GPS_Receiver_A2135_H_usermanual_V022015-09
Contents
1. Table 1 A2135 H GPS characteristics 1 The calibrated clock of the receiver has not stopped thus it knows precise time to the us level 2 The receiver has estimates of time date position and valid almanac and ephemeris data 3 The receiver has estimates of time date position and recent almanac 4 The receiver has no estimate of time date position and no recent almanac Note Performance sensitivity and TTFF might slightly decrease below 30 C 1 5 2 Mechanical Characteristics A2135 H Mechanical dimensions Length 17 78 0 20 mm 0 7 0 008 Width 16 5140 20 mm 0 65 0 008 Height 7 11 mm 0 28 Max A2135 H Weight 4 0 g 0 14 oz Table 2 A2135 H dimensions and weight 1 6 Handling Precautions The GPS receiver module A2135 H is sensitive to electrostatic discharge ESD Please handle with appropriate care V0 2 Sep 14 User s Manual Page 9 of 38 maestro N GPS receiver 2 Ordering Information 2 1 GPS Receiver A2135 H The order number is built as follows e A2135 Hxxxx A2135 H is the model name The xxxx refers to the current part number on the module 2 2 Packing The A2135 H GPS modules come in a tape and reel package suitable for pick and place machines A Pi za _ Fo OO OO 6 gt Le 666666 OS G 7 I UI a H Fi D B T al el Si KR EE LEE 1540 1 m m 10xP0 40 40 2 Figure 2 A2135 H tape specifications 1 V0 2 Se2. V0 2 Sep 14 User s Manual Page 6 of 38 maestro7Y GPS receiver 1 2 Characteristics Overview The module s most important characteristics are Operable at 3 3V 24mA 1fix per second e UART interface at CMOS level e Internal Power On Reset POR reset chipset to prevent memory corruption if main power removal abruptly Internal 2 Mb SPI Flash Small form factor of 17 78 x 16 51 mm 0 7 x 0 65 Supported temperature range 40 C to 85 C Single sided SMT component for reflow soldering RoHS compliant lead free Tape amp reel packaging Excellent antenna support o On module patch antenna o Antenna input for direct connection of external active antenna o RF switch to select between antennas The antenna receiver module is available as an off the shelf component 100 tested and shipped in tape and reel packaging 1 3 RoHS and Lead Free Information Maestro s products marked with the lead free symbol either on the module or the packaging comply with the Directive 2002 95 EC of the European Parliament and the Council on the Restriction of Use of certain Hazardous Substances in Electrical and Electronic Equipment RoHS RoHS 2002 95 EC All Maestro GPS receiver modules GPS antenna receiver module and telematics units are ROHS compliant V0 2 Sep 14 User s Manual Page 7 of 38 ei maestro GPS receiver sid 1 4 Label The A2135 H label size 12 0x 4 0 mm contains the following information
3. 85 C High Temperature Operating Life 85 C Vibration Variable Frequency Mechanical Shock Please contact Maestro for detailed information 9 3 Production Test Each module is electrically tested prior to packing and shipping to ensure state of the art GPS receiver performance and accuracy V0 2 Sep 14 User s Manual Page 30 of 38 maestro7Y GPS receiver 10 Applications and Hints 10 1 Initial Module Start After initially applying power to the module it is necessary to start the internal firm ware by toggling the ON_OFF pin Toggling is done by pulling the signal to HIGH for about 200ms This first toggling can be done after a LOW HIGH transmission was detected at the WAKEUP pin or by simply waiting for 1s after power up In UART mode output messages should immediately be displayed If no messages then a new toggling should be applied 10 2 Proper Shutdown A controlled and orderly shutdown while the A2135 H is running in full power mode can be initiated by e A200ms pulse on the ON OFF pin e Appropriate messages either in NMEA or OSP mode The shutdown is completed after maximum 1s Therefore the module should be supplied with voltage for that time after the shutdown sequence was initiated 10 3 SiRFaware Support SiRFaware is a low power operating mode that seeks to maintain low uncertainty in position time and frequency and to maintain valid current Ephemeris using either data collected from sate
