltage range of Module

 FSK Bit rates up to 300 kb/s

 Fully integrated synthesizer with a resolution of 61 Hz

 FSK, GFSK, MSK, GMSK and OOK modulations

 Built-in Bit Synchronizer performing Clock Recovery

 Incoming Sync W ord Recognition

 115 dB+ Dynamic Range RSSI

 Automatic RF Sense with ultra-fast AFC

 Packet engine with CRC-16, AES-128, 66-byte FIFO Built-in

temperature sensor

 ModuleSize:16X16mm

KEY PRODUCT FEATURES

The LJ1269HC is a transceiver Modulecapable of operation over a wide

frequency range, including the 315,433,868 and 915MHz license-free ISM

(Industry Scientific and Medical) frequency bands. All major RF

communication param eters are programmable and m ost of them can be

dynam ically set. The LJ1269HC offers the unique advantage of programm

able narrow-band and wide- band communication modes. The LJ1269HC is

optim ized for low power consumption while offering high RF output power and

channelized operation. Com pliance ETSI and FCC regulations.

In order to better use LJ1269HC modules, this specification also involves a

large num ber of the param eters and functions of its core chip

RF69H's,including those IC pins which are not leaded out. All of these can

help customers gain a better understanding of the performance of LJ1269HC

modules, and enhance the application skills.

GENERAL DESCRIPTION

Sub GHz FSK/OOK Transceiver Module DATASHEET

 Autom

ated

Meter Reading

 W ireless Sensor Networks

 Hom e and Building Automation

 Wireless Alarm and Security

Systems

 Industrial Monitoring and Control

 Wireless M-BUS

APPLICATIONS

Summary of content (85 pages)

