RFM67W HOPE | Alldatasheet
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Features
The RFM67W is a transmitter module which can operate in the 315, 433, 868 and 915 MHz licence free ISM bands. The transmitter module has two modes of operation, a conventional MCU controlled mode and a ‘stand-alone’ mode which enables the RFM67W to download configuration and messages from an E2PROM in response to a user input. Stand-alone mode makes the RFM67W ideal for miniaturized or low cost remote keyless entry (RKE) applications. It also offers the unique advantage of narrow- band and wide-band communication in a range of modulation formats. The RFM67W offers high RF output power and channelized operation suited for the European (ETSI EN 300-220-1), North American (FCC part 15.231, 15.247 and 15.249) and Japanese (ARIB T-67) regulatory standards.
APPLICATIONS
z Remote Keyless Entry (RKE) z Remote Control / Security Systems z Voice and Data RF Communication Links z Process and building / home control z Active RFID z AMR / AMI Platforms KEY PRODUCT FEATURES z +17 dBm to -18 dBm Programmable output power. z Bit rates up to 600 kbits / sec. z FSK, GFSK, MSK, GMSK and OOK modulation. z Stand-alone mode: No need for a host MCU. z Consistent RF performance over a 1.8 to 3.7 V range. z Low phase noise (-95 dBc/Hz at 50 kHz) with automated PLL calibration and fully integrated VCO and loop filter. z On chip RC timer for timer /wake-up applications. z Low battery detection. z Module size:19.7X16mm z Low cost RFM67W NOTE: In order to better use RFM67W modules, this specification also involves a large number of the parameters and functions of its core chip RF67's,including those IC pins which are not leaded out. All of these can help customers gain a better understanding of the performance of RFM67W modules, and enhance the application skills.
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com ADVANCED COMMUNICATIONS & SENSING DATASHEET Table of contents Section Page
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com Table of contents Section Page
This product datasheet contains a detailed description of the RFM67W performance and functionality. transmit this modulated signal in the 315, 433, 868 and 915 MHz licence free ISM bands. Figure 1. RFM67W Simplified Block Diagram settling times. For frequency modulation ((G)FSK and (G)MSK ), the modulation is performed within the PLL bandwidth. Optional pre-filtering of the bit stream may also be enabled to reduce the power delivered to adjacent channels. quadrature precision and reduce pulling effects during transmission. output impedance transformation, in dual PA mode, this can be increased to +17 dBm.
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com RFM 67W The RFM67W also includes two timing references; an RC oscill ator, for sleep mode operation of the SPI interface (in MCU mode), and a 32 MHz crystal oscillator, which serves as the low-noise frequency reference of the PLL. The references and supply voltages are provided by the power distribution system which includes several regulators allowing true battery powered operation. 1.2. Pin Diagram (TOP)
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com RFM 67W 1.3. Pin Description Table 1 Description of the RFM67W Pinouts Number Name Type
