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? semiconductor components industries, llc, 2017 september, 2017 ? rev. 0 1 publication order number: ax?sip?sfeu/d AX-SIP-SFEU, AX-SIP-SFEU-api ultra-low power, ultra compact, at command / api controlled, sigfox verified transceiver sip for up-link and down-link overview circuit description ax?sip?sfeu and ax?sip?sfeu?api are ultra?low power, ultra compact system?in?package (sip) solutions for a node on the sigfox network with both up?and down?link functionality. with a footprint of just 7 mm 9 mm and conformal shielding, the ax?sip?sfeu sip, contains all the necessary components and firmware for transmit and receive operation on the european sigfox network. no additional passive components or reference frequency providing parts are required on the customer?s pcb. a single?ended 50 antenna port is provided. the ax?sip?sfeu connects to the customer product using a logic level rs232 uart. at commands are used to send frames and configure radio parameters. the ax?sip?sfeu?api variant is intended for customers wishing to write their own application software based on the ax?sf?lib?1?gevk library. features functionality and ecosystem ? single package, zero external components, full sigfox up?link and down?link functionality controlled by at commands or api ? the ax?sip?sfeu and ax?sip?sfeu?api sips are part of a whole development and product ecosystem available from on semiconductor for any sigfox requirement. other parts of the ecosystem include ? ready to go development kit dvk?sip?sfeu?[api]?1?gevk including a 2 year sigfox subscription ? sigfox ? verified general features ? sip44 9 mm 7 mm package ? conformal shielding ? supply range 1.8 v* ? 3.6 v ? ?30 c to 85 c ? temperature sensor *the device is operational from 1.8 v to 3.6 v. however, a supply voltage below 2.0 v is considered an extreme condition. ? supply voltage measurements ? 15 gpio pins ? 6 gpio pins with selectable voltage measure functionality, differential (1 v or 10 v range) or single ended (1 v range) with 10 bit resolution ? 2 gpio pins with selectable sigma delta dac output functionality ? 2 gpio pins with selectable output clock ? 3 gpio pins selectable as spi master interface ? integrated rx/tx switching with single?ended 50 antenna pin power consumption ? ultra?low power consumption: ? charge required to send a sigfox oob packet at 14 dbm output power: 0.26 c ? deep sleep mode current: 100 na ? sleep mode current: 1.3 a ? standby mode current: 0.55 ma ? continuous radio rx?mode at 869.525 mhz: 14 ma ? continuous radio tx?mode at 868.130 mhz: 18 ma @ 0 dbm 45 ma @ 14 dbm high performance narrow?band sigfox rf transceiver ? receiver ? carrier frequency 869.525 mhz ? data?rate 600 bps fsk ? sensitivity ?126 dbm @ 600 bps, 869.525 mhz, gfsk ? 0 dbm maximum input power ? transmitter ? carrier frequency 868.13 mhz ? data?rate 100 bps psk ? high efficiency, high linearity integrated power amplifier ? maximum output power 14 dbm ? power level programmable in 1 dbm steps applications ? sigfox networks up?link and down?link www. onsemi.com
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 2 block diagram figure 1. functional block diagram of the ax?sip?sfeu / ax?sip?sfeu?api rx/tx switch and antenna interface transmit communication controller cpu program memory (flash) sigfox identity (id, pac) sigfox compliant ram power mode adc gpio uart rf synthesis dac ax?sip?sfeu / ax?sip?sfeu?api receive ant uartrx uarttx gpio[14:0] vdd_io gnd dedicated status outputs radio_led cpu_led tx_led rx_led reset_n application (ax?sfeu only) control
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 3 table 1. pin function descriptions symbol pin(s) type description gnd 1 p ground gnd 2 p ground ant 3 a single?ended 50 antenna input/output gnd 4 p ground nc 5 p do not connect gnd 6 p ground nc 7 p do not connect nc 8 p do not connect nc 9 n do not connect gpio11 10 i/o/pu general purpose io gpio10 11 i/o/pu general purpose io gpio8 12 i/o/pu general purpose io gpio7 13 i/o/pu general purpose io, selectable spi functionality (miso) gpio6 14 i/o/pu general purpose io, selectable spi functionality (mosi) gpio5 15 i/o/pu general purpose io, selectable spi functionality (sck) gpio4 16 i/o/pu general purpose io, selectable dac functionality, selectable clock functionality cpu_led 17 o cpu activity indicator radio_led 18 o radio activity indicator gpio9 19 i/o/pu general purpose io, wakeup from deep sleep uarttx 20 o uart transmit uartrx 21 i/pu uart receive