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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET TAL ND GENERAL DESCRIPTION The LJ1269HC is a transceiver Modulecapable of operation over a wide frequency range, including the 315,433,868 and 915MHz license-free ISM (Industry Scientific and Medical) frequency bands. All major RF communication param eters are programmable and m ost of them can be dynam ically set. The LJ1269HC offers the unique advantage of programm able narrow-band and wide- band communication modes.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Table of Contentents Page 1. General Description...................................................................................................................................................................................... 8 1.1 Simplified Block Diagram ...................................................................................................................................................................... 8 1.2 Pin Diagram .......
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 3.4.11. OOK Demodulator ..................................................................................................................................................................... 28 3.4.12. Bit Synchronizer ......................................................................................................................................................................... 30 3.4.13. Frequency Error Indicator ...............................
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 5.5.5. AES ................................................................................................................................................................................................ 53 5.5.6. Handling Large Packets ............................................................................................................................................................... 54 5.5.7. Packet Filtering ................................
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Figure 14. Optimized AFC (AfcLowBetaOn=1) ........................................................................................................................................... 32 Figure 15. Temperature Sensor Response .................................................................................................................................................... 33 Figure 16. Tx Startup, FSK and OOK .............................................
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Table 11 High Power Settings ........................................................................................................................................................................ 21 Table 12 LNA Gain Settings .......................................................................................................................................................................... 22 Table 13 Receiver Performance Summary ................
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Acronyms BOM Bill Of Materials LSB Least Significant Bit BR Bit Rate MSB Most Significant Bit BW Bandwidth NRZ Non Return to Zero ComitéConsultatif International OOK On Off Keying PA Power Amplifier CCITT Téléphonique et Télégraphique – ITU Rev1.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET This product datasheet contains a detailed description of the LJ1269HC performance and functionality 1. General Description The LJ1269HC is a transceiver Moduleideally suited for today's high performance ISM band RF applications.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 1.2 Pin Diagram The following diagram shows the pin arrangement of the top view. Figure 2. Marking Diagram 1.3 Pin Description Table 1 LJ1269HC Pinouts Rev1.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 2. Electrical Characteristics 2.1 Absolute Maximum Ratings Stresses above the values listed below may cause permanent device failure. Exposure to absolute maximum ratings for extended periods may affect device reliability. Table 2 Absolute Maximum Ratings Symbol Description Min Max Unit VDDmr Supply Voltage -0.5 3.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 2.3 ModuleSpecification The tables below give the electrical specifications of the transceiver under the following conditions: Supply voltage VBAT1= VBAT2=VDD=3.3 V, temperature = 25 °C, FRF = 915 MHz, Pout = +20dBm, 2-level FSK modulation without pre-filtering, FDA = 5 kHz, Bit Rate = 4.8 kb/s and terminated in a matched 50 Ohm impedance, unless otherwise specified.