Description
S1 MOSI I/O SPI Data input/output
2 NSS I/O SPI Chip select input/output
3 CLKOUT O Reference clock output
4 PLL_LOCK O PLL lock detection, active high/low
5 DCLK O Output data clock
6 DATA I Modulation input data
7 SCK I SPI Clock input
8 MISO I/O SPI Data output/input
9 GND - RF Ground
10 ANA I/O RF signal output/input.
11 GND - RF Ground
12 GND - RF Ground
13 3.3V Main supply voltage from battery
14 GND - RF Ground
15 RESET I/O Reset, active high
16 PB(0) I
Low battery indicator output Push-button input 0, active high Push-button input 0, active high
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com RFM 67W 2. Electrical Characteristics 2.1. ESD Notice The RFM67W is an electrostatic discharge sensitive device. It satisfies: z Class 2 of the JEDEC standard JESD22-A114-B (human body model) on all other pins. 2.2. 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 3.9 V Tmr Temperature -55 115 ° C 2.3. Operating Range Operating ranges define the limits for functional operation and the parametric characteristics of the device as described in this section. Functionality outside these limits is not implied. Table 3 Operating Range Symbol VDDop Supply voltage 1.8 3.7 V Top Operational temperature range -40 85 ° C Clop Load capacitance on digital ports - 25 pF
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com RFM 67W 2.4. Electrical Specifications The table below gives the electrical specifications of the transmitter under the following conditions: Supply voltage = 3.3 V, temperature = 25 °C, fRF = 915 MHz, 2-level FSK modulation without prefiltering, Df = 5 kHz, bit rate = 4.8 kbit/s and output power = 13 dBm terminated in a matched 50 ohm impedance, unless otherwise specified. Table 4 Transmitter Specifications Symbol Description Conditions Min Typ Max Unit Current Consumption IDDSL Supply current in sleep mode - 0.5 1 µA IDDST Supply current in standby mode Crystal oscillator enabled - 0.9 1.2 mA IDDFS Supply current in synthesiser mode - 8 - mA IDDT Supply current in transmit mode with appropriate external match- ing (see Section 7). RF Power o/p = 17 dBm RF Power o/p = 13 dBm RF Power o/p = 10 dBm RF Power o/p = 0 dBm mA mA mA mA RF and Baseband Specifications BRF Bit rate, FSK Programmable. 1.2 - 600 kbps BRO Bit rate, OOK Programmable. 1.2 - 32 kbps FDA Frequency deviation, FSK Programmable 0.6 - 300 kHz RFOP RF output power in 50 ohms Programmable with 1 dB steps. Max Min -21 -18 dBm dBm PHN Transmitter phase noise 50 kHz Offset from carrier - -95 - dBc/ Hz RFOPH Max RF output power with an external impedance transforma- tion With external match to 50 ohms. 14 17 - dBm ACP Transmitter adjacent channel power (measured at 25 kHz off- set) Pre-filter enabled. Measurement conditions as defined by EN 300 220-1 V2.1.1. - - -37 dBm FR Synthesizer Frequency Range 315MHz Module 433MHz Module 868MHz Module 915MHz Module 290 431 862 890 340 510 890 1020 MHz MHz MHz MHz FSTEP Frequency synthesizer step FXOSC/219 - 61 - Hz FRC RC Oscillator frequency range 45 65 85 kHz Timing Specifications TS_FS Frequency synthesizer wake up time Crystal oscillator Enabled. - 100 150 µs
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com RFM 67W Symbol Description Conditions Min Typ Max Unit TS_TR Transmitter wake-up time Frequency synthesizer enabled. Note, depends upon bit rate and ramp time, please refer to Section 7.4. - 120 - µs TS_OS Crystal oscillator wake-up time - 300 500 µs FXOSC Crystal oscillator frequency For All Module 32 MHz TS_TT Total Wake up time Sleep to transmit, automated. Note, depends upon bit rate and ramp time, please refer to Section 7.4. - 450 - µs T_DATA Data set-up time - - 0.25 µs 3. Timing Characteristics The following table gives the operating specifications for the SPI interface of the RFM67W. Table 5 SPI Timing Specifications Symbol fSCK SCK Frequency - - 10 MHz tch SCK High time 50 - - ns tcl SCK Low time 50 - - ns trise SCK rise time - 5 - ns tfall SCK Fall time - 5 - ns tsetup MOSI Setup time From MOSI transition to SCK rising edge 30 - - ns thold MOSI hold time From SCK rising edge to MOSI tran- sition 20 - - ns tnl NSS setup time From NSS falling edge to SCK rising edge 30 - ns tnh,n NSS Hold time From SCK falling edge to NSS rising edge. 30 - - ns For explanatory diagrams of the timing characteristic parameters, please see Figure 7 and Figure 8.