rx_led 22 o receive activity indicator tx_led 23 o transmit activity indicator nc 24 pd do not connect reset_n 25 i/pu optional reset pin. internal pull ? up resistor is permanently enabled, nevertheless it is recommended to connect this pin to vdd_io if it is not used. gnd 26 p ground vdd_io 27 p unregulated power supply gpio0 28 i/o/a/pu general purpose io, selectable adc functionality, selectable dac functionality, selectable clock functionality gpio1 29 i/o/a/pu general purpose io, selectable adc functionality gpio2 30 i/o/a/pu general purpose io, selectable adc functionality nc 31 n do not connect nc 32 n do not connect gpio3 33 i/o/a/pu general purpose io, selectable adc functionality gpio12 34 i/o/a/pu general purpose io, selectable adc functionality gpio13 35 i/o/a/pu general purpose io, selectable adc functionality gpio14 36 i/o/pu general purpose io nc 37 n do not connect nc 38 n do not connect gnd center pads p ground on 6 center pads of sip44, must be connected
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 4 a = analog input or input/output i = digital input signal o = digital output signal pu = pull?up i/o = digital input/output signal n = not to be connected p = power or ground pd = pull?down all digital inputs are schmitt trigger inputs, digital input and output levels are lvcmos/lvttl compatible. pins gpio[3:0] and gpio[13:12] must not be driven above vdd_io, all other digital inputs are 5 v tolerant. all gpio pins and uartrx start up as input with pull?up. for explanations on how to use the gpio pins, see chapter ?at commands?. 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 t = pin is driven by clock or dac table 2. pin possible gpio modes gpio0 0, 1, z, u, a, t gpio1 0, 1, z, u, a gpio2 0, 1, z, u, a gpio3 0, 1, z, u, a gpio4 0, 1, z, u, t gpio5 0, 1, z, u gpio6 0, 1, z, u gpio7 0, 1, z, u gpio8 0, 1, z, u gpio9 0, 1, z, u gpio10 0, 1, z, u gpio11 0, 1, z, u gpio12 0, 1, z, u, a gpio13 0, 1, z, u, a gpio14 0, 1, z, u pinout drawing figure 2. pinout drawing (top view) gnd gnd ant gnd gnd nc nc nc nc gpio11 gpio10 gpio8 gpio7 gpio6 gpio5 gpio4 cpuled radioled gpio9 vio gnd reset_n nc txled rxled uartrx uarttx gpio0 gpio1 gpio2 nc nc gpio3 gpio12 gpio13 gpio14 nc nc 38 9 37 10 36 11 35 12 34 13 33 14 32 15 31 16 30 17 29 18 28 19 1 27 2 26 3 25 4 24 5 23 6 22 7 21 8 20 ax?sip?sfeu / ax?sip?sfeu?api
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 5 specifications table 3. absolute maximum ratings symbol description condition min max units vdd_io supply voltage ? 0.5 5.5 v idd supply current 200 ma p tot total power consumption 800 mw p i absolute maximum input power at receiver input ant pin in rx mode 10 dbm i i1 dc current into any pin except ant ?10 10 ma i i2 dc current into pin ant ?100 100 ma i o output current 40 ma v ia input voltage ant pin ?0.5 5.5 v input voltage digital pins ?0.5 5.5 v v es electrostatic handling hbm ?2000 2000 v t amb operating temperature ? 30 85 c t stg storage temperature ?30 85 c t j junction temperature 150 c stresses exceeding those listed in the maximum ratings table may damage the device. if any of these limits are exceeded, device function ality should not be assumed, damage may occur and reliability may be affected. 1. exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 6 dc characteristics table 4. supplies (conditions for all current and charge values unless otherwise specified are for the dvk?sip?sfeu?1?gvk hardware configuration. ) symbol description condition min typ max units t amb operational ambient temperature ?30 27 85 c vdd io i/o and voltage regulator supply voltage 1.8* 3.0 3.6 v vdd io_r1 i/o voltage ramp for reset activation (note 2) ramp starts at vdd_io 0.1 v 0.1 v/ms vdd io_r2 i/o voltage ramp for reset activation (note 2) ramp starts at 0.1 v < vdd_io < 0.7 v 3.3 v/ms i ds deep sleep mode current at$p = 2 100 na i slp sleep mode current at$p = 1 1.3 a i stdby standby mode current (note 4) 0.55 ma i rx_cont current consumption continuous rx at$se 14 ma q sfx_oob_0 charge to send a sigfox out of band message, 0 dbm at$s0 0.11 c q sfx_bit_0 charge to send a bit, 0 dbm at$sb = 0 0.07 c q sfx_bitdl_0 charge to send a bit with downlink receive, 0 dbm at$sb = 0,1 0.31 c q sfx_lfr_0 charge to send the longest possible sigfox frame (12 byte), 0dbm at$sf = 00112233445566778899aabb 0.13 c q sfx_lfrdl_0 charge to send the longest possible sigfox frame (12 byte) with downlink receive, 0 dbm at$sf = 00112233445566778899aabb,1 0.35 c q sfx_oob_14 charge to send a sigfox out of