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1 / 15 www.onsemi.com ax - sigfox - mods/d datasheet ax- sigfox - mods revision 2 ax- sigfox ministamp ax- sigfox antstamp ultra - low power, at command controlled, sigfox compliant module s ax- sigfox ministamp /antstamp m odule s (note that the act ual product comes with a metal cap ) overview the ax - sigfox modules are ultra - low power module solutions for a node on the sigfox network with both up - and do wn - link functionality. the ax - sigfox modules connect to the customer application using a logic level rs232 uart. at commands are used to send frames and configure radio parameters. the ax - sigfox module comes in two flavors ? ax - sigfox ministamp with 50 ohm antenna port ? ax - sigfox antstamp with on - board 0 dbi chip antenna
2 / 15 www.onsemi.com ax - sigfox - mods/d functionality and axsem ecosystem ? sigfox up - link and down - link functionality controlled by at commands ? the ax - sigfox modules are part of a whole development and product ecosystem available from axsem for any sigfox requirement. other parts of the e cosystem include o ax - sigfox ultra - low power, at command controlled, sigfox compliant transceiver ic o ready to go ax - sigfox development kit with fully functional ax - sigfox module including sigfox subscription o sigfox ready certified reference design for the ax - sigfox ic o ax - sigfox api ic for customers wishing to write their own application software based on the axsem sigfox library general features ? 18.2 x 22 x 3 mm 3 without chip antenna, 18.2 x 39.7 x 3 mm 3 with chip a ntenna ? supply range from 1.8 v to 3.3 v ? - 40c to 85c ? temperature sensor ? supply voltage measurements ? 10 gpio pins o 4 gpio pins with selectable voltage measure functionality, differential (1v or 10v range) or single ended (1v range) with 10 bit resolution o 2 gpio pins with selectable sigma delta dac output functionality o 2 gpio pins with selectable output clock o 3 gpio pins selectable as spi master interface power consumption ? ultra - low power consumption o charge required to send a sigfox oob packet at 14 dbm out put power: 0.29 c o deepsleep mode current: 5 00 na o sleep mode current: 1.6 a o standby mode current : 0.5 ma o continuous radio reception at 869.525 mhz: 13 ma o continuous radio transmission at 868.130 mhz for 14 dbm output power : 51 ma for 0 dbm output power: 21 ma ? the output power of ax - sigfox modules can be programmed in 1 db steps from 0 dbm ? 14 dbm. they are optimized for best power efficiency at 14 dbm output power. for modules optimized for other output power values e.g 0 dbm transmission with 10 ma ple ase contact us. high performance nar row - band sigfox receiver ? carrier freq uencies 868.525 mhz ? data - rate 600 bps ? sensitivity - 126 dbm @ 600 bps, 869.525 mhz, g fsk ? 0 dbm maximum input power highly efficient transmitter ? carr ier frequencies 868.13 mhz ? data - rate 100 bps ? maximum output power 14 dbm ? power level programmable in 1 dbm steps from 0 dbm to 14 dbm regulatory ? sigfox ready certified ? en 300 220
3 / 15 www.onsemi.com ax - sigfox - mods/d about the sigfox tec hnology sigfox uses an ultra narrow band (unb) based radio technology to connect devices to its global network. the usage of unb is key to providing a scalable, high - capacity network, with very low energy consumption, while maintaining a simple and easy to rollout star - based cell infrastructure. the network operates in the globally available ism bands (license - free frequency bands) and co - exists in these frequencies with other radio technologies, but without any risk of collisions or capacity problems. sigfox currently uses the most popular european ism band on 868 mhz (as defined by etsi and cept) as well as 902 mhz in the usa (as defined by the fcc), depending on specific regional regulations. sigfox only acts as a transport channel, pushing the data towards the custo mer's it system. an important advantage provided by the use of the narrow band technology is the flexibility it offers in terms of antenna design. on the network infrastructure end it allows the use of small and simple antennas, but more importantly, it a llows devices to use inexpensive and easily customizable antennas. the sigfox protocol is compatible with existing transceivers and is actively being ported to a growing number of platforms.