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com 4. Working Modes of the RFM67W 4.1. Operating Modes The four operating modes of the RFM67W are shown in Table 6. Each of these may be selected via the SPI bus by writing the corresponding bits to Mode(2:0). A key feature of the RFM67W is that the transition from one operating mode to the next is automatically optimized. For example, if the transmit operating mode is selected whilst in sleep operating mode then, in a pre-defined time-optimized sequence, each of the intermediate modes is engaged sequentially without the need to issue any further SPI commands. For more information on timing and optimization please see Section 7.4. Table 6 RFM67W Operating Modes Enabled Blocks MODE(2:0) Selected Mode RC Osc SPI Xtal Osc Freq. Synth. PA
000 Sleep mode Optional x
001 Stand-by mode Optional x x
010 FS mode Optional x x x
011 Transmit mode Optional x x x x
4.2. Application Modes The RFM67W has two application modes, selected by applying an external logical level to the E2_MODE input. The first, MCU mode (E2_Mode= ‘0’), configures the RFM67W as an SPI slave. This permits the configuration of the circuit by an external microprocessor via the SPI interface of the RFM67W and the data to be applied via the DATA input (pin 13). The second application mode, stand-alone mode (E2_Mode = 0), sees the RFM67W configured as SPI master. In the stand- alone application mode the RFM67W can download its configuration from an external SPI E 2PROM. Moreover, in response to an input on the GPIO pins, a specific configuration can be programmed and a payload transmitted. Note that this mode selection process is performed at start up (or POR) of the circuit. Thus the hardware mode cannot be dynamically changed without resetting the ch ip. This may be achieved either by power down or by issuing an active high POR signal to the Reset input. For reset signal timing plea se see the diagram of Figure 13 and accompanying description. 4.2.1. Stand Alone Mode In stand alone mode (E2_Mode = ‘1’) the RFM67W will operate as a stand-alone SPI master which can download both register settings and data payload from an SPI E2PROM. Four debounced GPIO inputs are available in stand alone mode, in this application mode the RFM67W remains in sleep oper ating mode until either a single or combination of button presses are detected. RFM67W can then be dynamically reconfigured and / or transmit a data sequence stored within the E2PROM. The RFM67W can accommodate SPI E 2PROM sizes up to 8 kbit and uses industry standard SPI commands. For a full description of E 2PROM use with RFM67W and the associated application circuits, please see Section 6.1. The application circuit for stand-alone operation is shown in Figure 3, note that both matching and L M are band specific whilst CTX is application specific.
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com ADVANCED COMMUNICATIONS & SENSING DATASHEET 5. Operation of the RFM67W The RFM67W is an integrated ISM band transmitter module and features a fully integrated frequency synthesizer, modulator and power amplifier. This section describes the operation of the RFM67W and the functionality of these blocks. 5.1. Main Parameters 5.1.1. Center Frequency The carrier output center frequency, fRF, of the RFM67W is programmable via the SPI interface. It is determined by the following equation: where freq_rf(23:0) is the decimal value of the 24 bit number stored in configuration registers FrfMsb, FrfMid and FrfLsb and fXOSC is the frequency of the crystal oscilla tor. If the optimal value of 32 MHz is selected for the crystal oscillator, then this results in a programmable frequency resolution of 61.035 Hz. Note that RF output frequencies are only valid in the bands 290-340 MHz, 431-510 MHz and 862-1020 MHz. Note also, that for ease of use, the band selection process is performed automatically. 5.1.2. Frequency Deviation The frequency deviation of the RFM67W in FSK mode is given by the following equation: where df_coeff is the decimal value of the 14 bit contents of the FdevLsb and FdevMsb configuration registers. 5.1.3. Bit Rate The bit rate (or, depending upon coding, the chip rate) of the RFM67W is given by the following equation: where fXOSC is the crystal oscillator frequency, br_ratio is the decimal value of the 16 bit contents of registers BrMsb and BrLsb. Note that for OOK modulation the maximum bit rate is 32.7 kbps which corresponds to a br_ratio(15:0) of 979. The table below gives examples of some of the standard data rates accessible with RFM67W.
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com Table 7 Example Standard Bitrates and their Corresponding Register Settings. Type BrMSB BrLSB (G)FSK, (G)MSK OOK Rb Actual (to 7s.f.) 0x68 0x2B 1.2 kbps 1.2 kbps 1200.015 0x34 0x15 2.4 kbps 2.4 kbps 2400.060 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 Classical modem baud rates (multiples of 1.2 kbps) 0x00 0xD0 153.6 kbps 153846.1 0x02 0x2C 57.6 kbps 57553.95 Classical modem baud rates (multiples of 0.9 kbps) 0x01 0x16 115.2 kbps 115107.9 0x0A 0x00 12.5 kbps 12.5 kbps 12500.00 0x05 0x00 25 kbps 25 kbps 25000.00 0x80 0x00 50 kbps 50000.00 0x01 0x40 100 kbps 100000.0 0x00 0xD5 150 kbps 150234.7 0x00 0xA0 200 kbps 200000.0 0x00 0x80 250 kbps 250000.0 Round bit rates (multiples of 12.5, 25 and 50 kbps) 0x00 0x6B 300 kbps 299065.4 Watch Xtal frequency 0x03 0xD1 32.768 kbps 32.768 kbps 32753.32 5.2. Synthesizer The frequency synthesizer of the RFM67W is a fully integr ated fractional-N third-order sigma-delta phase-locked loop and VCO. Also incorporated are fully integrated third-order and low pass filters which determine the loop bandwidth. All of these features are fully automated and derived from the us er bitrate and frequency deviation settings, as described in Sections To ensure the frequency accuracy of the PLL output it is necessary to perform calibration. The calibration process is performed automatically upon power up of the RFM67W. However, the calibration feature is also accessible to the user via the SPI configuration register, PllStat (address 0x0A). The calibration is perform ed by setting bit 2 (pll_cal) high. This ensures that the frequency output accuracy is limited only by the frequency error of the crystal oscillator, the calibration procedure lasts 500 µs, during which time pll_cal_done (bit 4 of address 0x0A) is set low. Once complete pll_cal_done is set high and confirmation of a successful calibration can be obtained by reading pll_cal_ok.
