RFM22B-868-S1 QUASAR, RFM22B-868-S1 Datasheet
RFM22B-868-S1
Specifications of RFM22B-868-S1
Related parts for RFM22B-868-S1
RFM22B-868-S1 Summary of contents
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... MCUs. An integrated temperature sensor, general purpose ADC, power- on-reset (POR), and GPIOs further reduce overall system cost and size. The RFM22B/23B’s digital receive archit ecture features a high-performance ADC and DSP based modem which performs demodulation, filtering, and packet handling for increased flexibility and performance. The direct digital transmit ...
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... Invalid Preamble Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 6.9. Synchronization Word Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 6.10. Receive Header Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 6.11. TX Retransmission and Auto Modem Configuration 7.1. Modem Settings for FSK and GFSK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 8. Auxiliary Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 8.1. Smart Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Tel: +86-755-82973805 Fax: +86-755-82973550 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-mail: sales@hoperf.com RFM22B/23B Page . . . . . . . . . . . . . . . . . . . . . . . . . . 42 http://www.hoperf.com 2 ...
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... Wake-Up Timer and 32 kHz Clock Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 8.7. Low Duty Cycle Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 8.8. GPIO Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 8.9. Antenna Diversity 8.10. RSSI and Clear Channel Assessment 9. Reference Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58 10. Register Table and Descriptions 11. Pin Descriptions: RFM22B/23B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61 12. Mechanical Dimension:RFM22B/23B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66 13. Ordering Information .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70 Tel: +86-755-82973805 Fax: +86-755-82973550 . ...
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... Crystal Oscillator and all other blocks OFF Crystal Oscillator and Main Digital Regulator ON, all other blocks OFF. Crystal Oscillator buffer disabled Synthesizer and regulators enabled txpow[2:0] = 111 (+20 dBm) txpow[2:0] = 110 (+13 dBm) txpow[2:0] = 001 (+1 dBm) E-mail: sales@hoperf.com RFM22B/23B Min Typ Max Units 1.8 3.0 3.6 V — ...
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... RFM22B/23B Table 2. Synthesizer AC Electrical Characteristics Parameter Symbol Synthesizer Frequency F Range—RFM22B/ 23B Synthesizer Frequency F RES-LB Resolution F RES-HB Reference Frequency f REF_LV Input Level t Synthesizer Settling Time LOCK ΔF Residual FM RMS Phase Noise Lφ(f Tel: +86-755-82973805 Fax: +86-755-82973550 5 Conditions 433MHz band 470MHz band ...
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... BT = 0.5, channel spacing = 150 kHz Desired Ref Signal 3 dB above sensitivity. Interferer and desired modulated with 40 kbps Δ kHz GFSK with BT = 0.5 Rejection at the image frequency. IF=937 kHz Measured at RX pins E-mail: sales@hoperf.com RFM22B/23B Min Typ Max Units 413 453 MHz ...
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... Parameter Symbol TX Frequency Range—RFM22B/23B FSK Data Rate DR OOK Data Rate DR Modulation Deviation Modulation Deviation Δf Resolution Output Power Range—RFM22B Output Power Range—RFM23B Δ Output Steps RF_OUT Δ Output Level RF_TEMP Variation vs. Temperature Δ Output Level RF_FREQ Variation vs. Frequency ...
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... Configurable to 30 MHz MHz, 10 MHz, 4 MHz, 3 MHz, 2 MHz, 1 MHz, or 32.768 kHz ENB RES CT t 30M RES t 32k RES RES t POR t soft E-mail: sales@hoperf.com RFM22B/23B Min Typ Max Units — 0.5 — °C — 5 — mV/°C — 50 — mV — 250 — µs 32.768K — ...
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Table 6. Digital IO Specifications (SDO, SDI, SCLK, nSEL, and nIRQ) Parameter Rise Time Fall Time Input Capacitance Logic High Level Input Voltage Logic Low Level Input Voltage Input Current ...
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... Power Amplifier may be damaged if switched on without proper load or termination connected. TX matching network design will influence TX V Tel: +86-755-82973805 Fax: +86-755-82973550 Parameter on TX output pin. Caution: ESD sensitive device. RF-peak E-mail: sales@hoperf.com RFM22B/23B Value Unit –0.3, +3.6 –0.3, +8.0 –0.3, +6.5 –0. 0.3 DD – ...
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... The transmit FSK data is modulated directly into the ΔΣ data stream and can be shaped by a Gaussian low-pass filter to reduce unwanted spectral content. The RFM22B’s PA output power can be configured between +1 and +20 dBm steps, while the RFM23B's PA output power can be configured between –8 and +13 dBm in ...