4. 27 of 38 maestro GPS receiver 8 Use of External Antenna 8 1 Connection of RF Signal The ANT_EXT pin is used to connect the receiver with the GPS antenna The design of the antenna connection has to be strictly done according to RF design rules A 50 Q PCB strip line is required The following drawings shall explain the guidelines A major rule is to keep the strip line as short as possible Additionally Strip line needs a good reference ground Motherboard top layer Motherboard GND layer d Solder pads i Solder pads Figure 14 Antenna connector strip line A2135 H In order to achieve the impedance of 50 Q the width of the strip line needs to be calculated It depends on the thickness or height of the PCB layer both parameters are shown in following drawing For the calculation it is assumed that the PCB material is FR4 50 Q strip line eer L GND Figure 15 Strip line parameters A2135 H In this case the width should be about 1 8 times the height of the PCB W 1 8 x H In the example one would get a width of W 1 8 x 0 8 mm 1 44 mm V0 2 Sep 14 User s Manual Page 28 of 38 maestro7Y GPS receiver 8 2 External Antenna 8 2 1 Recommended Parameters General GPS active antenna specification Limitations e Supply voltage according to voltage fed into VANT pin 5 V max e Supply current 50 mA max Recommendations e Gain 220 dB should not exceed 35 dB e Noise figure lt 1 5 dB The re
5. AMENNA EE 17 KE ME Se CN 17 A 4 Improved TIFF iis EE EE ene Ee DE EE Ge ER DE Ee Ee ER EE Ee De Ee Ee 17 3 5 Self start configuration RA 17 4 VET ET TE Mer IT OO EE nnna 18 4 1 Details Component Side A2135 H sesse ees ees ee ee ee ee ee ee ee ee ee ee ee ee 18 4 2 Details Solder Side A2135 H iss esse be ss Seed ee Ge ee Ge ee SS ged Sek DE GE 19 5 Pin out Informasie RE N N deeg 20 RE TEE E EE 20 5 2 Description A2135 H Signals EE 21 6 Electrical Characteristics iss ee EER RR ee EER RR Ee EER RR ee G EE RR RR ee e EER RR Re GE EER RR Re ee EE 23 6 1 ees ske eis el AE dea EE N N N n 23 6 2 Absolute Maximum Ratings EEN 23 6 3 DG ee Ee e 24 7 Mountihnd isi esse sd we Ee N KA N N We N N N N GE Ed ee N ER N Ki id 25 7 1 Proposed Footprint for Soldering AEN 25 7 2 PCB Design E 26 7 3 Recommended Profile for Reflow Soldering sees 27 8 Use of External Antenna esse ees EER Re ER RR Re eEEERR R Re GE EER RR Re ee EER RR Re ee EER RR Re ee EER 28 8 1 Connection of RF Signal ee RA RR ee ee ee ee ee 28 8 2 External ARIE EE GE ener GR ener Petree IE GE ne Ge 29 8 2 1 Recommended Parametere iese ee ee ee ee ee ee ee EE ee ee ER ee ee ee Re ee ee Re ee ee ee EE 29 8 2 2 HNIS EE EE EE EE N N 29 V0 2 Sep 14 User s Manual Page 4 of 38 N ei maestro 3 GPS receiver 9 Quality RETTEN A 30 9 1 Environmental Conditions N NA Sk SE SN Sk Se NN SE N Ee AS N Ge De ee ke de 30 9 2 Product Qualification AR EE EE EE ER
6. DO 50 e 7 VOG SV ExtInvGPIO8 fg w 5 WAKEUP ON OFF g 6 Vout NC4 rr H GND NC3 ig TM_GPIO5 CAS 10K NC2 ig Host Port I2C_CLK 73 NCI 7 GPIO6 SPI CLK GPI02 3 GPIO7 SPI CS ANT_SW IHH GND VANT H ANT_EXT N o GND_PAD2 GND_PAD4 GND_PAD5 GNDCPADS GND_PAD7 GND_PAD8 GND_PAD1 GND_PAD3 23 24 25 27 28 30 Figure 7 Self start configuration A2135 H For self start mode full power operation will be activated once Vcc applied No power saving mode PTF MPM Hibernation will be supported N go V0 2 Sep 14 User s Manual Page 17 of 38 maestro 3 GPS receiver g 4 Mechanical Outline 4 1 Details Component Side A2135 H 40 10 16 15 3 81 10 2 54 05 1 27 00 0 00 00 0 00 All dimensions in mm inches Figure 8 Mechanical outline component side A2135 H V0 2 Sep 14 User s Manual Page 18 of 38 maestro GPS receiver 4 2 Details Solder Side A2135 H 17 78 15 24 Solder pad size outer pads 1 0 x 0 8 Solder pad size inner pads 1 27 x 1 27 All dimensions in mm Figure 9 Mechanical outline solder side A2135 H V0 2 Sep 14 User s Manual Page 19 of 38 5 Pin out Information 5 1 Layout A2135 H GPIO6 7 GPIO7 8 GND 9 V0 2 Sep 14 DOEN maestro GPS receiver 22 RX0 21 TXO 20 Extint 19 ON OFF 18 NC 17 NC 16 TM_GPIO5 15 NC 14 Host port I2C_CLK 13 NC
7. GPIO2 12 ANT_SW 11 VANT 10 ANT_EXT Figure 10 Pin out information top view A2135 H User s Manual Page 20 of 38 maestro GPS receiver 5 2 Description A2135 H Signals Pin Symbol Function Description 1 nRST Input Reset input active low 2 NC None Leave open 3 VCC3V3 Power Supply 3 0 3 6 VDC 4 WAKEUP Output Status of digital section Push Pull output Low OFF KA Keep Alive only Hibernate or Standby mode High ON operational mode Connect it to ON_OFF pin for self start mode 5 Vout Voltage Output Permanent 1 8V voltage output for up to 20mA current max 6 GND Power Supply Ground power supply 7 GPIO6 Input Configuration pin for communication mode 10K to 1 8V CTS for UART mode leave open for SPI amp host port DC SPI CLK modes SPI clock pin when module works in SPI mode 8 GPIO7 Input Configuration pin for communication mode 10K to GND RTS for host port DC mode leave open for SPI amp UART SPI CS modes SPI chip select pin when module works in SPI mode 9 GND Power Supply Ground power supply 10 ANT_EXT Antenna Input Antenna signal Z 50 Ohm external active antenna in put 11 VANT Power supply Power supply antenna provide according voltage up to 5 0 VDC VANT feeds Pin 10 ANT_EXT 12 ANT_SW Input Antenna switch LOW or open internal antenna HIGH external antenna 13 GPIO2 None Leave open 14 Host Port