4 / 15 www.onsemi.com ax - sigfox - mods/d pinout ministamp antstamp p in name function 1* gnd g round 2* nc do not connect 3* nc 4* nc 5* gnd g round 6* ant 50 ? 50 ohm antenna port 7* gnd g round 8* nc do not connect 9 nc 10 gpio8 general purpose io 11 gpio7 general purpose io, selectable spi functionality (miso) 12 gpio6 general purpose io, selectable spi functionality (mosi) 13 gpio5 general purpose io, selectable spi functionality (sck) 14 gpio4 general purpose io, selectable ? dac functionality, selectable clock functionality 15 cpu_ led module activity status, enabled whenever the module is running 16 radio_ led radio activity status 17 vtcxo tcxo enable (used to control the on - board tcxo) 18 gpio9 general purpose io and wake - up from deepsleep 1 9 uart_ tx uart used to communicate with the module at a bitrate of 9600 baud, no parity, 8 data bits and one stop bit. 20 uart_ rx 2 1 rx_ led radio receive activity status 2 2 tx_ led radio transmit activity status 23 nc do not connect 24 nc 25 vdd power s upply 26 gnd g round 27 reset_n optional reset ( active low ) . do not connect the pin if not used. 28 gnd g round 29 gpio0 general purpose io, selectable adc functionality, selectable ? dac functionality, selectable clock functionality 30 gpio1 general purpose io, selectable adc functionality 31 gpio2 general purpose io, selectable adc functionality 32 nc do not connect 33 nc 34 gpio 3 general purpose io, selectable adc functionality all digital pins are schmitt trigger inputs, digital input and output levels are lvcmos/lvttl compatible. pins gpio[ 3:0] must not be driven above vdd, all other digital inputs are 5v tolerant. all gpio pins and uart_rx start - up as inputs with pull - up.
5 / 15 www.onsemi.com ax - sigfox - mods/d dimensions (mm) ministamp antstamp all dimensions in millimeter. the area un der the module s must be covered in solder stop. to guarantee good antenna performance with the ax - sigfox antstamp, t he left part of the module must remain free from any copper (i.e. no ground plane and no traces ). 4 . 8 2 2 1 . 8 1 8 2 1 1 3 9 . 7 1 . 8 1 8 2 1 1 3 . 8 3 . 8 2 . 7 2 . 9 1 . 3 1 . 3 4 . 8 2 2 1 . 8 1 . 2 x 1 . 9 p i n 1 x n o c o p p e r i n t h i s a r e a
6 / 15 www.onsemi.com ax - sigfox - mods/d specifications supplies sym description condition min typ max unit t amb operational ambient temperature - 40 27 85 c vdd s upply voltage 1.8 3.0 3. 3 v i ds deep sleep mode current at$p=2 5 00 na i slp sleep mode current at$p=1 1. 6 a i stdby standby mode current 0.5 ma continuous r eceive i rx_cont current consumption in sigfox rx test mode at$sr=1,1, - 1 12.8 ma transmit at 14 dbm output power / r eceive i txmodavg _ 14 modulated transmitter current 5 1 .0 ma q sfx_oob_14 charge to send a sigfox out of band message at$s0 0. 28 c q sfx_oob_ 14 energy to send a bit at$sb=0 0. 19 c q sfx_oob_ 14 energy to send a bit with download receive message at$s b=0,1 0.3 3 c q sfx_lfr_14 energy to send the longest possible sigfox frame (12 byte) at$sf= 00112233445566778899aabb 0.3 7 c q sfx_lfr_14 energy to send the longest possible sigfox frame (12 byte) with downlink receive at$sf= 00112233445566778899aabb , 1 0.4 6 c transmit at 0 dbm output power /receive note1 i txmodavg_14 modulated transmitter current 21.0 ma q sfx_oob_0 charge to send a sigfox out of band message at$s0 0.12 c q sfx_oob_0 energy to send a bit at$sb=0 0. 08 c q sfx_oob_0 energy to send a bit with download receive message at$sb=0,1 0. 14 c q sfx_lfr_ 0 energy to send the longest possible sigfox frame (12 byte) at$sf= 00112233445566778899aabb 0.27 c q sfx_lfr_ 0 energy to send the longest possible sigfox frame (12 byte) with downlink receive at$sf= 00112233445566778899aabb , 1 0.2 9 c note 1 : the output power of ax - sigfox modules can be programmed in 1 db steps from 0 dbm ? 14 dbm. they are optimized for best power efficiency at 14 dbm output power. for modules optimized for other output power values e.g 0 dbm transmission with 10 ma plea se contact us. typical current wave form