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100p Figure 1. RFM23B Application Example Tel: +86-755-82973805 Fax: +86-755-82973550 ...
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... Operating Modes The RFM22B/23B provides several operating modes which can be used to optimize the power consumption for a given application. Depending upon the system communication protocol, an optimal trade-off between the radio wake time and power consumption can be achieved. Table 9 summarizes the operating modes of the RFM22B/23B. In general, any given operating mode may be classified as an active mode or a power saving mode ...
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... Select high period SW To read back data from the RFM22B/23B, the R/W bit must be set to 0 followed by the 7-bit address of the register from which to read. The 8 bit DATA field following the 7-bit ADDR field is ignored on the SDI pin when R The next eight negative edge transitions of the SCLK signal will clock out the contents of the selected register. The data read from the selected register will be available on the SDO output pin ...
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... SPI address. When the nSEL bit is held low while continuing to send SCLK pulses, the SPI interface will automatically increment the ADDR and read from/write to the next address. An example burst write transaction is illustrated in Figure 5 and a burst read in Figure 6. As long as nSEL is held low, input data will be latched into the RFM22B/23B every eight SCLK cycles. First Bit RW ...
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... 3.2. Operating Mode Control There are four primary states in the RFM22B/23B Figure 7). The SHUTDOWN state completely shuts down the radio to minimize current consumption. There are five different configurations/options for the IDLE state which can be selected to optimize the chip to the applications needs. "Register 07h. Operating Mode and Function Control 1" controls which operating mode/state is selected with the exception of SHUTDOWN which is controlled by SDN pin 20. The TX and RX state may be reached automatically from any of the IDLE states by setting the txon/rxon bits in " ...
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... Tel: +86-755-82973805 Fax: +86-755-82973550 is entered by setting enwt = Control 1". See "8.4. information on these features. E-mail: sales@hoperf.com RFM22B/23B high. The SDN pin 1 (40h) in "Register 07h. Temperature Sensor" and "8. interrupt has Low 17 ...
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3.2.3. TX State The TX state may be entered from any of the IDLE modes when the txon bit is set "Register 07h. Operating Mode and Function ...
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... Interrupts The RFM22B/23B is capable of generating an interrupt signal when certain events occur. The chip notifies the microcontroller that an interrupt event has occurred by setting the nIRQ output pin LOW = 0. This interrupt signal will be generated when any one (or more) of the interrupt events (corresponding to the Interrupt Status bits) shown below occur. The nIRQ pin will remain low until the microcontroller reads the Interrupt Status Register(s) (Registers 03h– ...
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3.4. System Timing The system timing for TX and RX modes is shown in Figures 8 and 9. The figures demonstrate transitioning from STANDBY mode mode ...
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... The following information can be used to calculated these values manually. 3.5.1. Frequency Programming In order to receive or transmit an RF signal, the desired channel frequency, f RFM22B/23B. The carrier frequency is generated by a reference frequency and ...
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fb[4:0] Value The chip will automatically ...
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... Easy Frequency Programming for FHSS While Registers 73h–77h may be used to program the carrier frequency of the RFM22B/23B often easier to think in terms of “channels” or “channel numbers” rather than an absolute frequency value in Hz. Also, there may be some timing-critical applications (such as for Frequency Hopping Systems) in which it is desirable to change frequency by programming a single register. Once the channel step size is set, the frequency may be changed by a single register corresponding to the channel number. A nominal frequency is first set using Registers 73h– ...
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The previous equation should be frequency modulation may also be disabled in order to obtain an unmodulated carrier signal at the channel center frequency; see "4.1. Modulation Type" for further ...
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... PER) versus carrier offset and the impact of AFC are illustrated in Figure 11. Figure 11. Sensitivity at 1% PER vs. Carrier Frequency Offset Tel: +86-755-82973805 Fax: +86-755-82973550 DesiredOffset fo 156.25Hz × (hbsel + fo[7] fo[6] fo[5] fo[4] E-mail: sales@hoperf.com RFM22B/23B POR Def. fo[3] fo[2] fo[1] fo[0] 00h fo[9] fo[8] 00h http://www ...
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When AFC is enabled, the preamble length needs to be long enough to settle the AFC. In general, one byte of preamble is sufficient to settle the AFC. Disabling the ...