8. H tape specifications 7 10 Figure 3 A2135 H tape specifications 3 11 Figure 4 A2135 H tape specifications 3 11 Figure 5 Minimum configuration Za sissies esse IR KERE ek KERS EK EE EEN eg Ged eed 15 Figure 6 RS232 level shifter for minimum configurations iese ees ee ee ee 16 Figure 7 Self start configuration A2135 H EE 17 Figure 8 Mechanical outline component side A2185 H sesse ees ee ee ee ee 18 Figure 9 Mechanical outline solder side A21385 H ees ees ee ee ee ee ee ee ee ee ee ee 19 Figure 10 Pin out information top view A2135 H esse see ee ee ee ee ee ee ee ee ee ee ee 20 Figure 11 Proposal of Soldering fOOTDrINE sesse ee ee ee ee ee ee 25 Figure 12 Proposal 1 of the PCB design sissies Eb gee Ko BEES GEED ees Se so Ee RE ee 26 Figure 13 Proposal 2 of the PCB desiONn is Ee ee Ee Ee Ge Ge Me De se DE ee 26 Figure 14 Antenna connector strip line A2135 H esse see ee ee ee ee ee ee ee ee ee ee 28 Figure 15 Strip line parameters AZT2b H REENEN 28 Figure 16 1PPS waveform reference sesse ee ee ee ee ee ee ee 33 Figure 17 Evaluation kit EVA2135 H EE 35 V0 2 Sep 14 User s Manual Page 37 of 38 maestro Y GPS receiver 14 List of Tables Table 1 A2135 H GPS Characteristics os EE ek eks EE GEGUN scaveeessenveceeseneeteesanesenens 9 Table 2 A2135 H dimensions and weight 9 Table 3 Additional eoupment ee 13 Table 5 Pin description A2135 H sessies iss
9. d TF Factory code A2135 H pears xxxxxx serial number pe EES XXXXXX yy assembly year yyww ww assembly week 1417 General description Example Figure 1 A2135 H label The label is placed on the side of the GPS antenna The data matrix code holds the product type part number patch release hardware release factory code year amp week of assembly and a 6 digit serial number Due to limited space on module label only product type year amp week of assembly and 6 digit serial number will be printed on it Representing Factory Product Part Patch Hardware Assembly Serial location Number Number Release Release Year Week Number Number of XX XXXXXXX XXXX XX XX XXXX XXXXXX digits 2 6 4 2 2 4 6 16 Example TF A2135H 9333 01 01 1417 000005 Meaning TF Given Given Given Given Year 14 Increment Week 17 from 000001 up to 999999 Example of MID TFA2135H933301011417000005 V0 2 Sep 14 User s Manual Page 8 of 38 maestro GPS receiver 1 5 Characteristics The module is characterized by the following parameters 1 5 1 GPS Characteristics Channels 48 parallel tracking Correlators fs 400 000 Frequenc PL 1 575 MHz Tracking Sensitivity 163 dBm On module antenna Horizontal Position Accuracy lt 2 5 m CEP SA off Time To First Fix TTFF Dis theoretical minimum values DAS values in real world may differ c 35 e Cold lt 38s
10. to have an easier mi gration for existing customers using A2035 H A2235 H we decided to keep same pin assignment as that of A2035 H A2235 H Additional pins for supporting external antenna won t affect this drop in replacement property Since there is an RF feed point underneath the module special PCB design is required on user s application Receiver part of A2135 H is fully identical to A2200 A with latest CSR Premier ROM 9333 and enabling 12C host port Host Port I2C_CLK Pin 14 was added for this new function The A2135 H is a module designed for a 3 3V environment 1 1 Feature Overview The A2135 H is a new module with the following outstanding features e Fast responsive location experience o High sensitive navigation engine with tracking down to 163dBm o 48 track verification channels o SBAS WAAS EGNOS MSAS GAGAN e Breakthrough micro power technology o Requires only 50 500A to maintain hot start capability e Active jammer remover o Removes in band jammers up to 80dB Hz o Tracks up to eight CW continuous wave jammers Size 17 8mm L x 16 5mm W x 6 7mm H Operating voltage 3V3 Extremely low power consumption by using DC DC converter No back up battery required MEMS supports TCXO is used for providing stable 16 369MHz system clock CSR Premier ROM 9333 is used which is equivalent to Release 2 2 i e F W 4 1 2 Support external active antenna e Support SGEE and CGEE e Build in LNA with close to 20dB gain