band message, 14 dbm at$s0 0.26 c q sfx_bit_14 charge to send a bit, 14 dbm at$sb = 0 0.17 c q sfx_bitdl_14 charge to send a bit with downlink receive, 14 dbm at$sb = 0,1 0.45 c q sfx_lfr_14 charge to send the longest possible sigfox frame (12 byte), 14 dbm at$sf = 00112233445566778899aabb 0.30 c q sfx_lfrdl_14 charge to send the longest possible sigfox frame (12 byte) with downlink receive, 14 dbm at$sf = 00112233445566778899aabb,1 0.58 c i txmod0avg modulated transmitter current (note 3) pout = 0 dbm; average 18 ma i txmod14avg modulated transmitter current (note 3) pout = 14 dbm; average 45 ma *the device is operational from 1.8 v to 3.6 v. however, a supply voltage below 2.0 v is considered an extreme condition and op eration can lead to reduced output power and increased spurious emission. 2. if vdd_io ramps cannot be guaranteed, an external reset circuit is recommended, see the ax8052 application note: power on res et 3. the output power of the ax?sip?sfeu / ax?sip?sfeu?api can be programmed in 1 db steps from 0 dbm ? 14 dbm. current consumptio n values are given for a matching network that is optimized for 14 dbm output. 0 dbm transmission with typically 10 ma can be achieved w ith other networks that are optimized for 0 dbm operation. 4. 20 mhz fast rc oscillator, voltage conditioning and supervisory circuit running.
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 7 typical current waveform figure 3. typical current waveform for a maximum length frame with downlink receive at 14 dbm output powe r battery life examples scenario 1: ? cr2032 coin cell battery ? one oob frame transmitter per day at pout = 0 dbm ? device in sleep ? neglecting battery self?discharge cr2032 capacity 225 mah 3600 s/h 810 c sleep charge per day 1.3 a 86400 s 0.11 c/day oob frame transmission 0.11 c/day total charge consumption 0.22 c/day battery life 10 years scenario 2: ? 2 aaa alkaline batteries in series ? one oob frame transmitter per day at pout = 14 dbm ? four maximum length frames with downlink receive per day at pout = 14 dbm ? device in sleep ? neglecting battery self?discharge 2 aaa alkaline capacity 1500 mah 3600 s/h 5400 c sleep charge per day 1.3 a 86400 s 0.11 c/day oob frame transmission 0.26 c/day frame transmission with downlink 4 0.58 c/day 2.32 c/day total charge consumption 2.69 c/day battery life 5.5 years
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 8 table 5. logic symbol description condition min typ max units digital inputs v t+ schmitt trigger low to high threshold point vdd_io = 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] and gpio[13:12] ?0.5 vdd_io v v ipbc input voltage range, gpio[9:4], uartrx ?0.5 5.5 v i l input leakage current ?10 10 a r pu programmable pull ? up resistance 65 k digital outputs i oh output current, high gpio[14:0], uarttx, txled, rxled, txled, cpuled v oh = 2.4 v 8 ma i ol output current, low gpio[14:0], uarttx, txled, rxled, txled, cpuled v ol = 0.4 v 8 ma i oz tri ? state output leakage current ?10 10 a ac characteristics table 6. transmitter (conditions for transmitter specifications unless otherwise specified are for dvk?sip?sfeu?1?gvk hardware configuration and at 868.130 mhz frequency.) symbol description condition min typ max units sbr signal bit rate 100 bps ptx min lowest transmitter output power at$cw=868130000,1,0 0 dbm ptx max highest transmitter output power at$cw=868130000,1,14 14 dbm ptx step programming step size output power 1 db dtx temp transmitter power variation vs. temperature ?30 c to +85 c 0.8 db dtx vdd transmitter power variation vs. vdd_io 1.9 to 3.6 v 0.5 db ptx harm2 emission @ 2 nd harmonic ?69 dbc ptx harm3 emission @ 3 rd harmonic ?89 ptx harm4 emission @ 4 th harmonic ?91
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 9 figure 4. typical spectrum with harmonics at 14 dbm output power table 7. receiver (conditions for transmitter specifications unless otherwise specified are for dvk?sip?sfeu?1?gvk hardware configuration and at 869.525 mhz frequency.) symbol description condition min typ max units sbr signal bit rate 600 bps is ber868 sensitivity evaluated at per 0.1. at command used: at$se ?126 dbm blk 2m?868 blocking level at 2 mhz offset evaluated at ber > 10 ?3 . wanted signal is +3 db above the typical sensitivity, the blocker signal is cw. at command used: at$pn=4,5. ?52 dbm blk 10m?868 blocking level at 10 mhz offset evaluated at ber > 10 ?3 . wanted signal is +3 db above the typical sensitivity, the blocker signal is cw. at command used: at$pn=4,5. ?31 dbm