to deliver the full 17 dBm of output power. Figure 5. Simplified Schematic of the RFM67W Power Amplifier
01 PA1 enabled -18 to 13 dBm -18 dBm + pow_val(4:0)
10 PA2 enabled - -
11 Dual PA -13 to 17 dBm -13 dBm + pow_val(4:0)
amplifiers, this must be done through an external RF choke.
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com 6. Digital Control and Interface The RFM67W has several operating modes, configuration parameters and internal status indicators which are stored in internal registers. In MCU mode, all of these registers can be accessed by an external microcontroller via the SPI interface. In stand alone mode, both the configuration information and the data to be transmitted, are stored in an external E2PROM. The way that both the configuration and payload information is stored in the E 2PROM must match the way the configuration is defined in the internal registers. For a full description see Section 6.1.2. 6.1. Stand Alone Mode 6.1.1. State Machine Description The stand alone mode is activated when the pin E2_Mode is ti ed to VDD. The RFM67W SPI interface is then configured in master mode. The internal state machine of the RFM67W then carries out the following operations: 1) Immediately after power-up, the SPI interface reads the main configuration section in the E2PROM and then goes into the ‘sleep’ operating mode (i.e. all blocks off). 2) Whilst in ‘sleep’ operating mode, when an edge is detected on any of the push-buttons PB[3:0], the chip wakes-up and starts the RC oscillator (typical startup time ~100 µs). 3) The RC oscillator is used to cloc k a debounce timer which gi ves the logical push button input value after the programmed delay. The frame section corresponding to the button value (1 to 15) is read from the E 2PROM. At this point additional, button specific, configuration information may be lo aded. Otherwise, the configuration settings of 1) are used. Using the appropriate configuration, the payload correspondin g to the detected button press is then transmitted. The payload transmission may be repeated up to 254 times. 4) When the frame has been transmitted, the pad PLL_LOCK goes low and the chip goes into SLEEP mode. 6.1.2. Memory Organization of the E 2PROM The memory map for stand alone mode is shown in Figure 6. The configuration information occupies the first 77 bytes, the format of the configuration is {ADDR; VALUE} - therefore allowing up to 38 registers to be defined. Each push button configuration is mapped directly to a location in the E 2PROM - determined by the mappings given in Table 9 and the variable section_size(5:0). The purpose of this variable, push button specific, section size is to allow the optimum use of different sizes of external memory. Note that the maximum frame length is 64 bytes - this equates to a maximum E2PROM size of 8 kbit. The influence of the section_size variable is illustrated in Figure 6. The mapping of Table 9 permits up to 15 frames to be def ined. Each section may contain both write_registers commands and the payload to be transmitted. Thus allowing the dynamic configuration of settings such as output power and frequency in response to a button push. Each section within the E 2PROM must conform to the following format: {FIFO_ADDR; number of times the frame is to be transmitted, LENGTH defines the number of bytes in the message and FIFO_ADDR = 0x95. The push-buttons may need to be debounced before being read. The debouncer time constant is programmed by the debounce_time(2:0) register which allows a range of debounce timer values to be accessed from 470 ms to 480 ms. An
Figure 6. Memory Mapping in Stand Alone Mode allows the use of a simple four button interface with the minimum memory size.