11. 1 42mA Full power mode Searching Average Current 2 36mA Full power mode Tracking Average Current 3 24mA TricklePower Mode 8 7mA Push to Fix Mode 0 7mA Micro Power Mode SiRFaware 100uA Hibernate Status 27uA Table 5 A2135 H electrical characteristics 1 Peak searching current is characterized by millisecond bursts above average searching current 2 Average searching current is typically only the first two seconds of TTFF 3 Tracking current typically includes tracking and the post searching portion of TTFF 6 2 Absolute Maximum Ratings Symbol Parameter Min Max Unit Vcc Power supply 0 3 4 6 V Vin Voltage to I O pin 0 3 13 6 V lov Input current on any pin 10 10 mA ltdv Absolute sum of all input currents during overload condition 200 mA Tst Storage temperature 40 85 Table 6 Absolute maximum ratings Stresses beyond those listed under Absolute Maximum Ratings may cause per manent damage to the device This is a stress rating only Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied Exposure to absolute maximum rating conditions for extended periods may affect device reliability V0 2 Sep 14 User s Manual maestro Page 23 of 38 ei maestro7Y GPS receiver 6 3 DC Electrical Characteristics Symbo
12. 2135 H offers an on module antenna an additional external active antenna can be used Switching between both antennas is done via pin 12 see also 5 2 Description A2135 H Signals It is recommended to use an active GPS an tenna with supply voltage of 3 to 5 VDC and a current draw of 50 mA maximum The quality of the GPS antenna chosen is greatly importance to the overall sensitivity of the GPS system An active antenna should have a gain 20 dB and a noise figure lt 1 5 dB which applies to more than 95 of the active antennas available in the market 3 3 Serial Port Settings In UART operation defined by the external pull up resistor as outlined in Minimum Configuration the default settings are e Serial 0 NMEA 4800 baud 8 data bits no parity 1 stop bit no flow control 3 4 Improved TTFF In order to improve the TTFF Time To First Fix it is recommended to keep Vcc supplied at all times This will allow taking advantage of sophisticated low power mode features of the SiRFstarlV ROM chip set 3 5 Self start configuration In order to minimize the GPIO required for operating A2135 H WAKEUP pin 4 and ON_OFF pin 19 can be tied together for entering the self start mode such that no ON_OFF pulse requires Figure 7 shows the recommended connection for self start configuration with UART host port enabled A2135 H lt gt H orst RXO SPI DI Host Port I2C DIO a sz 3 3V T 37 NC1 TXO SPI
13. EE 30 9 3 Produclian Test ee ee ed ee ee oe ie ee ee 30 10 Applications and Hints ss sade ss ase ed sedes ns d ENE GAN NAAR GN dee GN Rade NN eN Gede 31 10 1 Initial Mod le Star Seed De ee aaa ee 31 10 2 Proper Shutdown EE 31 10 3 SiRFaware Support u ees ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 31 10 4 Push to Fix Mode se ee N N ede KG ee De ee ie Pe 31 10 5 Hibernat le os EE ee Wi ee 32 10 6 Extended Ephemeri EEN 32 10 7 TM_GPIO5 pin 1 pulse per second pm 32 10 8 5 Hz Navigation Update Hate 33 10 9 Factory tesel es ie eN Eed ve GE Ge Rd Ee ee ee Ee OE Ee Ge ds 34 11 Evaluation Kit EVA2135 H ees ees seek nee seek ke ee seek Re ee EE RR RR ee EER R ke ee EER RR Re ee EER RR Re ee EE 35 12 Related Informati n sin egene KEG ES OES OR EG GER EG ER ER we Ede ee GR 36 121 ONSE RE ee ee ee OK ER N ee Ee N ee YTE Na Sae 36 12 2 Related ee CN 36 12 3 Related WER ee EEN 36 KARTEN 37 W RE ge WO Ss si EER ER RE N EE ENE Ge RE GE ee Re ee ee ee 38 V0 2 Sep 14 User s Manual Page 5 of 38 N p maestro 3 GPS receiver 1 Introduction A2135 H is a variant to A2235 H with build in 2Mb SPI Flash This antenna module based on SiRF Star IV ROM based chip and with an on board patch antenna 15mm x 15mm x 4mm It is cost down version of A2035 H with reduced size and stacked up antenna architecture RF switch was implemented so as to support external active antenna for performance enhancement if required In order