7 / 15 www.onsemi.com ax - sigfox - mods/d battery life calculation example scenario for example calculation : ? 2 aaa alkaline batteries in series ? one oob frame transmission per day at 14 dbm output power ? four maximum length frames with downlink receive per day at 14 dbm output power ? device in sleep mode when no other activity ? neglecting battery self discharge 2 aaa alkaline capacity 1500 mah * 3600 s/h 5400 c sleep charge per day 1. 6 a * 86400 s 0.14 c/day oob frame transmission 0.28 c/day frame transmission with downlink 4 * 0.46 c/day 1.84 c/day total charge consu mption 2.26 c/day battery life 6.5 years logic sym description condition min typ max unit digital inputs v t+ schmitt trigger low to high threshold point vdd = 3.3 v 1.55 v v t - schmitt trigger high to low threshold point 1.25 v v il input voltage, low 0.8 v v ih input voltage, high 2.0 v v ipa input voltage range, gpio[3:0] - 0.5 vdd v v ipbc input voltage range, gpio[9:4], uart _ rx, reset_n - 0.5 5.5 v i l input leakage current - 10 10 a r pu programmable pull - up r esistance 65 k ? digital outputs i oh output current, high p orts gpio[9:0], uart _ tx, tx _ led, rx _led, cpu_led, radio_ led v oh = 2.4 v 8 ma i ol output current, low gpio[9:0], uarttx, txled, rxled, txled, cpuled v ol = 0.4 v 8 ma i oz tri - state output leakage current - 10 10 a transmitter sym description condition min typ max unit sbr signal bit rate 100 bps f carrier carrier frequency 868.13 mhz ptx min lowest transmitter output power at$cw=868130000,1,0 0 dbm ptx max highest transmitter output power at$cw=868130000,1,14 14 dbm ptx step programming step size output power 1 db dtx temp transmitter power variation vs. temperature - 40 c to +85 c +/ - 0.5 db dtx vdd transmitter power variation vs. vdd 1.8 to 3.3 v +/ - 0.5 db ptx harm2 emission @ 2 nd harmonic - 51 dbc ptx harm 3 emission @ 3 rd harmonic - 63 dbc ptx harm 4 emission @ 4 th harmonic - 84 dbc
8 / 15 www.onsemi.com ax - sigfox - mods/d receiver sym description condition min typ max unit sbr signal bit rate 6 00 bps f carrier carrier frequency 869.525 mhz is sensitivity at$sb=x,1, at$sf=x,1, at$sr per < 0.1 - 1 26 dbm blk blocking at +/ - 10mhz offset wanted signal is 3 db above the typical sensitivity limit (per=0.1) and the blocker is a continuous wave 78 db adc / temperature sensor sym description condition min typ max unit adcre s adc resolution 10 bit v adcref adc reference voltage 0.95 1 1.05 v z adc00 input capacitance 2.5 pf dnl differential nonlinearity +/ - 1 lsb inl integral non l inearity +/ - 1 lsb off offset 3 lsb gain_e rr gain error 0.8 % a dc in differential m ode v abs_diff absolute voltages & common mode voltage in differential mode at each input 0 vdd v v fs_diff01 full swing input for differential signals gain x1 - 500 500 mv v fs_diff10 gain x10 - 50 50 mv adc in single ended m ode v mid_se mid code input voltage in single ended mode 0.5 v v in_se00 input voltage in single ended mode 0 vdd v v fs_se01 full swing input for single ended signals gain x1 0 1 v temperature s ensor t rng temperature range - 40 85 c t err_cal temperature error +/ - 2 c