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET FSTEP Frequency synthesizer step FSTEP = FXOSC/2 FRC RC Oscillator frequency BRF 19 - 61.0 - Hz After calibration - 62.5 - kHz Bit rate, FSK Programmable 1.2 - 300 kbps BRO Bit rate, OOK Programmable 1.2 - 32.768 kbps FDA Frequency deviation, FSK Programmable 0.6 - 300 kHz FDA + BRF/2 =< 500 kHz 2.3.3.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module IIP3 DATASHEET 3rd order Input Intercept point Lowest LNA gain - +20 - dBm Unwanted tones are 1MHz and Highest LNA gain -23 -18 - dBm 1.995 MHz above the LO BW _SSB Single Side channel filter BW Programmable 2.6 - 500 kHz IMR_OOK Image rejection in OOK mode Wanted signal level = -106 dBm 27 30 - dB TS_RE Receiver wake-up time, from PLL RxBw = 10 kHz, BR = 4.8 kb/s - 1.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 2.3.5. Digital Specification Conditions: Temp = 25°C, VDD = 3.3V, unless otherwise specified. Table 8 Digital Specification Symbol Description Conditions Min Typ Max Unit VIH Digital input level high 0.8 - - VDD VIL Digital input level low - - 0.2 VDD VOH Digital output level high Imax = 1 mA 0.9 - - VDD VOL Digital output level low Imax = -1 mA - - 0.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 3. ModuleDescription This section describes in depth the architecture of the LJ1269HC low-power, highly integrated transceiver. 3.1 Power Supply Strategy The LJ1269HC employs an advanced power supply scheme, which provides stable operating characteristics over the full temperature and voltage range of operation. This includes the full output power of +20dBm maintained from 2.4 to 3.6V.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 3.2.2. CLKOUT Output The reference frequency, or a fraction of it, can be provided on DIO5 by modifying bits ClkOut in RegDioMapping2. Two typical applications of the CLKOUT output include: To provide a clock output for a companion processor, thus saving the cost of an additional oscillator. CLKOUT can be made available in any operation mode except Sleep mode and is automatically enabled at power on reset. ‹ To provide an oscillator reference output.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module 3.2.4. DATASHEET Lock Time PLL lock time TS_FS is a function of a number of technical factors, such as synthesized frequency, frequency step, etc. W hen using the built-in sequencer, the LJ1269HC optimizes the startup time and automatically starts the receiver or the transmitter when the PLL has locked.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 3.3. Transmitter Description The transmitter of LJ1269HC comprises the frequency synthesizer, modulator and power amplifier blocks. 3.3.1. Architecture Description Figure 4. Transmitter Block Diagram 3.3.2.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Table 9 Bit Rate Examples Type BitRate BitRate (G)FSK OOK Actual BR (b/s) (15:8) (7:0) (G)MSK Classical modem baud 0x68 0x2B 1.2 kbps 1.2 kbps 1200.015 rates(multiples of 1.2 0x34 0x15 2.4 kbps 2.4 kbps 2400.060 kbps) 0x1A 0x0B 4.8 kbps 4.8 kbps 4799.760 0x0D 0x05 9.6 kbps 9.6 kbps 9600.960 0x06 0x83 19.2 kbps 19.2 kbps 19196.16 0x03 0x41 38.4 kbps 38415.36 0x01 0xA1 76.8 kbps 76738.60 0x00 0xD0 153.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 3.3.5. Modulation Shaping Modulation shaping can be applied in both OOK and FSK modulation modes, to improve the narrowband response of the transmitter. Both shaping features are controlled with PaRamp bits in RegPaRamp. In FSK mode, a Gaussian filter with BT = 0.3, 0.5 or 1 is used to filter the modulation stream, at the input of the sigma-delta modulator.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 3.3.7.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 3.4 Receiver Description The LJ1269HC features a digital receiver with the analog to digital conversion process being performed directly following the LNA-Mixers block. The zero-IF receiver is able to handle (G)FSK and (G)MSK modulation. ASK and OOK modulation is, however, demodulated by a low-IF architecture.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 3.4.2 Automatic Gain Control By default (LnaGainSelect = 000), the LNA gain is controlled by a digital AGC loop in order to obtain the optimal sensitivity/ linearity trade-off. Regardless of the data transfer mode (Packet or Continuous), the following series of events takes place when the receiver is enabled:  The receiver stays in WAIT mode, until RssiValue exceeds RssiThreshold for two consecutive samples.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Table 13 Receiver Performance Summary Input Power Gain Receiver Performance (typ) Pin Setting P-1dB [dBm] NF [dB] IIP3 [dBm] IIP2 [dBm] Pin < AgcThresh1 G1 -37 7 -18 +35 AgcThresh1 < Pin < AgcThresh2 G2 -31 13 -15 +40 AgcThresh2 < Pin < AgcThresh3 G3 -26 18 -8 +48 AgcThresh4 < Pin < AgcThresh5 G4 -14 27 -1 +62 AgcThresh5 < Pin G5 >-6 36 +13 +68 AgcThresh5 < Pin G6 >0 44 +20 +75 RssiThreshold Setting For corr