14. ESTRO SHALL NOT BE RESPONSIBLE FOR THE AVAILABILITY OF SUCH EXTERNAL SITES OR RESOURCES AND DOES NOT ENDORSE AND IS NOT RESPONSIBLE OR LIABLE FOR ANY CONTENT ADVERTISING PRODUCTS OR OTHER MATERIALS ON OR AVAILABLE FROM SUCH SITES OR RESOURCES MAESTRO SHALL NOT BE RESPONSIBLE OR LIABLE DIRECTLY OR INDIRECTLY FOR ANY DAMAGE OR LOSS CAUSED OR ALLEGED TO BE CAUSED BY OR IN CONNECTION WITH USE OF OR RELIANCE ON ANY SUCH CONTENT GOODS OR SERVICES AVAILABLE ON OR THROUGH ANY SUCH SITE OR RESOURCE MAESTRO RESERVES THE RIGHT TO CHANGE MODIFY OR IMPROVE THIS DOCUMENT OR THE PRODUCT DESCRIBED HEREIN AS SEEN FIT BY MAESTRO WITHOUT FURTHER NOTICE V0 2 Sep 14 User s Manual Page 3 of 38 N ei maestro 3 GPS receiver Table of Contents Updates Serial Port EENEG 2 1 Introduction EE 6 1 1 Feature OvervleW gege 6 Ee eis ee EO N N EE OR ER oe 7 1 3 ROHS and Lead Free Information 7 W Bel EE De ED Ee ed N Ge en EE ERER 8 Ede EI Ve TANS TUS AR AG OO EG at ear tr ttl A E O 9 1 5 1 GPS Charachertetlce ee ee ee ee ee ee ee anin ee ee ee EE ee ee Re ee 9 1 5 2 Mechanical Characteristics iese ee ee ee ee ee ee ee ee ee EE ee ee ee ee ee ee Ee ee ee Re ee ee 9 1 6 FRAMING PRECAUTIONS ccc EE EE gege SG Se ee Ee De 9 2 Ordering Information ET 10 2 1 GPS Receiver A2135 H E 10 2 2 ale EER OE N 10 2 3 Additional Equipment RE ienna serein sanagara iiaae gaiak ue deter slaves ieee 13 3 Quick Start EN 14 3 1 Minimum e ale In EE 15 3 2
15. Ee RE DEERE Se EE EE eed N Ee GE eg de de ed ie 22 Table 6 A2135 H electrical characteristics iis ESEG EER ESE EE ER EES ENE EK Ese 23 Table 7 Absolute maximum ratings EE 23 Table 8 DC electrical characteristics EE 24 Table 9 Reflow soldering profile A3 238H ies ee ee ee ee ee ee ee ee ee ee ee ee 27 Table 10 Environmental conditions esse ee ee ee ee ee Re ee ee ee ee 30 V0 2 Sep 14 User s Manual Page 38 of 38
16. Input Host port 12C clock pin when module works in host port DC CLK 2C mode 15 NG None Leave open 16 TM GPIOS Output Time Mark 1PPS signal 17 NC None Leave open 18 NC None Leave open 19 ON_OFF Input Connect to push pull output This is mandatory Set to LOW by default Toggle to HIGH and back to LOW gt for first start up after power on gt to request a fix in SiRFaware or PTF mode gt to go into or wake up out of hibernate mode Connect it to WAKEUP pin for self start mode V0 2 Sep 14 User s Manual Page 21 of 38 maestro7Y GPS receiver 20 Extint Input Interrupt input for MEMS interface If ExtInt is not going to GPIO8 be used it is recommended that this pin be tied directly to ground Otherwise a 100K pull down resistor to ground should be connected to the Extint pin 21 TXO Output Serial output O NMEA out if configured for UART SPI DO SPI data out pin when module works in SPI mode 22 RX0 Input Serial input O NMEA in if configured for UART SPI DI SPI data in pin when module works in SPI mode Host Port Host port 12C data VO pin when module works in hist port DC DIO DC mode Table 4 Pin description A2135 H V0 2 Sep 14 User s Manual Page 22 of 38 6 Electrical Characteristics 6 1 Operating Conditions GPS receiver Pin Description Min Typical Max 3 Vcc 3 0V 3 3V 3 6V Full power mode Searching Peak Current
17. atory V0 2 Sep 14 User s Manual Page 14 of 38 3 1 Minimum Configuration The following picture shows the minimum configuration for NMEA or binary outputs received and commands sent via an RS232 interface based on the GPS module A2135 H A2135 H nRST RXO SPI DI Host Port I2C_DIO NC1 TXO SPI DO VCC_3V3 ExtinvGPIO8 WAKEUP ON_OFF Vout NC4 GND Host Port DC CU GPIOG SPI CLK NC GPIO2 GPIOT7ISPI CS ANT_SW GND VANT ANT_EXT GND_PAD2 GND_PAD3 GND_PAD4 GND_PAD5 GND_PAD6 GND_PAD7 GND_PAD8 GND_PAD1 27 maestro GPS receiver Figure 5 Minimum configuration A2135 H NOTE It is recommended to supply Vcc continuously Use SiRFaware or other low power modes to reduce power consumption of the module while no position information is required External antenna input impedance is 50 Q Match as close as possible Maximum allowed external antenna current is 50 mA Consider a current li V0 2 Sep 14 miter User s Manual Page 15 of 38 maestro7Y GPS receiver For completeness the following picture shows the use of an RS232 level shifter RS232 Out DB9 female Figure 6 RS232 level shifter for minimum configurations Remarks e Place C1 to C5 here 0 1uF close to MAX3232 For capacity values see datasheet of actual component used e Use 3 3V level shifter MAX3232 or equivalent V0 2 Sep 14 User s Manual Page 16 of 38 ei maestro GPS receiver 3 2 Antenna Although the A
