RFM42B-868-S1 QUASAR, RFM42B-868-S1 Datasheet
RFM42B-868-S1
Specifications of RFM42B-868-S1
Related parts for RFM42B-868-S1
RFM42B-868-S1 Summary of contents
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... RFM43B and +1 to +20dBm on the RFM42B.Power adjustments high level of integration offers reduced BOM cost while simplifying the overall system design. The RFM42B’s Industry leading +20dBm output power ensures link performance. extended range and improved Additional system features such as an automatic wake-up timer, low battery detector, 64 byte TX FIFO, and automatic packet handling reduce overall current consumption and allow the use of lower-cost system MCUs ...
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... Smart Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 7.2. Microcontroller Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36 7.3. General Purpose ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 7.4. Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38 7.5. Low Battery Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 7.6. Wake-Up Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 7.7. GPIO Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 8. Reference Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9. Application Notes and Reference Designs . . . . . . . . . . . . . . . . . . . . . . . 10. Pin Descriptions: RFM42B/43B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com Page . . ...
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... RFM42B/43B 11. Mechanical Dimension: RFM42B/ 43B . . . . . . . . . . . . . . . . . . . . . . . 12. Ordering Information: RFM42B/43B Contact Information Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com . . . . . . . . . . . . . . . ...
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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] = 111 (+13 dBm) txpow[2:0] = 011 (+1 dBm) E-mail: sales@hoperf.com http://www.hoperf.com RFM42B/43B Min Typ Max Units 1.8 3.0 3.6 V — ...
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... RFM42B/43B Table 2. Synthesizer AC Electrical Characteristics Parameter Symbol Synthesizer Frequency F Range—RFM42B/43B Synthesizer Frequency F RES-LB Resolution F RES-HB Reference Frequency f REF_LV Input Level Synthesizer Settling Time t LOCK F Residual FM Phase Noise L(f Tel: +86-755-82973805 Fax: +86-755-82973550 5 Conditions 433MHz band 868MHz band SYN 915MHz band ...
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... Parameter Symbol TX Frequency Range—RFM42B/43B FSK Data Rate DR OOK Data Rate DR Modulation Deviation Modulation Deviation Δf Resolution Output Power Range —RFM42B Output Power Range—RFM43B Output Steps Output Level Variation vs. Temperature Output Level Variation vs. Frequency Transmit Modulation Filtering ...
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... RFM42B/43B Table 4. Auxiliary Block Specifications Parameter Symbol Temperature Sensor Accuracy Temperature Sensor Sensitivity Low Battery Detector LBD Resolution Low Battery Detector LBD Conversion Time Microcontroller Clock Output Frequency General Purpose ADC ADC Resolution General Purpose ADC Bit ADC Resolution Temp Sensor & General ...
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... DRV<1:0>=LH OmaxLH I DRV<1:0>=HL OmaxHL I DRV<1:0>=HH OmaxHH V I < I source Omax V =1 < I sink Omax V =1 E-mail: sales@hoperf.com http://www.hoperf.com RFM42B/43B Min Typ Max = 5 pF — — — — L — — V – 0.6 — DD — –100 — =1 – 0.6 — DD =1.8 V — ...
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... RFM42B/43B Table 7. Absolute Maximum Ratings V to GND DD Instantaneous V to GND on TX Output Pin RF-peak Sustained V to GND on TX Output Pin RF-peak Voltage on Digital Control Inputs Voltage on Analog Inputs Operating Temperature Range (special crystal is used on the module) T Operating Temperature Range (Normal crystal is used on the module) T Thermal Impedance ...
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... The transmit FSK data is modulated directly into the data stream and can be shaped by a Gaussian low-pass filter to reduce unwanted spectral content. The RFM42B’s PA output power can be configured between +1 and +20dBm in 3dB steps, while the RFM43B's PA output power can be configured between –8 and +13 dBm in 3dB steps. ...
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... Select high period SW To read back data from the RFM42B /43B, 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 n the SDI pin when R The next eight negative edge transitions of the SCLK signal will clock out the contents of the selected register ...
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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 3 and a burst read in Figure 4. As long as nSEL is held low, input data will be latched into the RFM42B/43B every eight SCLK cycles. First Bit RW ...