9 / 15 www.onsemi.com ax - sigfox - mods/d command interface serial parameters: 9 600, 8, n, 1 the ax - sigfox modules use the uart (pins uart _ tx, uart _ rx) to communicate with a host and use a bitrate of 9600 baud , no parity, 8 data bits and one stop bit. power modes state diagram standby mode after power - up and after finishing a sigfox transmission , the ax - sigfox modules enter standby mode. in standb y mode, ax - sigfox modules listen on the uart for commands from the host. also, oob frames are transmitted whenever the oob timer fires. to conserve power, the ax - sigfox modules can be put into sleep mode or turned off (deep sleep mode) completely. sleep mo de the command at$p=1 is used to put ax - sigfox modules into s leep mode . in this mode, only the wakeup timer for out - of - band messages is still running. to wake up the ax - sigfox module from sleep mode , toggle the uart_rx pin , e.g. by sending a break (break is an rs232 framing violation, i.e. at least 10 bit durations low) . when an out of band (oob) message is due , ax - sigfox modules a utomatically wake up to t ransmit the message, and then return to s leep mode. it is s trongly recommended to put ax - sigfo x modules into sleep mode when they are not being used. deep sleep mode in deep sleep mode , the ax- sigfox modules are completely turned off. deep sleep mode can be activated with the command at$p=2 . to wake- up from deep sleep mode the pin gpio9 is pulled to gnd. when using deep sleep mode , two things should be kept in mind: everything is turned off, timers are not running at all and all settings are lost (use at$wr to save settings to flash before entering deep sleep mode ). out - of - band messages will there fore not be se nt . the pins states are frozen in deep sleep mode . the user must ensure that this will not result in conditions at the module boundary that draw a lot of current.
10 / 15 www.onsemi.com ax - sigfox - mods/d at commands numerical syntax hexdigit ::= [0- 9a- fa- f] hexnum ::= ?0x? hexdigit+ decnum ::= ?0? | [1- 9] [0- 9]* octnum ::= ?0? [0- 7]+ binnum ::= ?0b? [01]+ bit ::= [01] optnum ::= ? - 1? frame ::= (hexdigit hexdigit)+ uint ::= hexnum | decnum | octnum | binnum uint_opt ::= uint | optnum command syntax a command starts with ?at? ( note that everything is case sensitive!), continues with the actual command followed by parameters (if any) and ends with any kind of whitespace (space, tab, newline etc.) if incorrect syntax is detected (?parsing error?) all inp ut is ignored up until the next whitespace character. also note that any number can be entered in any format (hexadecimal, decimal, octal and binary) by adding the corresponding prefix (?0x?, ?0?, ?0b?). the only exception is the 'send frame' command ( at$sf ) which expects a list of hexadecimal digits without any prefix. return codes a successful command execution is indicated by sending ?ok?. if a command returns a value (e.g. by querying a register) only the value is returned. examples bold text is sen t to the ax - s igfox module . here, we execute command ?i? to query some general information: at$i=0 axsem at command interface this sends a sigfox frame containing { 0xaa : 0xbb : 0x12 : 0x34 } without waiting for a response telegram: at$sf=aabb1234 ok this sends a sigfox frame containing { 0x 00 : 0x 11 : 0x 22 : 0x 33 : 0x44 } , then waits for a downlink response telegram , which in this example contains { 0xaa : 0xbb : 0xcc : 0xdd } . at$sf=0011223344,1 ok rx=aa bb cc dd the ?cb? command sends out a contin uous pattern of bits, in this case 0xaa = 0b10101010: at$cb=0xaa,1 ok this transitions the device into sleep mode. out - of - band transmissions will still be triggered. the uart is powered down. the module can be woken up b y a low level on the uart , i.e. by sending break: at$p=1 ok