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 3.4.4. Quadrature Mixer - ADCs – Decimators The mixer is inserted between output of the RF buffer stage and the input of the analog to digital converter (ADC) of the receiver section. This block is designed to translate the spectrum of the input RF signal to base-band, and offer both high IIP2 and IIP3 responses.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 01b / 20 4 25.0 12.5 00b / 16 4 31.3 15.6 10b / 24 3 41.7 20.8 01b / 20 3 50.0 25.0 00b / 16 3 62.5 31.3 10b / 24 2 83.3 41.7 01b / 20 2 100.0 50.0 00b / 16 2 125.0 62.5 10b / 24 1 166.7 83.3 01b / 20 1 200.0 100.0 00b / 16 1 250.0 125.0 10b / 24 0 333.3 166.7 01b / 20 0 400.0 200.0 00b / 16 0 500.0 250.0 3.4.6.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Note: this filter is automatically bypassed when receiving FSK signals (ModulationType = 00 in RegDataModul). 3.4.8. RSSI The RSSI block evaluates the amount of energy available within the receiver channel bandwidth. Its resolution is 0.5 dB, and it has a wide dynamic range to accommodate both small and large signal levels that may be present. Its acquisition time is very short, taking only 2 bit periods.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Figure 9. Cordic Extraction 3.4.10. FSK Demodulator The FSK demodulator of the LJ1269HC is designed to demodulate FSK, GFSK, MSK and GMSK modulated signals. It is most efficient when the modulation index of the signal is greater than 0.5 and below 10: 0.5≤β= 2×𝐹𝐷𝐸𝑉 𝐵𝑅 ≤10 The output of the FSK demodulator can be fed to the Bit Synchronizer (described in section 3.4.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET The default settings of the OOK demodulator lead to the performance stated in the electrical specification. However, in applications in which sudden signal drops are awaited during a reception, the three parameters should be optimized accordingly. Optimizing the Floor Threshold OokFixedThresh determines the sensitivity of the OOK receiver, as it sets the comparison threshold for weak input signals (i.e. those close to the noise floor).
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 3.4.12. Bit Synchronizer The Bit Synchronizer is a block that provides a clean and synchronized digital output, free of glitches. Its output is made available on pin DIO1/DCLK in Continuous mode and can be disabled through register settings. However, for optimum receiver performance its use when running Continuous mode is strongly advised. The Bit Synchronizer is automatically activated in Packet mode.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET signed result is loaded in FeiValue in RegFei, in 2‟s complement format. The time required for an FEI evaluation is 4 times the bit period.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 3.4.14. Automatic Frequency Correction The AFC is based on the FEI block, and therefore the same input signal and receiver setting conditions apply. W hen the AFC procedure is done, AfcValue is directly subtracted to the register that defines the frequency of operation of the module, F RF.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET As shown on Figure 15, a standard AFC sequence uses the result of the FEI to correct the LO frequency and align both local oscillators. W hen the optimized AFC is enabled (AfcLowBetaOn=1), the receiver‟s LO is corrected by “FeiValue + LowBetaAfcOffset”. When the optimized AFC routine is enabled, the receiver startup time can be computed as follows (refer to section 4.2.3): TS_RE_AGC&AFC (optimized AFC) = Tana + 4.Tcf + 4.Tdcc + 3.Trssi + 2.Tafc + 2.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 4. Operating Modes 4.1. Basic Modes The circuit can be set in 5 different basic modes which are described in Table 16. By default, when switching from a mode to another one, the sub-blocks are woken up according to a pre-defined and optimized sequence. Alternatively, these operating modes can be selected directly by disabling the automatic sequencer (SequencerOff in RegOpMode = 1).