0000 None (no active push-button) 1000 3
require programming if they hold a value other than the default value (see table 11 for default register settings).
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com ST0002_01_US The following table gives an example snippet of E2PROM contents, here for each location in E2PROM memory the first 13 bytes of the available 77 (0x4C) bytes are occupied with config uration. The remaining bytes are left in their default 0xFF setting. The first push-button memory location is at 0x4D. Here we see that the periodic mode timer (see following section for a full description) is configured and a 10 byte payload follows. Subsequent push buttons are configured at the locations determined by the section size, see Figure 6. Table 10 Example External SPI E2PROM Contents for RFM67W Configuration Address Content Comment Address Content Comment 0x00 0x81 Start-up config. (address) 0x4C 0xFF Empty 0x01 0x05 Start-up config. (data) 0x4D 0x97 PB[0] config (address) 0x02 0x82 Start-up config. (address) 0x4E 0x00 PB[0] config (data) 0x03 0x00 Start-up config. (data) 0x4F 0x95 FIFO address 0x04 0x83 Start-up config. (address) 0x50 0x0A Repeat 0x05 0x03 Start-up config. (data) 0x51 0x0A Length 0x06 0x84 Start-up config. (address) 0x52 0x55 Start of PB[0] Payload 0x07 0x33 Start-up config. (data) 0x53 0x55 PB[0] Payload: Byte 1 0x08 0x85 Start-up config. (address) 0x54 0x55 PB[0] Payload: Byte 2 0x09 0xE3 Start-up config. (data) 0x55 0x55 PB[0] Payload: Byte 3 0x0A 0x90 Start-up config. (address) 0x56 0xAA PB[0] Payload: Byte 4 0x0B 0x0F Start-up config. (data) 0x57 0x0A PB[0] Payload: Byte 5 0x0C 0x93 Start-up config. (address) 0x58 0x0B PB[0] Payload: Byte 6 0x0D 0x1C Start-up config. (data) 0x59 0x0C PB[0] Payload: Byte 7 0x0E 0xFF Empty 0x5A 0x20 PB[0] Payload: Byte 8 0x0F 0xFF Empty 0x5B 0x00 PB[0] Payload: Byte 9 0x10-0x4B 0xFF 0x10 to 0x4B Empty 0x5C 0x97 PB[1] config (address) Subsequent button push button configuration and payloa d could follow at address 0x5C, respecting the E 2PROM section size constraint. Note that if register 0x00 is configured, care should be taken to enable transmit mode - mode(2:0) to ensure reliable transition to transmit mode. 6.1.3. Periodic mode Periodic mode is a sub-mode of stand alone mode wherein the RFM67W will periodically sense the push button inputs for activity. If a push button input is high then the payload acco rding to that input is transmitted. The wake-up interval, Twakeup, is defined by periodic_n(3:0) and periodic_d(3:0) values. Twa ke u p = 2 · TRC · (periodic_n(3:0) + 1 ) · 2 periodic_d(3:0) + 9
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com where TRC is the RC oscillator period, periodic_n is programmable between 0 and 15 and periodic_d may take values between 0 and 10. The maximum period is hence approximately 125 s when the frequency of the RC oscillator is 67 kHz. Push button mode is enabled when the value of D is non-zero and, when activated, all stand alone mode functionality is available. It is important to note that if there is no push button pressed, then no message will be transmitted. 6.1.4. Low Battery Indicator: Stand Alone Mode The low battery indicator may be used in stand alone mode to detect the battery voltage and send a low battery message to the receiver. It is enabled by setting the eol_frame_mode bit ‘high’ (register 0x12). The low battery state is determined by comparing the supply voltage with a 1.695 V to 2.185 V programmable threshold (threshold trim_eol(2:0), address 0x12). Following detection, the following actions are performed depending upon the exact mode of operation: Normal Operation (Non-Periodic): The battery end-of-life condition is checked during the normal frame. If it is true, then a single extra frame #14 (see Table 9) is automatically sent after the normal frame. Stand-Alone Periodic Mode Operation: The battery end-of-life condition is checked during the normal frame. If it is true, then the next frame, sent at the next timer tick is frame #14 (see Table 9), the frame is sent only once. 6.1.5. Low Battery Indicator: MCU Mode In MCU mode the low battery status indicator may be accessed and configured via the SPI register EolCtrl. Alternatively, the active high low battery indication is mapped to the PB0 pin allowing the independent generation of hardware interrupts. 6.2. MCU Mode 6.2.1. SPI Operation The first byte in any data transfer over the SPI is the address read/write byte. It comprises: 1. W/RB bit, which is 1 for write access and 0 for read access 2. 7 bits of address, MSB first. A transfer always starts by the NSS (not slave select) signal goi ng low whilst SCK is high. MOSI (master out - slave in) is generated by the master on the next falling edge of SCK and is sampled by the slave on the next rising edge of SCK. MISO is generated by the slave on the falling edge of SCK and is high impedance when NSS is high. By convention, all bytes are sent MSB first. MCU mode is activated when pad E2_Mode is tied to GND (ground). In this mode the RFM67W is configured as SPI slave and its internal configuration registers can be written following the format shown in Figure 7. An ‘address write-byte‘ followed by a data byte is sent for a write access. Where multiple sequential registers are to be written, the NSS input may be kept low after this first address- byte plus data-byte have been sent. In this state sequential data-bytes may be written, the address is automatically incr emented after the reception of each additional data-byte. This allows the sequential data-bytes to be written without the need for an address byte. NSS must then be set ‘high’ after the last byte transfer.