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... Operating Mode Control There are three primary states in the RFM42B/43B radio state machine: SHUTDOWN, IDLE, and TX (see Figure 5). 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. " ...
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... RFM42B/43B 3.2.1. SHUTDOWN State The SHUTDOWN state is the lowest current consumption state of the device with nominally less than current consumption. The SHUTDOWN state may be entered by driving the SDN pin high. The SDN pin should be held low in all states except the SHUTDOWN state. In the SHUTDOWN state, the contents of the registers are lost and there is no SPI access ...
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... By default, the VCO and PLL are calibrated every time the PLL is enabled. 3.2.4. Device Status Add R/W Function/Description 02 R Device Status The operational status of the chip can be read from "Register 02h. Device Status". Tel: +86-755-82973805 Fax: +86-755-82973550 ffovfl ffunfl Reserved Reserved E-mail: sales@hoperf.com http://www.hoperf.com RFM42B/43B POR Def. freqerr cps[1] cps[0] — 15 ...
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... RFM42B/43B 3.3. Interrupts The RFM42B/43B 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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System Timing The system timing for TX mode is shown in Figure 6. The figures demonstrate transitioning from STANDBY mode to TX mode through the built-in sequencer of required steps. The user only needs to program the desired mode, ...
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... Frequency Programming In order to transmit an RF signal, the desired channel frequency, f RFM42B/43B . Note that this frequency is the center frequency of the desired channel. The carrier frequency is generated by a Fractional-N Synthesizer, using 10 MHz both as the reference frequency and the clock of the (3 order) ΔΣ modulator. This modulator uses modulo 64000 accumulators. This design was made to obtain the desired frequency resolution of the synthesizer ...
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... MHz 45 450–459.9 MHz 46 460–469.9 MHz 47 470–479.9 MHz E-mail: sales@hoperf.com http://www.hoperf.com RFM42B/43B hbsel=1 480–499.9 MHz 500–519.9 MHz 520–539.9 MHz 540–559.9 MHz 560–579.9 MHz 580–599.9 MHz 600–619.9 MHz 620–639.9 MHz 640– ...
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... RFM42B/43B 3.5.2. Easy Frequency Programming for FHSS While Registers 73h–77h may be used to program the carrier frequency of the RFM42B/43B 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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... R/W Modulation Mode Control 2 trclk[1] trclk[0] dtmod[1] dtmod[0] eninv fd[8] modtyp[1] modtyp[0] 72 R/W Frequency Deviation Tel: +86-755-82973805 Fax: +86-755-82973550 f f carrier Figure 7. Frequency Deviation fd[7] fd[6] fd[5] fd[4] E-mail: sales@hoperf.com http://www.hoperf.com RFM42B/43B Time POR Def. fd[3] fd[2] fd[1] fd[0] 00h 20h 21 ...
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... RFM42B/43B 3.5.5. Frequency Offset Adjustment A frequency offset can be adjusted manually by fo[9:0] in registers 73h and 74h. The frequency offset adjustment is implemented by shifting the Synthesizer Local Oscillator frequency. This register is a signed register so in order to get a negative offset it is necessary to take the twos complement of the positive offset number. The offset can be ...
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... Modulation Options 4.1. Modulation Type The RFM42B/43B supports three different modulation options: Gaussian Frequency Shift Keying (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 8 demonstrates the difference between FSK and GFSK for a Data Rate of 64 kbps ...
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... RFM42B/43B 4.2. Modulation Data Source The RFM42B/43B 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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... Gaussian lowpass filter function to apply to the incoming data. One advantage of this mode that it saves a microcontroller pin because no TX Clock output function is required. The primary disadvantage of this mode is the increase in occupied spectral bandwidth with FSK (as compared to GFSK). Tel: +86-755-82973805 Fax: +86-755-82973550 TX Data Clock Configuration E-mail: sales@hoperf.com http://www.hoperf.com RFM42B/43B 25 ...
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... RFM42B/43B 4.2.2.3. Direct Mode using SPI or nIRQ Pins In certain applications it may be desirable to minimize the connections to the microcontroller or to preserve the GPIOs for other uses. For these cases it is possible to use the SPI pins and nIRQ as the modulation clock and data. The SDO pin can be configured to be the data clock by programming trclk = 10. If the nSEL pin is LOW then the function of the pin will be SPI data output ...