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 10 table 8. adc/temperature sensor symbol description condition min typ max units adcres adc resolution 10 bits 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 nonlinearity 1 lsb off offset 3 lsb gain_err gain error 0.8 % adc in differential mode v abs_diff absolute voltages & common mode voltage in differential mode at each input 0 vdd_io v v fs_diff01 full swing input for differential signals gain 1 ?500 500 mv v fs_diff10 gain 10 ?50 50 mv adc in single ended mode 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_io v v fs_se01 full swing input for single ended signals gain 1 0 1 v temperature sensor t rng temperature range at$t? ?30 85 c t err_cal temperature error at$t? ?2 2 c command interface general information the chapter ?command interface? is a documentation of the at?command set for devices which do not have an api?interface. to see whether the device is capable of receiving a t?commands, please refer to the table ?device versions?. if the device has been shipped with the api?interface, please refer to the sw manual and ?apiexample? code delivered with ax?sf?lib?1?gevk for an introduction on how to setup a project and how to use the api?interface. serial parameters: 9600, 8, n, 1 the ax?sip?sfeu uses the uart (pins uarttx, uartrx) to communicate with a host and uses a bitrate of 9600 baud , no parity, 8 data bits and one stop bit. power modes
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 11 standby after power?up and after finishing a sigfox transmission, ax?sip?sfeu enters standby mode. in standby mode, ax?sip?sfeu listens on the uart for commands from the host. also, oob frames are transmitted whenever the oob timer fires. to conserve power, the ax?sip?sfeu can be put into sleep or turned off (deep sleep) completely. sleep the command at$p=1 is used to put the ax?sip?sfeu into sleep mode. in this mode, only the wakeup timer for out?of?band messages is still running. to wake the ax?sip?sfeu up from sleep mode toggle the serial uartrx pin, e.g. by sending a break (break is an rs232 framing violation, i.e. at least 10 bit durations low). when an out of band (oob) message is due, ax?sip?sfeu automatically wakes up to transmit the message, and then returns to sleep mode. deep sleep in deep sleep mode, the ax?sip?sfeu is completely turned off and only draws negligible leakage current. deep sleep mode can be activated with at$p=2 . to wake?up from deep sleep mode, gpio9 is pulled to gnd. when using deep sleep mode, keep two things in mind: everything is turned off, timers are not running at all and all settings will be lost (use at$wr to save settings to flash before entering deep sleep mode). out?of?band messages will therefore not be sent. the pins states are frozen in deep sleep mode. the user must ensure that this will not result in condition which would draw a lot of current. at commands numerical syntax hexdigit ::= [0?9a?fa?f] hexnum ::= ?0x? hexdigit+ decnum ::= ?0? | [1?9] [0?9]* octnum ::= ?0? [0?7]+ binnum ::= ?0b? [01]+ bit ::= [01] optnum ::= ??1? frame ::= (hexdigit hexdigit)+ uint ::= hexnum | decnum | octnum | binnum uint_opt ::= uint | optnum command syntax a command starts with ?at? (everything is case sensitive!), continues with the actual command followed by parameters (if any) and ends with any kind of whitespace (space, tab, newline etc.) if incorrect syntax is detected (?parsing error?) all input is ignored up until the next whitespace character. also note that any number can be entered in any format (hexadecimal, decimal, octal and binary) by adding the corresponding prefix (?0x?, ?0?, ?0b?). the only exception is the ?send frame? command ( at$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 sent to ax?sip?sfeu. at$i=0 ax?sigfox 1.1?rcz1 here, we execute command ?i? to query some general information. at$sf=aabb1234 ok this sends a sigfox frame containing {0xaa : 0xbb : 0x12 : 0x34} without waiting for a response telegram. at$sf=0011223344,1 ok rx=aa bb cc dd this sends a sigfox frame containing {0x00 : 0x11 : 0x22 : 0x33 : 0x44}, then waits for a downlink response telegram, which in this example contains {0xaa : 0xbb : 0xcc : 0xdd}. at$cb=0xaa,1 ok the ?cb? command sends out a continuous pattern of bits, in this case 0xaa = 0b10101010. at$p=1 ok this transitions the device into sleep mode. out?of?band transmissions will still be triggered. the uart is powered down. the device can be woken up by a low level on the uart signal, i.e. by sending break.