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 4.2.1. Transmitter Startup Time The transmitter wake-up time, TS_TR, is given by the sequence controlled by the digital part. It is a pure digital delay which depends on the bit rate and the ramp-up time. In FSK mode, this time can be derived from the following equation. 1 TS_TR=5μS+1.25×PaRamp+ ×Tbit 2 where PaRamp is the ramp-up time programmed in RegPaRamp and Tbit is the bit time.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Figure 17. Rx Startup - No AGC, no AFC Figure 18. Rx Startup - AGC, no AFC Figure 19. Rx Startup - AGC and AFC The different timings shown above are as follows:  Group delay of the analog front end:  Channel filter‟s group delay in FSK mode: Tcf = 21 / (4.RxBw)  Channel filter‟s group delay in OOK mode: Tcf = 34 / (4.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 4.2.4. Rx Start Procedure As described in the former sections, the RxReady interrupt warns the uC that the receiver is ready.  In Continuous mode with Bit Synchronizer, the receiver will start locking its Bit Synchronizer on a minimum or 12 bits of received preamble (see section 3.4.13 for details), before the reception of correct Data, or Sync W ord (if enabled) can occur.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Figure 20. Listen Mode Sequence (no wanted signal is received) 4.3.1. Timings The duration of the Idle phase is given by tListenIdle. The time during which the receiver is on and waits for a signal is given by tListenRx. tListenRx includes the wake-up time of the receiver, described in section 4.2.3. This duration can be programmed in the configuration registers via the serial interface.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 4.3.2. Criteria The criteria taken for detecting a wanted signal and hence deciding to maintain the receiver on is defined by ListenCriteria in RegListen1. Table 18 Signal Acceptance Criteria in Listen Mode ListenCriteria Input Signal SyncAddressMatch Power >=RssiThreshold 0 Required Not Required 1 Required Required 4.3.3.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Figure 21. Listen Mode Sequence (wanted signal is received) 4.3.4.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Some typical examples of AutoModes usage are described below:  Automatic transmission (AutoTx) : Mode = Sleep, IntermediateMode = Tx, EnterCondition = FifoLevel, ExitCondition = PacketSent  Automatic reception (AutoRx) : Mode = Rx, IntermediateMode = Sleep, EnterCondition = CrcOk, ExitCondition = falling edge of FifoNotEmpty  Automatic reception of acknowledge (AutoRxAck): Mode = Tx, IntermediateMode = Rx, EnterCondition = PacketSent, ExitCondi
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LJ1269HC Sub GHz FSK/OOK Transceiver Module  DATASHEET Packet mode (recommended): user only provides/retrieves payload bytes to/from the FIFO. The packet is automatically built with preamble, Sync word, and optional AES, CRC, and DC-free encoding schemes The reverse operation is performed in reception. The uC processing overhead is hence significantly reduced compared to Continuous mode.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET The first byte is the address byte. It is made of:  wnr bit, which is 1 for write access and 0 for read access  7 bits of address, MSB first The second byte is a data byte, either sent on MOSI by the master in case of a write access, or received by the master on MISO in case of read access. The data byte is transmitted MSB first.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module  DATASHEET FifoNotEmpty: FifoNotEmpty interrupt source is low when byte 0, i.e. whole FIFO, is empty. Otherwise it is high. Note that when retrieving data from the FIFO, FifoNotEmpty is updated on NSS falling edge, i.e. when FifoNotEmpty is updated to low state the currently started read operation must be completed.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Table 20 Status of FIFO when Switching Between Different Modes of the Module From To FIFO status Stdby Sleep Not cleared Sleep Stdby Not cleared Stdby/Sleep Tx Not cleared Comments To allow the user to write the FIFO in Stdby/Sleep before Tx Stdby/Sleep Rx Cleared Rx Tx Cleared Rx Stdby/Sleep Not cleared To allow the user to read FIFO in Stdby/Sleep mode after Rx Tx Any Cleared 5.2.3.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Configuration  Size: Sync word size can be set from 1 to 8 bytes (i.e. 8 to 64 bits) via SyncSize in RegSyncConfig. In Packet mode this field is also used for Sync word generation in Tx mode.  Error tolerance: The number of errors tolerated in the Sync word recognition can be set from 0 to 7 bits to via SyncTol.  Value: The Sync word value is configured in SyncValue(63:0).
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Table 22 DIO Mapping, Packet Mode Mode Sleep Stdby FS Rx Tx Note Diox Mapping 00 01 10 11 00 01 10 11 00 01 10 11 00 01 10 11 00 01 10 11 DIO5 ModeReady ClkOut ModeReady ClkOut ModeReady ClkOut Data ModeReady ClkOut Data ModeReady DIO4 PllLock Timeout Rssi RxReady PllLock ModeReady TxReady PllLock DIO3 FifoFull FifoFull FifoFull PllLock FifoFull Rssi SyncAddress PllLock FifoFull TxReady PllLock DIO2 FifoNotEmpty AutoMode FifoNotEmpty AutoMode