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... Tel: +86-755-82973805 Fax: +86-755-82973550 txdr[ 15:0 ] × 1 MHz DR_TX (kbps) = -------------------------------------------------- - × cale × cale DR_TX(kbps) × 2 txdr[15:0] = --------------------------------------------------------------------------------------- - 1 MHz txdr[15] txdr[14] txdr[13] txdr[12] txdr[11] txdr[7] txdr[6] txdr[5] txdr[4] E-mail: sales@hoperf.com RFM22B/23B txdr[10] txdr[9] txdr[8] txdr[3] txdr[2] txdr[1] txdr[0] POR Def. 0Ah 3Dh 27 ...
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... Modulation Options 4.1. Modulation Type The RFM22B/23B supports (GFSK), Frequency Shift Keying (FSK), and On-Off Keying (OOK). GFSK is the recommended modulation type as it provides the best performance and cleanest modulation spectrum. Figure 12 demonstrates the difference between FSK and GFSK for a Data Rate of 64 kbps. The time domain plots demonstrate the effects of the Gaussian filtering. The frequency domain plots demonstrate the spectral benefit of GFSK over FSK. The type of modulation is selected with the modtyp[1:0] bits in " ...
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... Modulation Data Source The RFM22B/23B may be configured to obtain its modulation data from one of three different sources: FIFO mode, Direct Mode, and from a PN9 mode. In Direct Mode, the TX modulation data may be obtained from several different input pins. These options are set through the dtmod[1:0] field in "Register 71h. Modulation Mode Control 2" ...
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4.2.2. Direct Mode For legacy systems that perform packet handling within an MCU or other baseband chip, it may not be desirable to use the FIFO. For this scenario, a ...
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... Direct asynchronous FSK modulation. SCLK SCK Modulation data via GPIO2, no data SDI MOSI clock needed in this mode. SDO MISO μC VDD_DIG GPIO configuration NC GP0 : power-on-reset (default GP1: not utilized GP2 : TX DATA input nRES E-mail: sales@hoperf.com RFM22B/23B http://www.hoperf.com 31 ...
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modulated and transmitted mode it will be the received demodulated data. Figure 15 demonstrates using SDI and SDO as the TX/RX data and clock: nSEL SDI SPI ...
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... A large variety of data rates are supported ranging from 0.123 up to 256 kbps. The AGC algorithm is implemented digitally using an advanced control loop optimized for fast response time. Tel: +86-755-82973805 Fax: +86-755-82973550 ® features optimized for ultra E-mail: sales@hoperf.com RFM22B/23B low power consumption and http://www.hoperf.com 33 ...
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The configurable preamble detector is used to improve the reliability of the sync-word detection. The sync-word detector is only enabled when a valid preamble is detected, significantly reducing the probability ...
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... In certain fast hopping applications this might not be desirable so the VCO calibration may be skipped by setting the appropriate register. 5.7. Power Amplifier The RFM22B contains an internal integrated power amplifier ( PA) capable of transmitting at output levels between –1 and +20 dBm. The RFM23B +13 dBm ...
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... 5.8. Crystal Oscillator The RFM22B/23B includes an integrated 30 MHz crystal oscillator with a fast start-up time of less than 600 Es. A parallel resonant 30MHz crystal is used on the module. The design is differential with the required Crystal load capacitance integrated on-chip to minimize the number of external components. ...
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... When the packet ends, the chip will return to the state specified in register 07h. For example, if 08h is written to address 07h then the chip will return to the STANDBY state. If 09h is written then the chip will return to the READY state. Tel: +86-755-82973805 Fax: +86-755-82973550 TX FIFO Figure 17. FIFO Thresholds E-mail: sales@hoperf.com RFM22B/23B RX FIFO RX FIFO Almost Full Threshold 37 ...
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... The fields needed for packet generation normally change infrequently and can therefore be stored in registers. Automatically adding these fields to the data payload greatly reduces the amount of communication between the microcontroller and the RFM22B/23B and reduces the required computational power of the microcontroller. ...
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... ill be s ent in the firs t tra ns m iss ion ill be s ent in the s ec ond trans ion ill be s ent in the third tra ns m iss ion SYNC RX FIFO Contents: rx_multi_pk_en = 0 Data E-mail: sales@hoperf.com RFM22B/23B DATA rx_multi_pk_en = 1 txhdlen = 0 txhdlen > 0 fixpklen fixpklen Data Data ...
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Initial state Addr ddr. Write 0 0 Pointer 63 63 Figure 22. Multiple Packets in RX with CRC or Header Error Tel: +86-755-82973805 ...