the rising edge of the data clock, DCLK, signal must be used to clock the data into the RFM67W DATA input. Figure 9. RFM67W Data Clock Timing Diagram (Used Only for Filtering and Ensuring Bit Rate Accuracies)
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com 6.3. RFM67W Register Description Table 11 RFM67W Register Summary Address Register Name 0x00 Mode Operating and modulation mode settings. 0x01 BrMsb 0x02 BrLsb Bit rate setting. 0x03 FdevMsb 0x04 FdevLsb Frequency Deviation (FSK). 0x05 FrfMsb 0x06 FrfMid 0x07 FrfLsb RF centre frequency setting. 0x08 PaCtrl PA selection and power control. 0x09 PaFskRamp PA rise and fall timing (FSK). 0x0A PllStat PLL status register. 0x0B VcoCtrl1 0x0C VcoCtrl2 0x0D VcoCtrl3 0x0E VcoCtrl4 VCO calibration values. 0x0F ClockCtrl Clock output pin settings. 0x10 Eeprom Stand alone mode E2PROM configuration. 0x11 ClockSel Selection between RC or crystal oscillator. 0x12 EolCtrl Low battery indicator settings. 0x13 PaOcpCtrl PA Over current protection - limits PA current. 0x14 unused - 0x15 unused - 0x16 unused - 0x17 PerDivider Periodic mode wake-up timer control. 0x18 BtnDeb Push button debouncer setting.
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com Table 12 RFM67W SPI Register Description Addr. Register Name Default Bits Variable Name Mode Description 7 - rw unused 6:4 mode(2:0) rw Operating mode: 000 sleep mode (SLEEP) 001 stand-by mode (STDBY) 010 frequency synthesizer mode (FS) 011 transmit mode (TX) others reserved Read value is always chip actual mode 3:2 modul_type(1:0) rw Modulation type:
00 FSK
01 OOK
1:0 data_shaping(1:0) rw Data shaping: In FSK: 00 no shaping 01 Gaussian filter with BT = 1.0 10 Gaussian filter with BT = 0.5 11 Gaussian filter with BT = 0.3 In OOK: 00 no shaping 01 filtering with fcutoff = bit rate 10 filtering with fcutoff = 2 * bit rate (BR <= 32 kb/s) 11 reserved 0x01 BrMsb 0x1A 7:0 br_ratio(15:8) rw Bit rate MSB (chip rate if Manchester encoding) 0x02 BrLsb 0x0B 7:0 br_ratio(7:0) rw Bit rate LSB (chip rate if Manchester encoding) Default value is 0x1A0B = 4.8 kbps 7:6 - - unused 0x03 FdevMsb 0x00 5:0 fdev_coeff(13:8) rw Deviation frequency MSB 0x04 FdevLsb 0x52 7:0 fdev_coeff(7:0) rw Deviation Frequency LSB Default = 0x0052 = 82, gives 5 kHz 0x05 FrfMsb 0xE4 7:0 freq_rf(23:16) rw RF carrier frequency MSB 0x06 FrfMid 0xC0 7:0 freq_rf(15:8) rw RF carrier centre bits
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com Addr. Register Name Default Bits Variable Name Mode Description 0x07 FrfLsb 0x00 7:0 freq_rf(7:0) rw RF carrier frequency LSB For fXOSC = 32 MHz, resolution = 61.035 Hz Default = 0xE4C000, gives 915 MHz 7 - r unused 6:5 pa_select rw Selects between PA1 and PA2 00 = unused 01 = PA1 selected (d) 10 = reserved 11 = PA1 and PA2 selected. 0x08 PaCtrl 0x3F 4:0 pow_val(4:0) rw Output power Pout = -18 dBm + pow_val Default is 13 dBm. 7:4 - r unused 0x09 PaFskRamp 0x08 3:0 pa_ramp_rising_time(3:0) rw Rise/fall time ramping (FSK only) 0000 = 2 ms 0001 = 1 ms 0010 = 500 us 0011 = 250 us 0100 = 125 us 0101 = 100 us 0110 = 62 us 0111 = 50 us 1000 = 40 us (d) 1001 = 31 us 1011 = 25 us 1010 = 20 us 1100 = 15 us 1101 = 12 us 1110 = 10 us 1111 = 8 us