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 5.4.2. Tx Processing In Tx mode, a synchronous data clock for an external uC is provided on DIO1/DCLK pin. Clock timing with respect to the data is illustrated in Figure 30. DATA is internally sampled on the rising edge of DCLK so the uC can change logic state anytime outside the grayed out setup/hold zone. Figure 29. Tx Processing in Continuous Mode Note the use of DCLK is required when the modulation shaping is enabled (see section 3.3.5). 5.4.3.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 5.5. Packet Mode 5.5.1. General Description In Packet mode the NRZ data to (from) the (de)modulator is not directly accessed by the uC but stored in the FIFO and accessed via the SPI interface. In addition, the LJ1269HC packet handler performs several packet oriented tasks such as Preamble and Sync word generation, CRC calculation/check, whitening/dewhitening of data, Manchester encoding/decoding, address filtering, AES encryption/decryption, etc.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET The length of the payload is limited to 255 bytes if AES is not enabled else the message is limited to 64 bytes (i.e. max 65 bytes payload if Address byte is enabled). The length programmed in PayloadLength relates only to the payload which includes the message and the optional address byte. In this mode, the payload must contain at least one byte, i.e. address or message byte. An illustration of a fixed length packet is shown below.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Figure 33. Variable Length Packet Format Unlimited Length Packet Format Unlimited length packet format is selected when bit PacketFormat is set to 0 and PayloadLength is set to 0. The user can then transmit and receive packet of arbitrary length and PayloadLength register is not used in Tx/Rx modes for counting the length of the bytes transmitted/received. This mode is a replacement for the legacy buffered mode in RF63/RF64 transceivers.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 5.5.3. Tx Processing (without AES) In Tx mode the packet handler dynamically builds the packet by performing the following operations on the payload available in the FIFO:  Add a programmable number of preamble bytes  Add a programmable Sync word  Optionally calculating CRC over complete payload field (optional length byte + optional address byte + message) andappending the 2 bytes checksum.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET If the address check is enabled then the second byte received in case of variable length and first byte in case of fixed length is the address byte. If the address matches to the one in the NodeAddress field, reception of the data continues otherwise it's stopped. The CRC check is performed if CrcOn = 1 and the result is available in CrcOk indicating that the CRC was successful.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET In Fixed length mode the Message part of the payload that can be encrypted/decrypted can be 64 bytes long. If the address filtering is enabled, the length of the payload should be at max 65 bytes in this case. In Variable length mode the Max message size that can be encrypted/decrypted is also 64 bytes when address filtering is disabled, else it is 48 bytes.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Every received packet which does not start with this locally configured Sync word is automatically discarded and no interrupt is generated. When the Sync word is detected, payload reception automatically starts and SyncAddressMatch is asserted. Note Sync Word values containing 0x00 byte(s) are forbidden Address Based Address filtering can be enabled via the AddressFiltering bits. It adds another level of filtering, above Sync word (i.e.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET By default, if the CRC check fails then the FIFO is automatically cleared and no interrupt is generated. This filtering function can be disabled via CrcAutoClearOff bit and in this case, even if CRC fails, the FIFO is not cleared and only PayloadReady interrupt goes high. Please note that in both cases, the two CRC checksum bytes are stripped off by the packet handler and only the payload is made available in the FIFO.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Manchester encoding/decoding is thus made transparent for the user, who still provides/retrieves NRZ data to/from the FIFO Figure 36. Manchester Encoding/Decoding Data Whitening Another technique called whitening or scrambling is widely used for randomizing the user data before radio transmission. The data is whitened using a random sequence on the Tx side and de-whitened on the Rx side using the same sequence.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 6. Configuration and Status Registers 6.1.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module Address Register Name DATASHEET Reset Default (built-in) (recom Description mended) 0x1A RegAfcBw 0x8A 0x8B 0x1B RegOokPeak 0x40 OOK demodulator selection and control in peak mode 0x1C RegOokAvg 0x80 Average threshold control of the OOK demodulator 0x1D RegOokFix 0x06 Fixed threshold control of the OOK demodulator 0x1E RegAfcFei 0x10 AFC and FEI control and status 0x1F RegAfcMsb 0x00 MSB of the frequency correction of the AFC 0x20