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... E-mail: sales@hoperf.com RFM22B/23B enpactx encrc crc[1] crc[0] pkvalid crcerror pktx pksent hdch[3:0] fixpklen synclen[1] synclen[0] prealen[8] prealen[3] prealen[2] prealen[1] prealen[0] ...
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... Preamble = 0x00 6.6. Preamble Detector The RFM22B/23B has integrated automatic preamble detection. The preamble length is configurable from 1–256 bytes using the prealen[7:0] field in "Register 33h. Header Control 2" and "Register 34h. Preamble Length", as described in “6.2. Packet Configuration”. The preamble detection threshold, preath[4:0] as set in "Register 35h. ...
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... Table 14 demonstrates the recommended preamble detection threshold and preamble length for various modes possible to use RFM22B/23B in a raw mode without the requirement for a 101010 preamble. Contact customer support for further details. Table 14. Minimum Receiver Settling Time ...
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... FFh rxhd[31:24] 6.11. TX Retransmission and Auto TX The RFM22B/23B is capable of automatically retransmitting the last packet loaded in the TX FIFO. Automatic retransmission is set by entering the TX state with the txon bit without reloading the TX FIFO. This feature is useful for beacon transmission or when retransmission is required due to the absence of a valid acknowledgement. Only packets that fit completely in the TX FIFO can be automatically retransmitted ...
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... The modulation index is equal to 2 times the peak deviation divided by the data rate (Rb). When Manchester coding is disabled, the required channel filter bandwidth is calculated 2Fd + Rb where Fd is the frequency deviation and Rb is the data rate. Tel: +86-755-82973805 Fax: +86-755-82973550 RFM22B/23B E-mail: sales@hoperf.com http://www.hoperf.com 45 ...
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... Auxiliary Functions 8.1. Smart Reset The RFM22B/23B contains an enhanced integrated SMART RESET or POR circuit. The POR circuit contains both a classic level threshold reset as well as a slope detector POR. This reset circuit was designed to produce a reliable reset signal under any circumstances. Reset will be initiated if any of the following conditions occur: ...
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... If the microcontroller clock option is being used there may be the need of a system clock for the microcontroller while the RFM22B/23B is in SLEEP mode. Since the crystal oscillator is disabled in SLEEP mode in order to save current, the low-power 32.768 kHz clock can be automatically switched to become the microcontroller clock. This feature is called enable low frequency clock and is enabled by the enlfc bit in “ ...
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8.3. General Purpose ADC An 8-bit SAR ADC is integrated for general purpose use, as well as for digitizing the on-chip temperature sensor reading. Registers 0Fh "ADC Configuration", 10h "Sensor ...
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... Temp. range Unit 0 –64 … 64 °C 1 –64 … 192 ° … 128 °C 1 –40 … 216 ° … 341 °K E-mail: sales@hoperf.com RFM22B/23B 12h. Temperature Sensor tstrim[3] tstrim[2] vbgtrim[1] vbgtrim[0] tvoffs[3] tvoffs[2] tvoffs[1] tvoffs[0] Slope ADC8 LSB 8 mV/°C 0.5 °C 4 mV/° ...
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Temperature Measurement with ADC8 300 250 200 150 100 50 0 -40 -20 Figure 28. Temperature Ranges using ADC8 Tel: +86-755-82973805 Fax: +86-755-82973550 Temperat ure ...
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... D6 D5 lbdt[ vbat[4] vbat[3] vbat[2] vbat[1] vbat[0] BatteryVoltage = 1.7 + 50mV × ADCValue ADC Value VDD Voltage [V] 0 < 1.7 1 1.7–1.75 2 1.75–1.8 … … 29 3.1–3.15 30 3.15–3.2 31 > 3.2 E-mail: sales@hoperf.com RFM22B/23B lbdt[3] lbdt[2] lbdt[1] lbdt[0] POR Def. 14h — 51 ...
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8.6. Wake-Up Timer and 32 kHz Clock Source The chip contains an integrated wake-up timer which can be used to periodically wake the chip from SLEEP mode. The wake-up timer ...
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... SPI Interrupt Read Chip State Current Consumption Figure 29. WUT Interrupt and WUT Operation Tel: +86-755-82973805 Fax: +86-755-82973550 Interrupt Enable enwut = 1 ( Reg 06h) Sleep Ready 1 Interrupt Enable enwut = 0( Reg 06h) Sleep 1 uA E-mail: sales@hoperf.com RFM22B/23B Sleep Ready Sleep 1 http://www.hoperf.com 53 ...