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com Addr. Register Name Default Bits Variable Name Mode Description 7:6 - r unused 5 pll_lock_detect r PLL lock status: 0 = PLL not locked 1 = PLL locked 4 pll_cal_done r PLL calibration status 0 = Calibration on-going 1 = Calibration performed Note: Reset to 0 in sleep mode irrespective of calibration state. 3 pll_cal_ok r PLL Calibration Result 0 = Calibration procedure failed 1= Calibration procedure successful Note: Reset to 0 in sleep mode irrespective of calibration state 2 pll_cal_start w Triggers PLL calibration, always read as 0. 0x0A PllStat 0x10 1:0 pll_divr(1:0) rw PLL division ratio 00 = Automatic Others, PLL divider = PLL_divr 7:5 - r unused 0x0B VcoCtrl1 NA 4:0 SB1(4:0) rw VCO band first calibration value 7:5 - r unused 0x0C VcoCtrl2 NA 4:0 SB2(4:0) rw VCO band second calibration value 7:5 - r unused 0x0D VcoCtrl3 NA 4:0 SB3(4:0) rw VCO band third calibration value 7:5 - r unused 0x0E VcoCtrl4 NA 4:0 SB4(4:0) rw VCO band fourth calibration value 7:4 - r unused 3 rc_enable rw Enables RC oscillator. RC oscillator is also automatically switched on in E2PROM mode. 0 = RC oscillator off 1 = RC oscillator on 0x0F ClockCtrl 0x05 2:0 clkout_select rw Selects CLKOUT source: 000 = fXOSC (32 MHz) 001 = fXOSC / 2 (16 MHz) 010 = fXOSC / 4 (8 MHz) 011 = fXOSC / 8 (4 MHz) 100 = fXOSC / 16 (2 MHz) 101 = fXOSC / 32 (1 MHz) (d) 110 = RC clock (65 kHz) 111 = Clock output off. Note: Switching from RC to fXOSC or vice versa can generate glitches
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com Addr. Register Name Default Bits Variable Name Mode Description 7:6 - - unused 0x10 Eeprom 0x10 5:0 section_size(5:0) rw Section size, used in E2PROM mode only. 7:5 - r unused 4 xosc_ck_ext_sel rw Selects external clock instead of xosc 0 = use xosc 1 = use external clock 0x11 ClockSel 0x11 3:0 - r/w unused 7:5 - r unused 4 q_eol r Battery end of life flag 0 = VBAT < VTHR (Battery is flat) 1 = VBAT > VTHR 3 on_eol rw Enables EOL 0 = EOL disabled 1 = EOL enabled 0x12 EolCtrl 0x12 2:0 vthr_eol(2:0) rw Battery end of life threshold 000 = 1.695 V 001 = 1.764 V 010 = 1.835 V (default setting) 011 = 1.905 V 100 = 1.976 V 101 = 2.045 V 110 = 2.116 V 111 = 2.185 V 7:5 - r unused 4 on_ocp rw Enables power amplifier current limiter: 0 = OCP disabled 1 = OCP enabled 0x13 PaOcpCtrl 0x11 3:0 trim_ocp(3:0) rw PA OCP DC load current threshold: 0000 = 45 mA 0001 = 50 mA 0010 = 55 mA 0011 = 60 mA 0100 = 65 mA 0101 = 70 mA 0110 = 75 mA 0111 = 80 mA 1000 = 85 mA 1001 = 90 mA 1010 = 95 mA 1011 = 100 mA (default setting) 1100 = 105 mA (recommended +17 dBm setting) 1101 = 110 mA 1110 = 115 mA 1111 = 120 mA 0x14 Unused - - - - unused