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... VCO calibration may be skipped by setting the appropriate register. 5.2. Power Amplifier The RFM42B contains an internal integrated power amplifier (PA) capable of transmitting at output levels between-1 and +20dBm. The RFM43B contains a PA which is capable of transmitting output levels between –8 to +13 dBm. The PA can chang the output power by adjusting txpow[2:0] will scale both the output power and current but the efficiency will not be constant ...
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... RFM42B/43B 5.2.1. Output Power Selection With the RFM42B,the output power is configurable steps with the txpow[2:0] field in "Register 6Dh. TX Power." Extra output power can allow the use of a cheaper, smaller antenna reducing the overall BOM cost. The higher power setting of the chip achieves maximum possible range, but of course comes at the cost of higher TX current consumption ...
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... Crystal Oscillator The RFM42B/43B includes an integrated 30 MHz crystal oscillator with a fast start-up time of less than 600 µs A parallel resonant 30MHz crystal is used on the module. Th capacitance integrated on-chip to minimize the number of external components. crystal load The crystal load capacitance can be digitally programmed to accommodate crystals with various load capacitance requirements and to adjust the frequency of the crystal oscillator. The tuning of the crystal load capacitance is programmed through the xlc[6:0] field of " ...
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... RFM42B/43B 6. Data Handling and Packet Handler The internal modem is designed to operate with a packet including a 10101... preamble structure. To configure the modem to operate with packet formats without a preamble or other legacy packet structures contact customer support. 6.1. TX FIFO A 64 byte FIFO is integrated into the chip for TX, as shown in Figure 11. "Register 7Fh. FIFO Access" is used to access the FIFO. A burst write, as described in " ...
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... Tel: +86-755-82973805 Fax: +86-755-82973550 autotx txafthr[4] txafthr[3] txafthr[2] txafthr[1] txafthr[0] control the configuration for Packet Handling. The Data Figure 12. Packet Structure E-mail: sales@hoperf.com http://www.hoperf.com RFM42B/43B POR Def. Reserved Reserved ffclrtx 00h 37h 04h CRC Bytes 31 ...
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... RFM42B/43B Figure 13. Multiple Packets in TX Packet Handler Add R/W Function/Description 30 R/W Data Access Control 31 R EzMAC status 32 33 R/W Header Control 2 34 R/W Preamble Length 36 R/W Sync Word 3 37 R/W Sync Word 2 38 R/W Sync Word 1 39 R/W Sync Word 0 3A ...
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... First 4bits of the synch. word = 0x2 First 4bits of the synch. word = 0x2 Figure 15. Manchester Coding Example E-mail: sales@hoperf.com http://www.hoperf.com RFM42B/43B CRC (Over data only) Data CRC Data before Manchester 1 0 Data after Machester ( manppol = 1, enmaninv = 0) Data after Machester ( manppol = 1, enmaninv = 1) ...
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... RFM42B/43B 6.6. TX Retransmission and Auto TX The RFM42B/43B 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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... Auxiliary Functions 7.1. Smart Reset The RFM42B/43B 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: Initial power on, VDD starts from gnd: reset is active till V ...
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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 RFM42B/43B 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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... Input MUX aoffs [4:0] soffs [3:0] adcgain [1:0] adcsel [2:0] Ref MUX adcref [1: adcstart/adcbusy adcsel[2] adcsel[1] adcsel[0] adc[7] adc[6] adc[5] adc[4] E-mail: sales@hoperf.com http://www.hoperf.com RFM42B/43B / /3. A programmable 8-bit ADC V in adc [7:0] V ref 0 -1020mV / 0-255 adcref[1] adcref[0] adcgain[1] adcgain[0] soffs[3] ...
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... RFM42B/43B 7.4. Temperature Sensor An integrated on-chip analog temperature sensor is available. The temperature sensor will be automatically enabled when the temperature sensor is selected as the input of the ADC or when the analog temp voltage is selected on the analog test bus. The temperature sensor value may be digitized using the general-purpose ADC and read out over the SPI through " ...
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... Temperature Measurement with ADC8 300 250 200 150 100 50 0 -40 -20 Figure 18. Temperature Ranges using ADC8 Tel: +86-755-82973805 Fax: +86-755-82973550 Temperature [Celsius] E-mail: sales@hoperf.com http://www.hoperf.com RFM42B/43B Sensor Range 0 Sensor Range 1 Sensor Range 2 Sensor Range 3 100 39 ...