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8.7. Low Duty Cycle Mode The Low Duty Cycle Mode is available to automatically wake-up the receiver to check if a valid signal is available. The basic operation of the ...
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... GPIO 00000—Default Setting GPIO0 POR GPIO1 POR Inverted GPIO2 Microcontroller Clock E-mail: sales@hoperf.com RFM22B/23B itsdo dio2 dio1 dio0 http://www.hoperf.com POR Def. 00h 00h 00h 00h ...
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8.9. Antenna Diversity To mitigate the problem of frequency-selective fading due to multi-path propagation, some transceiver systems use a scheme known as antenna diversity. In this scheme, two antennas are ...
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... Tel: +86-755-82973805 Fax: +86-755-82973550 rssi[7] rssi[6] rssi[5] rssith[7] rssith[6] rssith[5] RSSI vs Input Power -80 -60 -40 In Pow [dBm] Figure 31. RSSI Value vs. Input Power E-mail: sales@hoperf.com RFM22B/23B rssi[4] rssi[3] rssi[2] rssi[1] rssi[0] rssith[4] rssith[3] rssith[2] rssith[1] rssith[0] -20 0 POR Def. — ...
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... Reference Design Figure32A.RFM22B Reference Design Schematic Figure32B.RFM23B Reference Design Schematic Tel: +86-755-82973805 58 Fax: +86-755-82973550 E-mail: sales@hoperf.com ...
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10. Register Table and Descriptions Add R/W Function/Desc 00 R Device Type 01 R Device Version 02 R Device Status 03 R Interrupt Status Interrupt Status 2 ...
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... Reserved Reserved Reserved txafthr[5] Reserved Reserved txaethr[5] Reserve d Reserved rxafthr[5] fifod[7] fifod[6] fifod[5] Fax: +86-755-82973550 E-mail: sales@hoperf.com RFM22B/23B Data pkrx pkvalid crcerror pktx hdch[3:0] hdlen[0] fixpklen synclen[1] synclen[0] prealen[4] prealen[3] prealen[2] prealen[1] preath[1] preath[0] rssi_off[2 ] ...
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... Pin Descriptions: 11.1 Pin Descriptions:RFM22B Tel: +86-755-82973805 61 RFM22B-S1 RFM22B-S2 RFM22B-D Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com ...
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VCC S GND S GPIO_0 I/O GPIO_1 I/O GPIO_2 I/O SDO O SDI I SCLK I nSEL I nIRQ O I SDN I TX_ANT I RX_ANT ANT I/O Tel: +86-755-82 ...
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Pin Descriptions: RFM23B Tel: +86-755-82973805 63 RFM23B-S1 RFM23B-S2 RFM23B-D Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com ...
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VCC S +1.8 to +3.6 V supply voltage. The recommended V GND S Ground reference. GPIO_0 I/O General Purpose Digital I/O that may be configured through the registers to perform ...
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... Mechanical Dimension 12.1 Mechanical Dimension:RFM22B Tel: +86-755-82973805 65 SMD PACKAGE（S1） SMD PACKAGE（S2） Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com ...
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Tel: +86-755-82973805 Fax: +86-755-82973550 DIP PACKAGE（D） E-mail: sales@hoperf.com http://www.hoperf.com 66 ...
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Mechanical Dimension:RFM23B Tel: +86-755-82973805 67 SMD PACKAGE（S1） SMD PACKAGE（S2） Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com ...
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Tel: +86-755-82973805 Fax: +86-755-82973550 DIP PACKAGE（D） E-mail: sales@hoperf.com http://www.hoperf.com 68 ...
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... Ordering Information = Part Number module type—operation band—package type RFM22B—433—D module type operation example：1，RFM22B module at 433MHz band, DIP : RFM22B-433-D。 2，RFM22B module at 868MHZ band, SMD, thickness at 4.9mm: RFM22B-868-S1。 Tel: +86-755-82973805 69 band Pac kage Fax: +86-755-82973550 E-mail: sales@hoperf ...
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... RFM22B/23B HOPE MICROELECTRONICS CO.,LTD Add:4/F, Block B3, East Industrial Area, Huaqiaocheng, Shenzhen, Guangdong, China Tel: 86-755-82973805 Fax: 86-755-82973550 Email: sales@hoperf.com t rade@hoperf.com Website: http://www.hoperf.com http://hoperf.en.alibaba.com Tel: +86-755-82973805 Fax: +86-755-82973550 This document may contain preliminary information and is subject to change by Hope Microelectronics without notice. Hope Microelectronics assumes no responsibility or liability for any use of the information contained herein ...