18. commendations apply to the majority of active antennas that can be found in the market The quality and suitability of the GPS antenna chosen is off great importance to the overall sensitivity of the GPS system The system design needs to reflect the supply voltage of the antenna If the supply voltage is equal to Vcc then it could be connected to VANT If the antenna requires a different supply voltage the antenna bias can be provided through the VANT pin 8 2 2 Hints Unused antenna inputs should be terminated with 50 Q 20 Do not feed the an tenna supply voltage into terminated antenna inputs V0 2 Sep 14 User s Manual Page 29 of 38 maestro Y GPS receiver g 9 Quality and Reliability 9 1 Environmental Conditions Operating temperature 40 85 C Operating humidity Max 85 r H non condensing at 85 C MSL JEDEC Moisture Sensitivity Level 3 Storage 6 months in original package Table 9 Environmental conditions 9 2 Product Qualification Prior to product qualification the GPS receiver is preconditioned according to EIA JEDEC standard JESD22 A113 B Level 3 Basic qualification tests e MSL Classification according to J STD 020C MSL3 245 C Refer to report SZRL2011110048 e MSL Rework Compatibility according to J STD 020C Refer to report SZRL2011110048 Temperature Cycling 40 C 85 C Temperature Humidity Bias 70 C 85 RH Low High Temperature Operating 40 C
19. e derived and maintained within around 90ns under good signal conditions Note The 1PPS clock accuracy directly depends on the position accuracy The GPS signals travel at the speed of light therefore a position inaccuracy directly translates into 1PPS inaccuracies 10m position deviation 33ns 1PPS deviation typically 100m position deviation 333ns 1PPS deviation typically V0 2 Sep 14 User s Manual Page 32 of 38 maestro GPS receiver The NMEA messages containing absolute timing information UTC time are pro vided around 300ms after the 1PPS signal typically This may change with the GPS receiver setup The 1PPS signal is provided on a as is basis with no accuracy specification It s NOT recommended to use 1PPS signal for accurate timing application The given values are based on a 10 satellite static GPS simulator scenario Figure 16 1PPS waveform reference 10 8 5 Hz Navigation Update Rate User can select 1Hz or 5Hz output rate of navigation computation and message it supports rapid change of direction and improves accuracy on sport related applica tions 1Hz is the default Navigation Update Rate If the user want to change to 5Hz Navigation Update Rate Please refer to command below Enable 5Hz Navigation Update Rate command e NMEA command MID103 PSRF103 00 6 00 0 23 e OSP command MID136 A0 A2 00 OE 88 00 00 04 04 00 00 00 00 00 00 00 OF 02 00 A1 BO B3 Disable 5Hz and return to 1Hz Navigat
20. f the serial port 0 therefore sending NMEA sentences and accepting commands At the same time it provides power to the module Accompanied by an antenna it offers a ready to go set For the development of new software and applications the Evaluation Kit also pro vides NMEA messages on CMOS level via a terminal plug Figure 17 Evaluation kit EVA2135 H For further information please contact Maestro V0 2 Sep 14 User s Manual Page 35 of 38 N ei maestro 3 GPS receiver 12 Related Information 12 1 Contact This manual was created with due diligence We hope that it will be helpful to the user to get the most out of the GPS module Any inputs regarding possible errors or mistakable verbalizations and comments or proposals for further improvements to this document made to Maestro HongKong are highly appreciated Maestro Wireless Solutions Limited Add Unit 3603 09 36 F 118 Connaught Road West HK Main Line 852 28690688 Fax 852 25254701 support gps maestro wireless com www maestro wireless com 12 2 Related Documents e GPS Evaluation Kit EVA2135 H Maestro e Power ONOFF Sequences and Power On Reset POR on A2100 AB Maestro e SiRF OSP Reference Manual SiRF e SiRF NMEA Reference Manual SiRF 12 3 Related Tools e GPS Cockpit Maestro e SiRFLive SIRF V0 2 Sep 14 User s Manual Page 36 of 38 maestro7Y GPS receiver 13 List of Figures Fig re 1 A2135 H e E 8 Figure 2 A2135
21. ion Update Rate command e NMEA command MID103 PSRF103 00 7 00 0 22 e OSP command MID136 AO A2 00 OE 88 00 00 04 00 00 00 00 00 00 00 00 OF 02 00 9D BO B3 V0 2 Sep 14 User s Manual Page 33 of 38 N ei maestro 3 GPS receiver 10 9 Factory reset Pre loaded patch data amp EE data will be erased by factory reset Therefore it is prohibited to send this command to our ROM based module with pre loaded patch NMEA command MID 101 PSRF101 2686727 4304282 3851642 75000 225054 1775 12 8 12 lt CR gt lt LF gt 8 highlighted in red on above NMEA command is to configure a factory reset No initialization data is used Internal RAM amp SPI Flash are cleared and a factory reset is performed Please refer to NMEA reference manual for more details OSP command MID 128 AO A2 00 19 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 OC 38 00 C4 BO B3 lt CR gt lt LF gt Please refer to OSP reference manual for more details for command configuration You may need to contact Maestro for getting the pre loaded patch and patch man ager in case you erased it accidentally V0 2 Sep 14 User s Manual Page 34 of 38 maestro GPS receiver 11 Evaluation Kit EVA2135 H For demonstration and easy evaluation of GPS performance Maestro offers an evaluation kit including one GPS A2135 H module It contains a USB interface with according drivers to connect easily to a PC The USB interface is an extension o