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LJ1269HC Sub GHz FSK/OOK Transceiver Module Address Register Name DATASHEET Reset Default (built-in) (recom Description mended) Note 0x3E-0x4D RegAesKey1-16 0x00 16 bytes of the cypher key 0x4E RegTemp1 0x01 Temperature Sensor control 0x4F RegTemp2 0x00 Temperature readout 0x58 RegTestLna 0x1B Sensitivity boost 0x5A RegTestPa1 0x55 High Power PA settings 0x5C RegTestPa2 0x70 High Power PA settings 0x6F RegTestDagc 0x71 RegTestAfc 0x50 + RegTest 0x00 0x30 0x00 Fadi
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 6.2. Common Configuration Registers Table 24 Common Configuration Registers Name (Address) RegFifo (0x00) RegOpMode (0x01) RegDataMod ul (0x02) RegBitrateMs b (0x03) Rev1.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module RegBitrateLsb 7-0 BitRate(7:0) rw DATASHEET 0x0b (0x04) LSB of Bit Rate (Chip Rate if Manchester encoding is enabled) BitRate= FXO SC BitRate (15,0) Default value: 4.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module RegListen1 (0x0D) 7-6 ListenResolIdle rw DATASHEET 10 Resolution of Listen mode Idle time (calibrated RC osc): 00 → reserved 01 → 64 us 10 → 4.1 ms 11 → 262 ms 5-4 ListenResolRx rw 01 Resolution of Listen mode Rx time (calibrated RC osc): 00 → reserved 01 → 64 us 10 → 4.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 6.3.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 6.4.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module RegOokPeak (0x1B) DATASHEET 7-6 OokThreshType rw 01 5-3 OokPeakTheshStep rw 000 2-0 OokPeakThreshDec rw 000 7-6 OokAverageThreshFilt rw 10 5-0 - r 000000 Selects type of threshold in the OOK data slicer: 00 → fixed 10 → average 01 → peak 11 → reserved Size of each decrement of the RSSI threshold in the OOK demodulator: 000 → 0.5 dB 001 → 1.0 dB 010 → 1.5 dB 011 → 2.0 dB 100 → 3.0 dB 101 → 4.0 dB 110 → 5.0 dB 111 → 6.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 6.5.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module RegIrqFlags2 7 FifoFull DATASHEET r 0 (0x28) Set when FIFO is full (i.e. contains 66 bytes), else cleared. 6 FifoNotEmpty r 0 Set when FIFO contains at least one byte, else cleared 5 FifoLevel r 0 Set when the number of bytes in the FIFO strictly exceeds FifoThreshold, else cleared. 4 FifoOverrun rwc 0 Set when FIFO overrun occurs. (except in Sleep mode) Flag(s) and FIFO are cleared when this bit is set.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 6.6. Packet Engine Registers Table 28 Packet Engine Registers Name (Address) Bits Variable Name Mode Default Description Value RegPreambleMsb 7-0 PreambleSize(15:8) rw 0x00 (0x2c) RegPreambleLsb TxStartCondition fulfilled). (MSB byte) 7-0 PreambleSize(7:0) rw 0x03 (0x2d) RegSyncConfig Size of the preamble to be sent (from Size of the preamble to be sent (from TxStartCondition fulfilled).
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LJ1269HC Sub GHz FSK/OOK Transceiver Module RegPacketConfig1 (0x37) DATASHEET 7 PacketFormat rw 0 6-5 DcFree rw 00 4 CrcOn rw 1 3 CrcAutoClearOff rw 0 2-1 AddressFiltering rw 00 0 - rw 0 RegPayloadLength (0x38) 7-0 PayloadLength rw 0x40 If PacketFormat = 0 (fixed), payload length. If PacketFormat = 1 (variable), max length in Rx, not used in Tx. RegNodeAdrs (0x39) 7-0 NodeAddress rw 0x00 Node address used in address filtering.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module RegFifoThresh (0x3C) DATASHEET 7 TxStartCondition rw 1 * 6-0 FifoThreshold rw 000111 7-4 InterPacketRxDelay rw 0000 3 - rw 0 2 RestartRx w 0 1 AutoRxRestartOn rw 1 0 AesOn rw 0 RegAesKey1 (0x3E) 7-0 AesKey(127:120) w 0x00 Forces the Receiver in WAIT mode, in Continuous Rx mode. Always reads 0. Enables automatic Rx restart (RSSI phase) after PayloadReady occurred and packet has been completely read from FIFO: 0 → Off.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET RegAesKey14 (0x4B) 7-0 AesKey(23:16) w 0x00 14th byte of cipher key RegAesKey15 7-0 AesKey(15:8) w 0x00 15th byte of cipher key 7-0 AesKey(7:0) w 0x00 16th byte of cipher key (LSB byte) (0x4C) RegAesKey16 (0x4D) 6.7.