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... RFM42B/43B 7.5. Low Battery Detector A low battery detector (LBD) with digital read-out is integrated into the chip. A digital threshold may be programmed into the lbdt[4:0] field in "Register 1Ah. Low Battery Detector Threshold." When the digitized battery voltage reaches this threshold an interrupt will be generated on the nIRQ pin to the microcontroller. The microcontroller can confirm source of the interrupt by reading " ...
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Wake-Up Timer The chip contains an integrated wake-up timer which can be used to periodically wake the chip from SLEEP mode. The wake-up timer runs from the internal 32.768 kHz RC Oscillator. The wake-up timer can be configured to ...
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... RFM42B/43B WUT Period GPIOX =00001 nIRQ SPI Interrupt Read Chip State Sleep Ready 1.5 mA Current Consumption WUT Period GPIOX =00001 nIRQ SPI Interrupt Read Chip State Current Consumption Figure 19. WUT Interrupt and WUT Operation Tel: +86-755-82973805 Fax: +86-755-82973550 42 Interrupt Enable enwut =1 ( Reg 06h) ...
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... The GPIO settings for GPIO1 and GPIO2 are the same as for GPIO0 with the exception of the 00000 default setting. The default settings for each GPIO are listed below: For a complete list of the available GPIO's see “ RFM42B/43B Register Descriptions.” The GPIO drive strength may be adjusted with the gpioXdrv[1:0] bits. Setting a higher value will increase the drive strength and current capability of the GPIO by changing the driver size ...
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... RFM42B/43B 8. Reference Design Figure 20A.RFM42B Reference Design Schematic Figure 20B.RFM43B Reference Design Schematic Tel: +86-755-82973805 Fax: +86-755-82973550 44 E-mail: sales@hoperf.com http://www.hoperf.com ...
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... R/W Frequency Hopping Channel Select 7A R/W Frequency Hopping Step Size 7C R/W TX FIFO Control 1 7D R/W TX FIFO Control R/W FIFO Access Note: Detailed register descriptions are available in “RFM42B/43B Register Descriptions.” Tel: +86-755-82973805 45 Table 15. Register Descriptions ffovfl ffunfl ifferr itxffafull itxffaem Reserved ...
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... Pin Descriptions: RFM42B/43B Tel: +86-755-82973805 RFM42B/43B-S1 RFM42B/43B-S2 RFM42B/43B-D Fax: +86-755-82973550 E-mail: sales@hoperf.com RFM42B/43B http://www.hoperf.com 46 ...
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... RFM42B/43B 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 ANT I/O NC Tel: +86-755-82973805 47 +1.8 to +3.6 V supply voltage. The recommended V Ground reference. General Purpose Digital I/O that may be configured through the registers to perform various functions including: Microcontroller Clock Output, FIFO status, POR, Wake-Up timer, Low Battery Detect, TRSW, AntDiversity control, etc ...
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... Mechanical Dimension:RFM42B/43B Tel: +86-755-82973805 SMD PACKAGE（S1） SMD PACKAGE（S2） Fax: +86-755-82973550 E-mail: sales@hoperf.com RFM42B/43B http://www.hoperf.com 48 ...
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... RFM42B/43B Tel: +86-755-82973805 49 DIP PACKAGE（D） Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com ...
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... Part Number module type—operation band—package type = RFM42B/43B—433—D module type operation band example：1，RFM43B module at 433MHz band, DIP : RFM43B-433-D。 2，RFM42B module at 868MHZ band, SMD, thickness at 4.9mm: RFM42B-868-S1。 Tel: +86-755-82973805 Package Fax: +86-755-82973550 E-mail: sales@hoperf.com RFM42B/43B http://www ...
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... RFM42B/43B HOPE MICROELECTRONICS CO.,LTD Add:4/F, Block B3, East Industrial Huaqiaocheng, Shenzhen, Guangdong, China Tel: 86-755-82973805 Fax: 86-755-82973550 Email: sales@hoperf.com rade@hoperf.com t Website: http://www.hoperf.com http://hoperf.en.alibaba.com Tel: +86-755-82973805 Fax: +86-755-82973550 5 1 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 ...