11 / 15 www.onsemi.com ax - sigfox - mods/d commands command name description at dummy command just returns 'ok' and does nothing else. can be used to check communication. at$sb = bit[,bit] send b it send a bit status (0 or 1). optional bit flag indicates if the ax - sigfox module should receive a downlink frame. at$sf = frame [ , bit ] send f rame send payload data, 1 to 12 bytes. optional bit flag indicates if ax - sigfox module should receive a downlink frame . at$so manually send out of band message send the out - of - band message. ats uint ? get r egister query a specific configuration register?s value. see chapter ?registers? for a list of registers. ats uint = uint set r egister change a configuration register. at$if = uint set tx f requency set the output carrier macro channel for sigfox frames. at$if? get tx f requency get the currently chosen tx frequency. at$dr = uint set rx f requency set the reception carrier macro channel for sigfox frames. at$cw = uint , bit [,uint_opt] continuous wave to run emission tests for sigfox certification it is necessary to send a continuous wave, i.e. just the base frequency without any modulation. parameters: name range description default frequency 800000000 ? 999999999, 0 continuous wave frequency in hz. use 868130000 for sigfox or 0 to keep previous frequency. - mode 0, 1 enable or disable carrier wave. - power 0 - 14 dbm of signal 14 at$cb = uint_opt, bit test mode: tx constant byte for emission testing it is useful to send a specific bit pattern. the first parameter specifies the byte to send. use ? - 1? for a (pseudo - ) random pattern. parameters: name range description default pattern 0 - 255, - 1 byte to send. use ? - 1? for a (pseudo - ) random pattern - mode 0, 1 enable or disable pattern test mode. - at$t? get t emperature measure internal temperature and return it in 1/10 th of a degree celsius. at$v? get voltages return current voltage and voltage measured during the last transmission in mv .
12 / 15 www.onsemi.com ax - sigfox - mods/d command name description at$i= uint information display various product information: 0: software name & version example response: ax - sigfox 1.0.6 - etsi 1: contact details example response: support @axsem.com 2: silicon revision lower byte example response: 8f 3: silicon revision upper byte example response: 00 4: major firmware version example response: 1 5: minor firmware version example response: 0 6: firmware revision example response: 3 7: firmware variant (fr equency band etc. (eu/us)) example response: etsi 8: firmware vcs version example response: v1.0.2 - 36 9: sigfox library version example response: dl0 - 1.4 10: device id example response: 00012345 11: pac example response: 0123456789abcdef at$p = uint set p ower m ode to conserve power, the ax - sigfox module can be put to sleep manually. depending on power mode, you will be responsible for waking up the ax - sigfox module again! 0: software reset (settings will be reset to values in the flash) 1: sleep (send a break to wake up) 2: deepsleep (toggle gpio9 or reset _n pin to wake up; the ax - sigfox module is not running and all settings will be reset!) at$wr save c onfig write all settings to flash (rx/tx frequencies, registers) so that they survive reset/ deepsleep or loss of power. use at$p=0 to reset the ax- sigfox module and load settings from flash. at:p n ? get gpio pin return the setting of the gpio p in n ; n can range from 0 to 9. a character string is returned describing the mode of the pin, followed by the actual value. if the pin is configured as analog pin, then the voltage (range 0...1 v) is returned. the mode characters have the following meaning : mode description 0 pin drives low 1 pin drives high z pin is high impedance input u pin is input with pull - up a pin is analog input (gpio pin 0...3 only) t pin is driven by clock or dac (gpio pin 0 and 4 only) the default mode after exiting reset is u on all gpio pins.