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com Addr. Register Name Default Bits Variable Name Mode Description 0x15 Unused - - - - - 0x16 Unused - - - - unused 7:4 periodic_d(3:0) rw Periodic mode D divider (values from 1 to 10) 0x17 PerDivider 0x00 3:0 periodic_n(3:0) rw Periodic mode N divider (values from 0 to 15) T = 2 T (periodic_n(3:0) + 1 ) · 2periodic_d(3:0) + 9 wak e RC Note: Only available in E2PROM Mode and when N>0 (N = 0 = disabled) 7:3 - r unused 0x18 BtnDeb 0x03 2:0 debounce_time(2:0) rw Push button debounce tim constant: 000 = 470 us 001 = 7.5 ms 010 = 15 ms 011 = 30 ms (d) 100 = 60 ms 101 = 120 ms 110 = 240 ms 111 = 480 ms 7. RFM67W Application Circuits 7.1. Typical Application Schematic
Figure 14. Note that after the PLL lock indicator is set then the transmitter requires TS_TR to set-up before transmission
7.3 Reset Pin Timing
reset operation the user must wait 5 ms before performing any other operation.
- Reference Design Performance
This section details the measured typical performance of the reference design described in the preceding section. Figure 24. Typical Power Consumption of the Reference Design versus Measured and Programmed Power enhanced efficiency for operation below this programmed power output. disabled or the limit adjusted to 100 mA accordingly.
The RFM67W reference design power output flatness as a function of voltage and temperature is shown below.
3.6 V, 25 C
3.3 V, 25 C
1.8 V, 25 C
3.6 V, 90 C
3.3 V, 90 C
1.8 V, 90 C
3.6 V, -45 C
3.3 V, -45 C
1.8 V, -45 C
Figure 25. Typical 17 dBm Output Power Flatness versus Supply Voltage and Temperature, Measured in the
868 MHz ISM Band
Figure 26. Typical 17 dBm Output Power Flatness versus Supply Voltage and Temperature, Measured in the
915 MHz ISM band
the channel bandwidth for operation in the 868 MHz ISM band is reduced to below 200 kHz. Figure 31. The Influence of Gaussian Filtering on the Modulation Bandwidth (Wideband)
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com RF67 9. Packaging Information Figure 35: S2 Packaging Outline Drawing
T el: +86-755-82973805 F ax: +86-755-82973550 E -mail: sales@hoperf.com http:// www.hoperf.com RF67 10. Ordering Information RFM67W —433 S2 P/N: RFM67W-315S2 RFM67W module at 315MHz band, SMD Package P/N: RFM67W-433S2 RFM67W module at 433MHz band, SMD Package P/N: RFM67W-868S2 RFM67W module at 868MHz band, SMD Package P/N: RFM67W-915S2 RFM67W module at 915MHz band, SMD Package HOPE MICROELECTRONICS CO.,LTD Add: 2/ F, Building 3, Pingshan Private Enterprise Science and Technology Park, Lishan Road, XiLi Town, Nanshan District, Shenzhen, Guangdong, China Tel: 86-755-82973805 Fax: 86-755-82973550 Email: sales@hoperf.com Website: http://www.hoperf.com http://www.hoperf.cn 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. Nothing in this document shall operate as an express or implied license or indemnity under the intellectual property rights of Hope Microelectronics or third parties. The products described in this document are not intended for use in implantation or other direct life support applications where malfunction may result in the direct physical harm or injury to persons. NO WARRANTIES OF ANY KIND, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MECHANTABILITY OR FITNESS FOR A ARTICULAR PURPOSE, ARE OFFERED IN THIS DOCUMENT. ©2006, HOPE MICROELECTRONICS CO.,LTD. All rights reserved. Package Operation Band Mode Type