22. l Parameter Min Max Unit TX0 WAKEUP Voh 4mA 2 6 Vcc V Vol 4mA 0 45 V RXO Vih 2 0 Vcc V Vil 0 8 V nRST For safe reset 0 2 V ON OFF Vih 1 35 Vcc V Vil 0 3 0 45 V Table 7 DC electrical characteristics V0 2 Sep 14 User s Manual Page 24 of 38 maestro GPS receiver 7 Mounting This chapter describes the suggested mounting process for the A2135 H GPS re ceiver modules In a ROHS compliant product with a ROHS compliant process it is recommended to use chemical tin as the counter part to the module s pins This will guarantee highest resistance against shocks 7 1 Proposed Footprint for Soldering The following proposal of a footprint for soldering is assuming a stencil thickness of 150um X marks the center of the through holes A2235 H 0 6 0 45 Solder paste Figure 11 Proposal of Soldering footprint Please note that copper and solder paste footprints are identical The final footprint has to be evaluated and qualified by the manufacturer according to the specific process V0 2 Sep 14 User s Manual Page 25 of 38 maestro Y GPS receiver 7 2 PCB Design Guide 1 Drill a through hole with diameter greater than or equal to 3mm in the application PCB which is underneath the RF feed point to alleviate the interference from RF signal to other part of circuitries Besides ground vias says 8 should be placed surrounding the through hole for further shielding purp
23. l current of 20 HA drawn from Vcc To wake the module up again toggling the ON_OFF pin is neces sary 200ms pulse width 10 6 Extended Ephemeris The receiver is capable of supporting two versions of using Extended Ephemeris EE data The first one is the version where the EE data are calculated on a server are transmitted to device incorporating the receiver and are then loaded into the receiver These data can be valid for up to seven days The second version is the internal extrapolation of available natural Ephemeris data This is done automatically and no external support is required The internally calcu lated EE data are valid for up to 3 days The receiver firmware will define which set of EE data to use or will neglect those in case natural data are available Both versions of EE data will help to further lower power consumption in SiRFaware mode 10 7 TM_GPIO5 pin 1 pulse per second pin The 1PPS pin is an output pin In addition to precise positioning GPS also allows for accurate timing due to the synchronized atomic clocks in the GPS satellites While the current date and time is transmitted in NMEA sentences UTC an exact and accurate timing signal is pro vided via the 1PPS pin of the A2135 H GPS receiver Under good signal conditions the 1PPS signal comes between 620ns and 710ns after the full GPS system second which is accurately around 10ns synchronized to UTC Therefore the 1 second clock can b
24. llites in view or Extended Ephemeris methods The SiRFaware mode is entered using the One Socket Protocol an extension of the SIRF Binary Protocol Please refer to the appropriate manual In order to request a fix and to exit SiRFaware it is necessary to toggle the ON OFF pin Toggling is done by pulling the signal to HIGH for about 200ms 10 4 Push to Fix Mode Push to Fix mode is designed for the application that requires infrequent position reporting The receiver generally stays in a low power mode up to 2 hours but wakes up periodically to refresh position time ephemeris data and RTC calibration The push to fix mode is initialized and entered using the SiRF Binary Protocol Please refer to the appropriate manual paying particular attention to the paragraph titled Set TricklePower Parameters In order to request a fix outside the specified duty cycles it is necessary to toggle the ON_OFF pin Toggling is done by pulling the signal to HIGH for about 200ms V0 2 Sep 14 User s Manual Page 31 of 38 maestro7Y GPS receiver 10 5 Hibernate Mode In order to enter Hibernate Mode it is necessary to send a shutdown command or to toggle to ON_OFF pin by pulling the signal to HIGH for about 200ms Starting with firmware version 4 0 1 the according command is supported in NMEA and SiRF Binary mode After a short delay the module will switch into hibernate mode The RTC will keep on running and SRAM is backed with the typica