13 / 15 www.onsemi.com ax - sigfox - mods/d command name description at:p n =? get gpio p in r ange print a list of possible modes for a pin . the table below lists the response. pin modes p0 0,1,z,u,a,t p1 0,1,z,u,a p2 0,1,z,u,a p3 0,1,z,u,a p4 0,1,z,u,t p5 0,1,z,u p6 0,1,z,u p7 0,1,z,u p8 0,1,z,u p9 0,1,z,u at:p n = mode set gpio p in set the gpio pin mode . for a list of the modes see the command at:p n ? at:adc p n [ - p n [ (1v|10v)]]? get gpio p in a nalog voltage measure the voltage applied to a gpio pin. the command also allows measurement of the voltage difference across two gpio pins. in differential mode, the full scale range may also be specified as 1 v or 10 v. note however that the pin input voltages must not exceed the range 0..vdd. the command returns the result as fraction of the full scale range (1v if none is specified). the gpio pins referenced should be initialized to analog mode before issuing this command. at:spi [(a|b|c|d)]= bytes spi t ransaction this command clocks out bytes on the spi port. the clock frequency is 312.5khz. the command returns the bytes read on miso during output. optionally the clocking mode may be specified (default is a) : mode clock inversion clock phase a normal normal b normal alternate c inverted normal d inverted alternate note that sel, if needed, is not generated by this command, and must instead be driven using standard gpio commands (at:pn=0|1). at:clk = freq,reffreq set c lock g enerator output a square wave on the pin(s) set to t mode . the frequency of the square wave is ???? 2 16 ??????? . possible values for reffreq are 20000000, 10000000, 5000000, 2500000, 1250000, 625000, 312500, 156250 . possible values for freq are 0 ?65535.
14 / 15 www.onsemi.com ax - sigfox - mods/d command name description at:clk=off turn off clock generator switch off the clock generator. at:clk? get c lock g enerator return the settings of the clock generator. two numbers are returned, freq and reffreq. at:dac = value set ? dac output a ? dac value on the pin(s) set to t mode . parameter value may be in the range ? 32768..32767. the average output voltage is ? 1 2 ???? ? 2 17 ? ??? . a n external low pass filter is needed to get smooth output voltages. the modulation frequency is 20 mhz. a possible low pass filter choice is a simpl e rc low pass filter with r=10k ? and c=1 ? f . at:dac=off turn off ? dac switch off the dac . at:dac? get ? dac return the dac value . registers number name description default range unit 300 out of band period ax - sigfox module s ends periodic static messages to indicate that they are alive. set to 0 to disable. 24 0 - 24 hours 302 power level the output power of the radio. 14 0 - 14 dbm
15 / 15 www.onsemi.com ax - sigfox - mods/d part numbers protocol ministamp antstamp sigfox 868 mhz ax - sf10 - min21 - 868 ax - sf10 - ant 21 - 868 part versions part number at$i=0 at$i=2 at$i=3 ax - sf10 - min i21 - 868 ax - sigfox 1.0.6 - etsi 0x8f 0x51 ax - sf10 - ant 21 - 868 ax - sigfox 1.0.6 - etsi 0x8f 0x51 trademarks sigfox and sigfox ready are registered trad emarks of sigfox sarl. on semiconductor and the on logo are registered trademarks of semiconductor components industries, llc (scillc) or its subsidiaries in the united states and/or ot her countries. scillc owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual propert y. a listing of scillc?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent - marking.pdf. scillc reserves the right to make changes without further notice to any products herein. scillc makes no warrant y, representation or guarantee r egarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation specia l, consequential or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating para meters, including ?typical s? must be validated for each customer application by customer?s technical experts. scillc does not convey any license under its patent rights nor the righ ts of others. scillc products are not designed, intended, or authorized for use as components in syst ems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a situation where personal injury or death may occur. should bu yer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and di stributors harmless against all claims, costs, damages, and expenses , and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture of th e part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. publication ordering information literature fulfillment: literature distribution center for on semiconductor 19521 e. 32nd pkwy, aurora, colorado 80011 usa phone : 303 - 675- 2175 or 800 - 344 - 3860 toll free usa/canada fax: 303- 675- 2176 or 800 - 344 - 3867 toll free usa/canada email : orderlit@onsemi.com n. american technical support : 800 - 282 - 9855 to ll free usa/canada. europe, middle east and africa technical support : phone: 421 33 790 2910 japan customer focus center phone: 81 - 3 - 5817 - 1050 on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your local sales representative

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