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skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 1 data sheet skytraq VENUS634FLPX 65 channel low power gps receiver --- flash features z gps receiver in 10mm x 10mm x 1.1mm size z tests 8 million time-frequency hypothesis per sec z open sky cold start 29 second z signal detection better than -161dbm z accuracy 2.5m cep z ~28ma in tracking and navigation mode z multipath detection and suppression z data logging with external spi serial flash z supports active or passive antenna z 1 spi interface and 7 gpio lines z flash-based, firmware customizable z lga44 package with 0.8 pitch z pb free rohs compliant the VENUS634FLPX is a module-in-a-chip design targeting mobile consumer and cellular handset applications. it offers very low current consum ption, high sensitivity, and best in class signal acquisition and time-to-first-fix performance. the VENUS634FLPX contains all the necessary components of a complete gps receiver module, includes gps rf front-end, gps baseb and signal processor, 0.5ppm tcxo, 32.768khz rtc crystal, rtc ldo regulator, and passive components. it requires very low external component count and takes up only 100mm 2 pcb footprint. dedicated massive-correlator signal parameter search engine within the baseband enables rapid search of all the available satellites and acquisition of very weak signal. an advanced track engine allows weak signal tracking and positioning in harsh environments such as urban canyons and under deep foliage. programmable flash-based memory makes it ideal for applications requiring customized firmware. figure-1 gps receiver based on VENUS634FLPX http://
skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 2 technical specifications receiver type l1 frequency gps c/a code sbas capable 51 channel acquisitions 14 channel tracking accuracy position 2.5m cep velocity 0.1m/sec timing 300ns open sky ttff hot start 1 second cold start 29 seconds average reacquisition < 1s sensitivity tracking -161dbm update rate 1hz standard dynamics 4g operational limits altitude < 18,000m *1 or velocity < 515m/s *1 datum default wgs-84 interface uart lvttl level baud rate 4800 / 9600 / 38400 / 115200 software configurable (9600 as default) protocol nmea-0183 v3.01, gga, gll, gsa, gs v, rmc, vtg (default gga, gsa, gsv, rmc, vtg) skytraq binary main supply voltage 2.8v ~ 3.6v backup voltage 1.5v ~ 6v current consumption ~28ma tracking operating temperatur e -40 ~ +85 deg-c storage temperature -40 ~ +125 deg-c package lga44 10mm x 10mm x 1.1mm, 0.8mm pitch *1: cocom limit, either may be exceeded but not both http://
skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 3 pin-out diagram figure-2 VENUS634FLPX pin-out diagram pin definition pin numbe r signal name type description 1 rstn input active low reset input, 3.3v lvttl 2 vcc33i power input main voltage supply input, 2.8v ~ 3.6v 3 nc not connected, empty pin 4 pio12 i/o general purpose i/o pin, 3.3v lvttl 5 gpio2 i/o general purpose i/o pin, 3.3v lvttl 6 gpio1 i/o general purpose i/o pin, 3.3v lvttl 7 led / gpio0 i/o navigation status indi cator or general purpose i/o. 3.3v lvttl 8 gpio24 i/o general purpose i/o pin. 3.3v lvttl also serves as search engine mode selection upon power-up 1: low power acquisition mode 0: enhanced acquisition mode 9 boot_sel i/o boot mode selection. pull-hi gh or pull-low using 10k resistor. must not connect to vcc or gnd directly. 1: execute from internal rom 0: execute from internal flash memory 10 gnd power system ground 11 gnd power system ground 12 nc not connected, empty pin 13 nc not connected, empty pin 14 gpio20 i/o general purpose i/o pin, 3.3v lvttl 15 gnd power system ground 16 nc not connected, empty pin 17 v12o_rtc power output 1.2v ldo output for rtc & backup memory. normally unused. 18 vbat power input rtc & backup memory voltage input, 1.5v ~ 6.0v 19 gnd power system ground 20 nc not connected, empty pin 21 gnd_rf power rf section system ground http://
skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 4 22 gnd_rf power rf section system ground 23 nc not connected, empty pin 24 gnd_rf power rf section system ground 25 gnd_rf power rf section system ground 26 nc not connected, empty pin 27 gnd_rf power rf section system ground 28 gnd_rf power rf section system ground 29 gnd_rf power rf section system ground 30 nc not connected, empty pin 31 gnd_rf power rf section system ground 32 rfin input gps signal input, connect to gps antenna. 33 gnd_rf power rf section system ground 34 nc not connected, empty pin 35 nc not connected, empty pin 36 reg_ena input connect to pin-2 vcc33i 37 pio14 i/o general purpose i/o pin, 3.3v lvttl 38 mosi / pio9 i/o spi data output or general purpose i/o pin, 3.3v lvttl 39 miso / pio8 i/o spi data input or general purpose i/o pin, 3.3v lvttl 40 p1pps output 1 pulse per second output. ac tive after position fix; goes high for about 1msec, 3.3v lvttl 41 spi_clk / pioo7 output spi clock or general purpose output pin, 3.3v lvttl 42 rxd0 input received input of the asynchronous uart port. used to input binary command to the gps receiver. 3.3v lvttl 43 spi_csn / pio6 i/o spi chip select out put or genera l purpose i/o pin, 3.3v lvttl 44 txd0 output transmit output of the asynchronous uart port. used to output standard nmea-0183 sentence or response to input binary command. 3.3v lvttl dc characteristics of digital interface below is when vcc3i is at nominally 3.3v paramete r min. typ. max. units input low voltage 0.8 volt input high voltage 2.0 volt output low voltage, iol = 2 ~ 16ma 0.4 volt output high voltage, ioh = 2 ~ 16ma 2.9 volt http://
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skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 5 recommended pcb footprint figure-3 recommended pcb footprint. blue part is outline of the ic package. red part is outline of the recommended pcb pad layout. http://
skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 6 recommended reflow profile temperature ( ) 25 82.5 140 150 160 170 180 190 200 225 250 250 215 185 155 125 95 65 35 time(minute) 0 0.5 1 1.5 2 2.5 3 3.5 4 4. 5 5 5.5 6 6.5 7 7.5 8 8.5 9 profile description snpb eutectic process lead free process preheat maximum temperature 100+/-10 140+/-10 time( t) 40~60s 50~70s ramp-up ramp-up rate 1 /s max. 1 /s max. time( t) 120~150s 160~200s reflow maximum temperature peak temp . peak temp . minimum temperature 180+/-5 200+/-10 peak temperature 220+/-2 250+/-2 time( t) during peak te m p .+ / - 2 10~30s 20~40s reflow time( t) 120~150s 120~150s cooling cooling rate 1.5 /s max 1.5 /s max time( t) 60~120s 150~180s http://
5 5 4 4 3 3 2 2 1 1 d d c c b b a a optional for data logging application 2 1 3v rechargeable lithium battery l1 optional biasing for active antenna optional skytraq technology, inc. v634flpx_ap001 1.0 venus 634flpx application circuit a 11 tuesday, december 16, 2008 title size document number rev date: sheet of spi_clk mosi miso spi_csn vbat rstn pio12 gpio2 gpio1 led_gpio0 gpio24 ftxd0 frxd0 gnd pio14 gpio20 vbat mosi_pio9 miso_pio8 vcc33 p1pps spiclk_pioo7 gnd_a spicsn_pio6 vcc33 vcc33 vcc33 vcc33 vcc33 vcc33 13 vbat 15 gpio2 8 gpio20 12 frxd0 17 spicsn_pio6 19 spiclk_pioo7 c3 0.1uf u2 sst25vf040 1 2 3 4 8 7 6 5 cs so wp gnd vcc hold sck si 6 p1pps 2 led_gpio0 14 ftxd0 16 gnd 4 gpio24 9 vcc33 20 mosi_pio9 18 miso_pio8 r3 0 c1 1uf 10 pio14 11 gpio1 5 gnd 3 pio12 1 gnd_a 7 rstn u1 v634flpx 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 rstn vcc33i nc pio12 gpio2 gpio1 led / gpio0 gpio24 boot_sel gnd gnd nc nc gpio20 gnd nc rtc_v12o v_bat gnd nc gnd_rf gnd_rf nc gnd_rf gnd_rf nc gnd_rf gnd_rf gnd_rf nc gnd_rf rfin gnd_rf nc nc reg_ena pio14 mosi / pio9 miso / pio8 p1pps spi_clk / pioo7 rxd0 spi_csn / pio6 txd0 r1 33k d1 rb420/rb425 r4 390 bt1 ms621 xc1 1uf e1 antenna 1 c2 1uf l1 33nh r2 4.7k http://
skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 7 application circuit interface signals gnd_a: rf ground led_gpio0: signal to indica te gps position status, or for gpio (3.3v lvttl). active low. gpio24: gpio pin, also serving as search engine mode selection upon power-up 1: low power acquisition mode 0: enhanced acquisition mode pio12, gpio20: gpio pin gnd: digital ground p1pps: 1 pulse per second time-mark (3.3v lvttl) rstn: active low reset input pio14, gpio1, gpio2: gpio pin vcc33: 3.3v power input frxd0: uart input (3.3v lvttl) ftxd0: uart output (3.3v lvttl) vbat: battery-backed rtc and sram supply input, must not be unconnected. spicsn_pio6: spi chip select output or gpio pin miso_pio8: spi data input or gpio pin spiclk_pioo7: spi clock or general purpose output pin mosi_pio9: spi data output or gpio pin http://
skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 8 application information 1. for fast-rising power supply, a simple series r/c reset to pi n-1, rstn, as indicated in the application circuit is suitable. for system having slow-rising power supply, a reset ic providing 2~5ms reset duration may be necessary. 2. the rf input of VENUS634FLPX is already matched to 50-ohm. passive antenna matched to 50-ohm can be directly applied. 3. for using VENUS634FLPX with active antenna, one with gain in range of 10~30db and noise figure < 2db can be used. power to the active antenna needs to be applied externally. 4. pin-18 vbat supplies backup power to the real-time clock and backup sram for fast startup. for portable applications where there is battery with voltage in range of 1.5v ~ 6.0v as the main source, the vbat pin can be directly connected to it. 5. to put VENUS634FLPX in power-down mode, an external 3v ld o regulator with enable control can be used to provide 3v to pin-2 and pin-36. disabling the regulator reduces the total curr ent to < 10ua, consumed by the rtc circuitry and backup sram through vbat pin. when using the described power-down mode, add a pull-up 10k resi stor on pin-44, and add a series 10k resistor on pin-42. 6. like bga device, the venus634f lpx is moisture sensitive. it needs to be handl ed with care to void damage from moisture absorption and smt re-flow. the device should be baked for 24 hour s at 125-degc before mounting for smt re-flow if it has been removed from the protective seal for more than 48hours. 7. default behavior of the chip is firmware dependent. 8. for compatible design with rom-version venus634lpx, pull-down is needed for pio12, gpio2, and gpio1. 9. the supported spi flash memory veri fied for data logging application are: manufacturer device id size eon en25f040 4mbit eon en25f080 8mbit mxic mx25l400 4mbit mxic mx25l800 8mbit mxic mx25l1605 16mbit mxic mx25l3205 32mbit mxic mx25l6405 64mbit winbond w25x40 4mbit winbond w25x80 8mbit winbond w25x16 16mbit winbond w25x32 32mbit winbond w25x64 64mbit sst sst25lf040 4mbit sst sst25lf080 8mbit sst sst25vf016 16mbit sst sst 25vf032 32mbit http://
skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 9 nmea messages the full descriptions of supported nmea messages are provided at the following paragraphs. gga - global positioning system fix data time, position and fix related data for a gps receiver. structure: $gpgga,hhmmss.sss,ddmm.mmmm ,a,dddmm.mmmm,a,x, xx,x.x,x.x,m,, ,,xxxx*hh 1 2 3 4 5 6 7 8 9 10 11 example: $gpgga,111636. 932,2447.0949,n, 12100.5223,e,1, 11,0.8,118.2,m ,,,,0000*02 field name example description 1 utc time 111636.932 utc of position in hhmmss.sss format, (000000.000 ~ 235959.999) 2 latitude 2447.0949 latitude in ddmm.mmmm format leading zeros transmitted 3 n/s indicator n latitude hemisphere indicator, ?n? = north, ?s? = south 4 longitude 12100.5223 longitude in dddmm.mmmm format leading zeros transmitted 5 e/w indicator e longitude hemisphere indicator, 'e' = east, 'w' = west 6 gps quality indicator 1 gps quality indicator 0: position fix unavailable 1: valid position fix, sps mode 2: valid position fix, differential gps mode 3: gps pps mode, fix valid 4: real time kinematic. system used in rtk mode with fixed integers 5: float rtk. satellite system used in rtk mode. floating integers 6: estimated (dead reckoning) mode 7: manual input mode 8: simulator mode 7 satellites used 11 number of satellites in use, (00 ~ 12) 8 hdop 0.8 horizontal dilution of precision, (00.0 ~ 99.9) 9 altitude 108.2 mean sea level (geoid), (-9999.9 ~ 17999.9) 10 dgps station id 0000 differential reference station id, 0000 ~ 1023 null when dgps not used 11 checksum 02 http://
skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 10 gll ? latitude/longitude latitude and longitude of current position, time, and status. structure: $gpgll,ddmm.mmmm,a,dddmm.mmmm,a, hhmmss.sss,a,a*hh 1 2 3 4 5 6 7 8 example: $gpgll,2447.0944,n,12100.5213, e,112609.932,a,a*57 field name example description 1 latitude 2447.0944 latitude in ddmm.mmmm format leading zeros transmitted 2 n/s indicator n latitude hemisphere indicator ?n? = north ?s? = south 3 longitude 12100.5213 longitude in dddmm.mmmm format leading zeros transmitted 4 e/w indicator e longitude hemisphere indicator 'e' = east 'w' = west 5 utc time 112609.932 utc time in hhmmss.sss format (000000.000 ~ 235959.999) 6 status a status, ?a? = data valid, ?v? = data not valid 7 mode indicator a mode indicator ?n? = data not valid ?a? = autonomous mode ?d? = differential mode ?e? = estimated (dead reckoning) mode ?m? = manual input mode ?s? = simulator mode 8 checksum 57 http://
skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 11 gsa ? gnss dop and active satellites gps receiver operating mode, satellites used in the naviga tion solution reported by the gga or gns sentence and dop values. structure: $gpgsa,a,x,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,x.x,x.x,x.x*hh 1 2 3 3 3 3 3 3 3 3 3 3 3 3 4 5 6 7 example: $gpgsa,a,3,05,12,21,22,30,09,18,06,14,01,31,,1.2,0.8,0.9*36 field name example description 1 mode a mode ?m? = manual, forced to operate in 2d or 3d mode ?a? = automatic, allowed to automatically switch 2d/3d 2 mode 3 fix type 1 = fix not available 2 = 2d 3 = 3d 3 satellite used 1~12 05,12,21,22,3 0,09,18,06,14, 01,31,, satellite id number, 01 to 32, of satellite used in solution, up to 12 transmitted 4 pdop 1.2 position dilution of precision (00.0 to 99.9) 5 hdop 0.8 horizontal dilution of precision (00.0 to 99.9) 6 vdop 0.9 vertical dilution of precision (00.0 to 99.9) 7 checksum 36 http://
skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 12 gsv ? gnss sate llites in view number of satellites (sv) in view, satellite id numbers, elevation, azimuth, and snr value. four satellites maximum per transmission. structure: $gpgsv,x,x,xx,xx,xx,xxx,xx,?,xx,xx,xxx,xx *hh 1 2 3 4 5 6 7 4 5 6 7 8 example: $gpgsv,3,1,12,05,54,069,45,12,44,061,44,21,07,184,46,22,78,289,47*72 $gpgsv,3,2,12,30,65,118,45,09,12,047,37,18,62,157,47,06,08,144,45*7c $gpgsv,3,3,12,14,39,330,42,01,06,299,38,31,30,256,44,32,36,320,47*7b field name example description 1 number of message 3 total number of gsv messages to be transmitted (1-3) 2 sequence number 1 sequence number of current gsv message 3 satellites in view 12 total number of satellites in view (00 ~ 12) 4 satellite id 05 satellite id number, gps: 01 ~ 32, sbas: 33 ~ 64 (33 = prn120) 5 elevation 54 satellite elevation in degrees, (00 ~ 90) 6 azimuth 069 satellite azimuth angle in degrees, (000 ~ 359 ) 7 snr 45 c/no in db (00 ~ 99) null when not tracking 8 checksum 72 http://
skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 13 rmc ? recommended minimum specific gnss data time, date, position, course and speed data provided by a gnss navigation receiver. structure: $gprmc,hhmmss.sss,a,dddmm. mmmm,a,dddmm.mmmm,a,x.x,x.x, ddmmyy,,,a*hh 1 2 3 4 5 6 7 8 9 10 11 example: $gprmc,111636. 932,a,2447.0949, n,12100.5223,e, 000.0,000.0,030407 ,,,a*61 field name example description 1 utc time 0111636.932 utc time in hhmmss.sss format (000000.00 ~ 235959.999) 2 status a status ?v? = navigation receiver warning ?a? = data valid 3 latitude 2447.0949 latitude in dddmm.mmmm format leading zeros transmitted 4 n/s indicator n latitude hemisphere indicator ?n? = north ?s? = south 5 longitude 12100.5223 longitude in dddmm.mmmm format leading zeros transmitted 6 e/w indicator e longitude hemisphere indicator 'e' = east 'w' = west 7 speed over ground 000.0 speed over ground in knots (000.0 ~ 999.9) 8 course over ground 000.0 course over ground in degrees (000.0 ~ 359.9) 9 utc date 030407 utc date of position fix, ddmmyy format 10 mode indicator a mode indicator ?n? = data not valid ?a? = autonomous mode ?d? = differential mode ?e? = estimated (dead reckoning) mode ?m? = manual input mode ?s? = simulator mode 11 checksum 61 http://
skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 14 vtg ? course over ground and ground speed the actual course and speed relative to the ground. structure: gpvtg,x.x,t,,m,x.x,n,x.x,k,a*hh 1 2 3 4 5 example: $gpvtg, 000.0,t,,m,000.0,n,0000.0,k,a*3d field name example description 1 course 000.0 true course over ground in degrees (000.0 ~ 359.9) 2 speed 000.0 speed over ground in knots (000.0 ~ 999.9) 3 speed 0000.0 speed over ground in kilometers per hour (0000.0 ~ 1800.0) 4 mode a mode indicator ?n? = not valid ?a? = autonomous mode ?d? = differential mode ?e? = estimated (dead reckoning) mode ?m? = manual input mode ?s? = simulator mode 5 checksum 3d http://
skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 15 ordering information part number description VENUS634FLPX single chip gps module, flash version skytraq technology, inc. 4f, no.26, minsiang street, hsinchu, taiwan, 300 phone: +886 3 5678650 fax: +886 3 5678680 email: info@skytraq.com.tw ? 2008 skytraq technology inc. all rights reserved. not to be reproduced in whole or part for any purpose withou t written permission of skytraq technology inc (?skytraq?). information provided by skytraq is believed to be accurate and re liable. these materials are provided by skytraq as a service t o its customers and may be used for informational purposes only. skytraq assumes no responsibility for errors or omissions in these materials, nor for its use. skytraq reserves the ri ght to change specification at any time without notice. these materials are provides ?as is? without warranty of any kind, either expressed or implied, relating to sale and/or use of skytraq products including liability or warranties relating to fitness for a particular purpose, consequential or incidental da mages, merchantability, or infringement of any patent, copyright or ot her intellectual property right. skytraq further does not warran t the accuracy or completeness of the informati on, text, graphics or other items contained within these materials. skytraq shall not be liable for any special, indirect, incidental, or consequential dam ages, including without limitation, lost revenues or lost pro fits, which may result from the use of these materials. skytraq products are not intended for use in medical, life-supp ort devices, or applications involving potential risk of death, personal injury, or severe property damage in case of failure of the product. http://
skytraq technology, inc. www.skytraq.com.tw empower mobility, without uncertainty 16 change log version 0.5, january 30, 2009 1. supply voltage changed from 2.7 ~ 3.3v to 2.8 ~ 3.6v 2. operating temperature changed fr om -30 ~ +85degc to -40 ~ +85degc 3. supported spi flash memory model for data lo gging added in application information item 9 version 0.4, january 23, 2008 1. baud rate description on page-2 modified. 2. pin-8 gpio24 enabled to select search engine acquisition mode upon power-up. 3. application information item #8 added. version 0.3, december 28, 2008 1. pin-19 changed from rf ground to system ground. version 0.2, november 30, 2008 1. reflow maximum temperature changed from 240+/-2degc to 250+/-2degc. version 0.1, november 6, 2008 1. initial release http://

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