25. maestro y GPS receiver GPS Receiver A2135 H A Description of Maestro s GPS Antenna Receiver Module A2135 H User s Manual Version 0 2 ch maestro y GPS receiver Revision History Rev Date Description 0 1 06 25 14 First release 0 2 09 18 14 Updates Serial Port Settings mm dd yy Name Date Signature Written by Happy wen 09 18 14 HW Checked by Sam Law Matthieu 09 18 14 S L M Approval by Frank Tang Calvin Yau 09 18 14 FT CY Users Manual Page 2 of 38 V0 2 Sep 14 maestro GPS receiver Disclaimer THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF MAESTRO WIRELESS SOLUTIONS LIMITED IT MAY NOT BE COPIED OR TRANSMITTED BY ANY MEANS PASSED TO OTHERS OR STORED IN ANY RETRIEVAL SYSTEM OR MEDIA WITHOUT PRIOR CONSENT OF MAESTRO OR ITS AUTHORIZED AGENTS THE INFORMATION IN THIS DOCUMENT IS TO THE BEST OF OUR KNOWLEDGE ENTIRELY CORRECT HOWEVER MAESTRO CAN NEITHER ACCEPT LIABILITY FOR ANY INACCURACIES OR THE CONSEQUENCES THEREOF NOR FOR ANY LIABILITY ARISING FROM THE USE OR APPLICATION OF ANY CIRCUIT PRODUCT OR EXAMPLE SHOWN IN THE DOCUMENT THE PRODUCT HARD AND SOFTWARE DESCRIBED IN THIS DOCUMENTATION IS NOT AUTHORIZED FOR USE IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF MAESTRO THIS DOCUMENT MAY PROVIDE LINKS TO OTHER WORLD WIDE WEB SITES OR RESOURCES BECAUSE MAESTRO HAS NO CONTROL OVER SUCH SITES AND RESOURCES MA
26. ose Figure 12 Proposal 1 of the PCB design 2 If proposal 1 is not allowed Placed a round Copper keep out region diameter 23mm on the application PCB underneath the RF feed point to alleviate the interference from RF signal to other part of circuitries Besides ground vias says 8 should be placed surrounding the through hole for further shielding purpose Figure 13 Proposal 2 of the PCB design V0 2 Sep 14 User s Manual Page 26 of 38 maestro y GPS receiver 7 3 Recommended Profile for Reflow Soldering Typical values for reflow soldering of the module in convection or IR convection ovens are as follows according to IPC JEDEC J STD 020D Parameter Value Peak temperature ROHS compliant process 245 C Average ramp up rate to peak 217 C to Peak 3 C second max Preheat temperature min 150 C max 200 C Ramp up time from min to max preheat temperature 60 120 seconds Temperature maintained above 217 C 60 150 seconds Time within 5 C of actual peak temperature 30 seconds Ramp down rate 6 C second max Time 25 C to peak temperature 8 minutes max Table 8 Reflow soldering profile A2135 H As results of soldering may vary among different soldering systems and types of solder and depend on additional factors like density and types of components on board the values above should be considered as a starting point for further optimi zation V0 2 Sep 14 User s Manual Page
27. p 14 User s Manual Page 10 of 38 maestro M GPS receiver Figure 4 A2135 H tape specifications 3 V0 2 Sep 14 User s Manual Page 11 of 38 maestro GPS receiver One complete reel holds 500 A2135 H modules There is 1 kinds of packaging for shipment One box holds 1 reel Reel diameter 38 cm Outer Box dimensions 38 8 W x 38 8 L x 5 7 H cm Gross weight 5 06 Kg Net weight 4 13 Kg V0 2 Sep 14 User s Manual Page 12 of 38 ei maestro 2 3 Additional Equipment N Ai GPS receiver EVA2135 H Evaluation Kit including one module A2135 H Table 3 Additional equipment A detailed description of the EVA2135 H Evaluation Kit can be found in the appro priate manual V0 2 Sep 14 User s Manual Page 13 of 38 maestro7Y GPS receiver 3 Quick Start In order to allow an easy and quick start with the A2135 H module this chapter provides a short overview on the important steps to be taken to receive NMEA messages with position information on a serial port UART NOTE 1 The A2135 H needs an external pull up resistor to be configured for UART operation Please consider the pull up resistor in your design or pull the GPIO up right after reset by other means NOTE 2 The ON_OFF input of the A2135 H needs to be connected to a push pull output of a microprocessor For a wake up including the initial one after power on a LOW HIGH transmission is mand
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