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 12 table 9. commands command name description at dummy command just returns ?ok? and does nothing else. can be used to check communication. at$sb=bit[,bit] send bit send a bit status (0 or 1). optional bit flag indicates if ax?sip?sfeu should receive a downlink frame. at$sf=frame[,bit] send frame send payload data, 1 to 12 bytes. optional bit flag indicates if ax?sip?sfeu should receive a downlink frame. at$so manually send out of band message send the out ? of ? band message. at$tr? get the transmit repeat returns the number of transmit repeats. default: 2 at$tr=? get transmit repeat range returns the allowed range of transmit repeats. at$tr=uint set transmit repeat sets the transmit repeat, sets only for transmit with downlink frame . atsuint? get register query a specific configuration register?s value. see chapter ?registers? for a list of registers. atsuint=uint set register change a configuration register. atsuint=? get register range returns the allowed range of the register values. at$if=uint set tx frequency set the output carrier macro channel for sigfox frames. at$if? get tx frequency get the currently chosen tx frequency. at$dr=uint set rx frequency set the reception carrier macro channel for sigfox frames. at$dr? get rx frequency get the currently chosen rx frequency. at$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 frequency 800000000 ? continuous wave frequency in hz. 999999999, 0 use 868130000 for sigfox or 0 to keep previous frequency. mode 0, 1 enable or disable carrier wave. power 0 ? 14 dbm of signal | default: 14 at$cb=uint_opt,bit test mode: tx constant byte for emission testing it is useful to send a specific bit pattern. the first parameter specifies the byte to send. use ? ? 1? for a (pseudo ? )random pattern. parameters: name range description pattern 0 ? 255, ? 1 byte to send. use ? ? 1? for a (pseudo ? )random pattern. mode 0, 1 enable or disable pattern test mode. at$t? get temperature measure internal temperature and return it in 1/10 th of a degree celsius. at$v? get voltages return current voltage and voltage measured during the last transmission in mv.
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 13 table 9. commands (continued) command description name at$i=uint information display various product information: 0: software name & version example response: ax ? sigfox 1.1?rcz1 1: contact details example response: support@axsem.com 2: silicon revision lower byte example response: 90 3: silicon revision upper byte example response: 51 4: major firmware version example response: 1 5: minor firmware version example response: 1 7: firmware variant (frequency band etc. (eu/us)) example response: rcz1 8: firmware vcs version example response: 0 9: sigfox library version example response: udl1 ? 1.8.9 10: device id example response: 00012345 11: pac example response: 0123456789abcdef at$p=uint set power mode to conserve power, the ax sip sfeu can be put to sleep manually. depending on power mode, you will be responsible for waking up the ax?sip?sfeu again! 0: software reset (settings will be reset to values in flash) 1: sleep (send a break to wake up) 2: deep sleep (toggle gpio9 or reset_n pin to wake up; the ax ? sfeu is not running and all settings will be reset!) at$wr save config write all settings to flash (rx/tx frequencies, registers) so they survive reset/deep sleep or loss of power. use at$p=0 to reset the ax?sip?sfeu and load settings from flash. at:pn? get gpio pin return the setting of the gpio pin n ; n can range from 0 to 14. 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 and 12 13 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.
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 14 table 9. commands (continued) command description name at:pn=? get gpio pin range 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 p10 0, 1, z, u p11 0, 1, z, u p12 0, 1, z, u, a p13 0, 1, z, u, a p14 0, 1, z, u at:pn=mode set gpio pin set the gpio pin mode. for a list of the modes see the command at:pn? at:adc pn[ ? pn[ (1v|10v)]]? get gpio pin analog 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_io. the command returns the result as fraction of the full scale range (1 v 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 transaction this command clocks out bytes on the spi port. the clock frequency is 312.5 khz. 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 d7 d7 d6 d6 d5 d5 d4 d4 d3 d3 d2 d2 d1 d1 d0 d0 sel (gpiox) mosi miso sck a b c d 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 clock generator output a square wave on the pin(s) set to t mode. the frequency of the square wave is (freq / 2 16 ) reffreq. possible values for reffreq are 20000000, 10000000, 5000000, 2500000, 1250000, 625000, 312500, 156250. possible values for freq are 0 65535. at:clk=off turn off clock generator switch off the clock generator at:clk? get clock generator 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 + value / 2 17 ) vdd. an 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 simple rc low pass filter with r = 10 k and c = 1 f.
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 15 table 9. commands (continued) command description name at:dac=off turn off dac switch off the dac at:dac? get dac return the dac value at$tm=mode,config activates the sigfox testmode available test modes: 0. tx bpsk send only bpsk with synchro bit + synchro frame + pn sequence: no hopping centered on the tx_frequency. config bits 0 to 6 define the number of repetitions. bit 7 of config defines if a delay is applied or not between the frames in the loop 1. tx protocol: tx mode with full protocol with sigfox key: send sigfox protocol frames with initiate downlink flag = true. config defines the number of repetitions. 2. rx protocol: this mode tests the complete downlink protocol in downlink only. config defines the number of repetitions. 3. rx gfsk: rx mode with known pattern with sb + sf + pattern on rx_frequency (internal comparison with received frame ? known pattern = aa aa b2 27 1f 20 41 84 32 68 c5 ba ae 79 e7 f6 dd 9b. config defines the number of repetitions. 4. rx sensitivity: does uplink + downlink frame with sigfox key and specific timings. this test is specific to sigfox?s test equipment & software. 5. tx synthesis: does one uplink frame on each sigfox channel to measure frequency synthesis step . at$se starts at$tm = 3,255 indefinitely convenience command for sensitivity tests at$sl[=frame] send local loop sends a local loop frame with optional payload of 1 to 12 bytes. default payload: 0x84, 0x32, 0x68, 0xc5, 0xba, 0x53, 0xae, 0x79, 0xe7, 0xf6, 0xdd, 0x9b. at$rl receive local loop starts listening for a local loop. at$tp=repetitions transient power measurements mode used for transmitter transient power measurements. the command switches the transmitter on and off. during on state (pseudo ) random bit pattern is send. repetitions is the number of performed measurements, acceptable range is 1?255. at$pn=mode,repetitions send & receive pn9 bitstream for ber measurements available modes: 0: send pn9 bit stream. repetitions = 1 is required to start sending. repetitions = 0 stops sending 3: receive pn9 bit stream, calculate ber with 3 digits precision 4: receive pn9 bit stream, calculate ber with 4 digits precision 5: receive pn9 bit stream, calculate ber with 5 digits precision mode = 3?5 receives the pn9 bitstream and decodes it into an actual ber measurement. reports the ber for each repetition. repetitions is the number of performed measurements, acceptable range is 1?255. higher precision result takes longer time to compute. pn9 is 9?bit pseudo random binary sequence. table 10. registers number name description default range units 300 out of band period ax?sip?sfeu sends 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 410 encryption key configuration set to zero for normal operation. set to one for use with the sigfox network emulator (snek). 0 0?1 0: private key 1: public key
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 16 application information typical application diagrams typical ax?sip?sfeu / ax?sip?sfeu?api application diagram figure 5. typical application diagram
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 17 sip44 package information figure 6. sip44 9x7, 0.65p
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 18 sip44 recommended pad layout 1. pcb land and solder masking recommendations are shown in figure 7. figure 7. pcb land and solder mask recommendations a = clearance from pcb thermal pad to solder mask opening, 0.0635 mm minimum b = clearance from edge of pcb thermal pad to pcb land, 0.2 mm minimum c = clearance from pcb land edge to solder mask opening to be as tight as possible to ensure that some solder mask remains between pcb pads d = pcb land length = sip solder pad length + 0.1 mm e = pcb land width = sip solder pad width + 0.1 mm f = clearance from solder mask opening to the edge of the package, 0.1 mm minimum to avoid shorts to the package metal shielding cd e b a f solder mask pcb thermal pad pcb land solder mask opening 2. thermal vias should be used around the pcb thermal pads (middle ground pads) to improve thermal conductivity from the device to a copper ground plane area on the reverse side of the printed circuit board. the number of vias depends on the package thermal requirements, as determined by thermal simulation or actual testing. 3. increasing the number of vias through the printed circuit board will improve the thermal conductivity to the reverse side ground plane and external heat sink. in general, adding more metal through the pc board under the sip will improve operational heat transfer, but will require careful attention to uniform heating of the board during assembly. assembly process stencil design & solder paste application 1. stainless steel stencils are recommended for solder paste application. 2. a stencil thickness of 0.125?0.150 mm (5?6 mils) is recommended for screening. 3. for the pcb thermal pads, solder paste should be printed on the pcb by designing a stencil with an array of 6 openings for each of the 6 thermal/gnd pads. 4. the aperture opening for the signal pads should be between 50?80% of the sip pad area as shown in figure 8. 5. optionally, for better solder paste release, the aperture walls should be trapezoidal and the corners rounded. 6. the fine pitch of the sip leads requires accurate alignment of the stencil and the printed circuit board. the stencil and printed circuit assembly should be aligned to within + 1 mil prior to application of the solder paste. 7. no?clean flux is recommended since flux from underneath the thermal pad will be difficult to clean if water?soluble flux is used. figure 8. solder paste application on pins minimum 50% coverage 62% coverage maximum 80% coverage
ax?sip?sfeu, ax?sip?sfeu?api www. onsemi.com 19 life support applications this product is not designed for use in life support appliances, devices or in systems where malfunction of this product can reasonably be expected to result in personal injury. on semiconductor customers using or selling this product for use in such applications do so at their own risk and agree to fully indemnify on semiconductor for any damages resulting from such improper use or sale. device information the following device information can be queried using the a t?commands a t$i=4, at$i=5 for the app version and at$i=2, at$i=3 for the chip version. table 11. device versions product part number app version sip version [0] [1] [0] [1] ax?sip?sfeu ax?sip?sfeu?1?01?xxxx (note 5) 0x01 0x01 0x90 0x51 ax?sip?sfeu ? api ax?sip?sfeu?api?1?01?xxxx (note 5) 0x01 0x01 0x90 0x51 5. tb05 for reel 500, tx30 for reel 3000 . on semiconductor and are trademarks of semiconductor components industries, llc dba on semiconductor or its subsidiaries i n the united states and/or other countries. on semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. a listing of on semiconductor?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent?marking.pdf . on semiconductor reserves the right to make changes without further notice to any products herein. on semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular pu rpose, nor does on semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without li mitation special, consequential or incidental damages. buyer is responsible for its products and applications using on semiconductor products, including compliance with all laws, regulatio ns and safety requirements or standards, regardless of any support or applications information provided by on semiconductor. ?typical? parameters which may be provided in on semicond uctor data sheets and/or specifications can and do vary in dif ferent applications and actual performance may vary over time. all operating parameters, including ?typicals? mus t be validated for each customer application by customer?s technical experts. on semiconductor does not convey any license under its patent rights nor the rights of others. on semiconduc tor products are not designed, intended, or authorized for use as a critical component in life support systems or any fda class 3 medical devices or medical devices with a same or si milar classification in a foreign jurisdiction or any devices intended for implantation in the human body. should buyer purchase or use on semiconductor products for any such unintended or unauthorized application, buyer shall indemnify and hold on semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, cost s, 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 u se, even if such claim alleges that on semiconductor was negligent regarding the design or manufacture of the part. on semiconductor is an equal opportunity/affirmative action employer . this literature is subject to all applicable copyright laws and is not for resale in any manner. p ublication ordering information n. american technical support : 800?282?9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81?3?5817?1050 ax?sip?sfeu/d sigfox and is a registered trademark of sigfox sarl. 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 on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your loc al sales representative ?

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