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 7. Application Information 7.1. Crystal Resonator Specification Table 31 shows the crystal resonator specification for the crystal reference oscillator circuit of the LJ1269HC . This specification covers the full range of operation of the LJ1269HC and is employed in the reference design. Table 31 Crystal Specification Symbol Description FXOSC XTAL Conditions Min Typ Max Unit 26 - 32 MHz - 30 140 ohms - 2.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 7.2.2. Manual Reset A manual reset of the LJ1269HC is possible even for applications in which VDD cannot be physically disconnected. Pin RESET should be pulled high for a hundred microseconds, and then released. The user should then wait for 5 ms before using the module. Figure 39. Manual Reset Timing Diagram Note whilst pin RESET is driven high, an over current consumption of up to ten milliamps can be seen on VDD. Rev1.0 Page 74 Web: www.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 7.3. Reference Design Please contact your representative for evaluation tools, reference designs and design assistance. Note that all schematics shown in this section are full schematics, listing ALL required components, including decoupling capacitors. Rev1.0 Page 75 Web: www.ljelect.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Table 32. BOM of Typical Application Designator Descriptions Manufacturer M1 ModuleLJ1269HC 16*16*2.2mm RoHS LJ ELECTRONICS U1 IC 8 BIT MCU STM8S003F3 SSOP20 RoHS MICROICHIP U2 IC LDO XC6206P33PR 3.3V SOT-23 RoHS TOREX L1 5% 1/16W 0402 RoHS C1 CAP CER 0402 DO NOT FIT C2 CAP CER 0402 DO NOT FIT C3 C4 C5 C6 C7 C8 Rev1.0 Thick film resistor0R CAP CER 0.1uF/25V 20% X7R 0402 RoHS CAP CER 0.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 8. Packaging Information 8.1. Package Outline Drawing Unit: mm Rev1.0 Page 77 Web: www.ljelect.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 8.2. Tray packaging Figure 41. Package Outline Drawing Note: tray packaging, 60pcs/tray. Rev1.0 Page 78 Web: www.ljelect.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 9. Recommended PCB Land Pattern Unit: mm Rev1.0 Page 79 Web: www.ljelect.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 10. Ordering Information LJ1269HC — 433 — X Package Blank: tray packaging R: Reel Packaging Operation Band 315MHz 433MHz 868MHz 915MHz Model 11. Revision History Table 33 Revision History Rev1.0 Revision Date Updated History Rev1.0 March 2014 The first final release Page 80 Web: www.ljelect.
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LJ1269H Sub GHz FSK/OOK Tranceiver Module DATASHEET Appendix This document covers the Regulatory Compliance information and related documents shared with customers. 1.1 Antenna Considerations:The list of Approved antennas: Dedicated Antenna, the use of a standard antenna jack or electrical connector is prohibited, and Antenna Gain less than 1.2dBi. 1.2 Usage Instructions under Limited Modular Approval When used in USA, will only work on the 902-928 MHz Frequency band.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET Requirement per KDB996369 D03 2.2 List of applicable FCC rules List the FCC rules that are applicable to the modular transmitter. These are the rules that specifically establish the bands of operation, the power, spurious emissions, and operating fundamental frequencies. DO NOT list compliance to unintentional-radiator rules (Part 15 Subpart B) since that is not a condition of a module grant that is extended to a host manufacturer.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 2.5 Trace antenna designs For a modular transmitter with trace antenna designs, see the guidance in Question 11 of KDB Publication 996369 D02 FAQ – Modules for Micro-Strip Antennas and traces. The integration information shall include for the TCB review the integration instructions for the following aspects: layout of trace design, parts list (BOM), antenna, connectors, and isolation requirements. a) Information that includes permitted variances (e.g.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 2.7 Antennas A list of antennas included in the application for certification must be provided in the instructions. For modular transmitters approved as limited modules, all applicable professional installer instructions must be included as part of the information to the host product manufacturer. The antenna list shall also identify the antenna types (monopole, PIFA, dipole, etc.
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LJ1269HC Sub GHz FSK/OOK Transceiver Module DATASHEET 2.10 Additional testing, Part 15 Subpart B disclaimer The grantee should include a statement that the modular transmitter is only FCC authorized for the specific rule parts (i.e., FCC transmitter rules) listed on the grant, and that the host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification.