GPS Receiver A2235-H
Contents
1. Table 9 Reflow soldering profile A2235 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 V1 1 Oct 13 User s Manual Page 27 of 37 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 ij Solder pads n Solder pads Figure 14 Antenna connector strip line A2235 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 C strip line Tm H GND Figure 15 Strip line parameters A2235 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 V1 1 Oct 13 User s Manual Page 28 of 372. maestro 5 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 recommendations 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 V1 1 Oct 13 User s Manual Page 29 of 37 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 10 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
3. Fig re 1552235 Ee E 8 Figure 2 A2235 H tape specifications 7 10 Figure 3 A2235 H tape specifications 2 11 Figure 4 A2235 H tape specifications 3 11 Figure 5 Minimum configuration A2235 H o eene renes 14 Figure 6 RS232 level shifter for minimum configurations ssssseeeesesssesrrrerrreeeen 15 Figure 7 Self start configuration AZ22D H 16 Figure 8 Mechanical outline component side A222pH 18 Figure 9 Mechanical outline solder side A222p H 19 Figure 10 Pin out information top view A2235 H ssssssseeesses 20 Figure 11 Proposal of Soldering footprint 25 Figure 12 Proposal 1 of the e EE 26 Figure 13 Proposal 2 of the PCB design ege tenere tene tiene vitenslentienne 26 Figure 14 Antenna connector strip line A2235 H sssssssssessssssssssrrrnnrnesserrrrrnnnreeeees 28 Figure 15 Strip line parameters AZ232p H REENEN 28 Figure 16 1PPS waveform reierencel EE 33 Figure 17 Evaluation kit EVAZZ3RH ees 34 V1 1 Oct 13 User s Manual Page 36 of 37 maestro GPS receiver 14 List of Tables Table 1 A2235 H GPS characteristic eicere ito scaveeesssevsceeseneeteesavesauens 9 Table 2 A2235 H dimensions and weight 9 Table 3 Additional eoupment ee 13 Table 4 GPIO 0 and GPIO 1 Settings ueste retia ctun tectum ease 17 Table 5 Pin d scripion A2235 H ME 22 Table 6 A2235 H electrical characteristics en 23 Table 7 Absolute maximum ratings ssssssseee
4. DC CLK I2C mode 15 GPIO4 Input External interrupt input pin reserved for future use leave open 16 TM_GPIO5 Output Time Mark 1PPS signal 17 GPIO 1 Input Output Configuration pin for the baud rate 2 2K to 1 8V for the baud rate 4800 bps see also Configure the baud rate DC CLK DC clock output to MEMS interface 18 GPIO 0 Input Output Configuration pin for the baud rate 2 2K to 1 8V for the baud rate 4800 bps see also Configure the baud rate l2C DIO 12C I O to MEMS interface 19 ON OFF Input Connect to push pull output This is mandatory Set to LOW by default Toggle to HIGH and back to LOW for first start up after power on gt to request a fix in SiRFaware or PTF mode to go into or wake up out of hibernate mode Connect it to WAKEUP pin for self start mode V1 1 Oct 13 User s Manual Page 21 of 37 maestro 5 GPS receiver 20 Extint Input Interrupt input for MEMS interface If Extlnt 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 Extlnt pin 21 TXO Output Serial output 0 NMEA out if configured for UART SPI DO SPI data out pin when module works in SPI mode 22 RXO 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 I O pin when module works in hist port DC DIO DC mo
5. Pull high Pull low NMEA 9600 Pull low Pull high NMEA 38400 Pull low Pull low OSP 115200 Remark Pull high low 2 2K Table 4 GPIO 0 and GPIO 1 Settings Note This feature is not available if any MEMS or non volatile memory devices are attached to the auxiliary serial bus The internal software default baud rate is NMEA 4800 when an EEPROM is connected V1 1 Oct 13 User s Manual Page 17 of 37 maestro 3 GPS receiver g 4 Mechanical Outline 4 1 Details Component Side A2235 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 A2235 H V1 1 Oct 13 User s Manual Page 18 of 37 maestro GPS receiver 4 2 Details Solder Side A2235 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 A2235 H V1 1 Oct 13 User s Manual Page 19 of 37 5 Pin out Information 5 1 Layout A2235 H maestro GPS receiver nRST 1 22 RXO NC GPIO3 2 gt 21 TXO Vcc 3 3V 3 20 Extint WAKEUP 4 gt 19 ON OFF Vout 5 gt 18 12C DIO GND 6 gt 17 12C CLK Oe 16 TM GPIO5 15 GPIO4 c 14 Host port I2C_ CLK c 13 NC GPIO2 GPIO6 7 gt 12 ANT SW GPIO7 8 gt 11 VANT GND 9 10 ANT EXT Figure 10 Pin out information top
6. 37 maestro 5 GPS receiver 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 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 typical current of 20 yA 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 d
7. Basic qualification tests e MSL Classification according to J STD 020C MSL3 245 C Refer to report SZRL201 1110048 e MSL Rework Compatibility according to J STD 020C Refer to report SZRL2011110048 Temperature Cycling 40 C 85 C Temperature Humidity Bias 70 C 8596 RH Low High Temperature Operating 40 C 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 V1 1 Oct 13 User s Manual Page 30 of 37 a maestro 3 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 and Power On Reset POR The A2235 H modules require an orderly shutdown process to properly stop internal operation and complete any writes of critical data to BBRAM or EEPROM data area Abrupt removal or drop of main
8. Connection of RF Signal ssssssssssssesseseeeeeeeeeeeeeeeere nennen 28 8 2 Exteiial EE 29 8 2 1 Recommended Parameters cccsceesecccceecceceeesssseceeeceeeeeeseeseeceeeeeseeeaeeaeaeeeeeeeeeesaas 29 8 2 2 IIEEMR T 29 V1 1 Oct 13 User s Manual Page 4 of 37 maestro 5 GPS receiver 9 Quality RETTEN A 30 9 1 Environmental Conditions Loads exa ada ada aar a a a d a a as aa 30 9 2 Product Qualification in seco cooker citm coco c rx a ca cce eec cn oec ncs e 30 9 3 Produclichi Tess ce npedesau pecias enean aa ect esu cd erem 30 10 Applications and Hinls riieita ta asa than aa oto nan aac aav o Dl4kRo uu 0821 Es a SEE rM Roos i nnmnnn 31 10 1 Initial Module Start EEN 31 10 2 Proper Shutdown and Power On Reset DOP 31 10 3 SiRFaware Support ccccccccccesesececsseseseseseseseseseseseseseseseneseseseeeetatssstetstenens 31 10 4 Push to Fix ee EE 31 10 5 Aibernat le E 32 10 6 Extended EphemeriS EEN 32 10 7 TM_GPIO5 pin 1 pulse per second pm 32 10 8 5 Hz Navigation Update Fate ru t metet ne dae tmn EENEG 33 11 Evaluation Kit EVA2235 HL iiiiiiuiei itas censuras oaska Quas raza a k ra ERE E ar RRR CER aaa GERE SFR EE RRa 34 12 Related Information coss en 35 DUA OAC NERONE do 12 2 Related Documents sescenti d c cnc 35 12 3 Related Re a5 13 BT EE 36 14 LISEOF TAOS E 37 V1 1 Oct 13 User s Manual Page 5 of 37 maestro 3 GP
9. GPS receiver modules GPS antenna receiver module and telematics units are RoHS compliant V1 1 Oct 13 User s Manual Page 7 of 37 maestro 5 GPS receiver 1 4 Label The A2235 H label size 12 0x 4 0 mm contains the following information A2235 H paws yy assembly year A2235 H pws xxx ERES ww assembly week 00000 2 Ec 000705 xxxxxx serial number 1320 General description Example Figure 1 A2235 H label The label is placed on the side of the GPS antenna The data matrix code holds the product type part number software 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 Software 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 A2235H 9333 01 01 1211 000005 Meaning TF Given Given Given Given Year 12 Increment Week 11 from 000001 up to 999999 Example of MID TFA2235H93330101 1211000005 V1 1 Oct 13 User s Manual Page 8 of 37 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 40
10. 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 MAESTRO 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 V1 1 Oct 13 User s Manual Page 3 of 37 N maestro 3 GPS receiver Table of Contents N T ee iilo iei EE 6 1 1 AUR YG eege 6 TT 7 1 3 RoHS and Lead Free Information EE 7 Ta IA tee To T m 8 1 5 Characteristics E 9 1 5 1 GPS Charachertetce nennen nnns nnne ss nnna innen nnns 9 1 5 2 Mechanical Characteristics ccccccccssssseseceeeeeeeeeaeeeseeceeeeeeeeeseeseeceeeeeseesaseaegeeeeeess 9 1 5 Handling Precautions E 9 2 Ordering Info
11. power while the system is running has risks ranging from minor impact on TTFF to fatal permanent corruption of EEPROM code area on the module Please refer to Power ONOFF Sequences and Power On Reset POR on A2100 AB Application Notes A controlled and orderly shutdown while the A2235 H is running in full power mode can be initiated by e A 200ms pulse on the ON OFF pin e According 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 satellites 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 V1 1 Oct 13 User s Manual Page 31 of
12. view A2235 H V1 1 Oct 13 User s Manual Page 20 of 37 maestro 3 GPS receiver 5 2 Description A2235 H Signals Pin Symbol Function Description 1 nRST Input Reset input active low 2 GPIO3 None Leave open 3 VCC3V3 Power Supply 3 0 3 6 V DC 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 Input Host port 12C clock pin when module works in host port
13. 0 000 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 0 15 theoretical minimum values 1s values in real world may differ 2935s Cold 38s Table 1 A2235 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 A2235 H Mechanical dimensions Length 17 78x0 20 mm 0 750 008 Width 16 5140 20 mm 0 65 0 008 Height 7 11 mm 0 28 Max A2235 H Weight 4 0 g 0 14 oz Table 2 A2235 H dimensions and weight 1 6 Handling Precautions The GPS receiver module A2235 H is sensitive to electrostatic discharge ESD Please handle with appropriate care V1 1 Oct 13 User s Manual Page 9 of 37 maestro GPS receiver 2 Ordering Information 2 1 GPS Receiver A2235 H The order number is built as follows e A2235 Hxxxx A2235 H is the model name The xxxx refers to the current part number on the module 2 2 Packing The A2235 H GPS modules come in a tape and reel packag
14. H Operating voltage 3V3 No internal EEPROM but support external EEPROM through DC interface 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 Build in LNA with close to 20dB gain V1 1 Oct 13 User s Manual Page 6 of 37 maestro 5 GPS receiver 1 2 Characteristics Overview The module s most important characteristics are Operable at 3 3V 22mA 1fix per second UART interface at CMOS level 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 HF switch to select between antennas The antenna receiver module is available as an off the shelf component 10096 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
15. S receiver 1 Introduction A2235 H is an antenna module with SiRF Star IV ROM based chip and an on board patch antenna 15mm x 15mm x 4mm It is cost down version of A2035 H with re duced size and stacked up antenna architecture RF switch was implemented but NOT on engineering samples so as to support external active antenna for perfor mance enhancement if required In order to have an easier migration for existing customers using A2035 H we decided to keep same pin assignment as that of A2035 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 spe cial PCB design is required on user s application Receiver part of A2235 H is fully identical to A2200 A with latest CSR Premier ROM 9333 and enabling 12C host port Host Port DC CLK Pin 14 was added for this new function The A2235 H is a module designed for a 3 3V environment 1 1 Feature Overview The A2235 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 48track 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
16. a PC The USB interface is an extension of 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 EVA2235 H For further information please contact Maestro V1 1 Oct 13 User s Manual Page 34 of 37 N 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 2maestro wireless com www maestro wireless com 12 2 Related Documents e GPS Evaluation Kit EVA2235 H Maestro Power ONOFF Sequences and Power On Reset POR on A2100 AB Maestro e DIE OSP Reference Manual SiRF e SIRF NMEA Reference Manual SiRF 12 3 Related Tools e GPS Cockpit Maestro e SiRFLive SIRF V1 1 Oct 13 User s Manual Page 35 of 37 maestro 5 GPS receiver 13 List of Figures
17. ays The receiver firmware will define which set of EE data to use or will neglect those in case natural data are available need add an external EEPROM part Both ver sions of EE data will help to further lower power consumption in SiRFaware mode 10 7 TM GPIOS 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 A2235 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 be derived and maintained within around 90ns under good signal conditions Note The 1PPS clock accuracy directly depends on the position accuracy V1 1 Oct 13 User s Manual Page 32 of 37 a maestro 3 GPS receiver 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 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 receiv
18. de Table 5 Pin description A2235 H V1 1 Oct 13 User s Manual Page 22 of 37 6 Electrical Characteristics 6 1 Operating Conditions maestro 7 N GPS receiver Pin Description Min Typical Max 3 Vcc 3 0V 3 3V 3 6V Full power mode Searching Peak Current 1 42mA Full power mode Searching Average Current 2 36mA Full power mode Tracking Average Current 3 22mA TricklePower Mode 7 2mA Push to Fix Mode 0 9mA Micro Power Mode SiRFaware 29uA Hibernate Status 27uA Table 6 A2235 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 Remark Test data based on ES sample 6 2 Absolute Maximum Ratings Symbol Parameter Min Max Unit Vcc Power supply 0 3 446 V Vin Voltage to I O pin 0 3 3 6 V lov Input current on any pin 10 10 mA Itdv Absolute sum of all input currents during overload condition 200 mA Tst Storage temperature 40 85 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 i
19. e suitable for pick and place machines A Pi za _ Fo OO OO 6 gt 46 666666 OS G I D a H Fi Y al el A a I 6 PAS SSAEL LLP EORSS 1540 1 m 10xP0 40 0 2 Figure 2 A2235 H tape specifications 1 V1 1 Oct 13 User s Manual Page 10 of 37 maestro GPS receiver Figure 4 A2235 H tape specifications 3 V1 1 Oct 13 User s Manual Page 11 of 37 maestro GPS receiver One complete reel holds 500 TBC A2235 H modules There are 2 kinds of packaging for shipment TBC A 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 B One box holds 2 reels Reel diameter 38 cm Outer box dimensions 38 W x 38 L x 12 3 H cm Gross weight 10 03 Kg Net weight 8 26 Kg V1 1 Oct 13 User s Manual Page 12 of 37 maestro 2 3 Additional Equipment NN Ai GPS receiver EVA2235 H Evaluation Kit including one module A2235 H Table 3 Additional equipment A detailed description of the EVA2235 H Evaluation Kit can be found in the appro priate manual V1 1 Oct 13 User s Manual Page 13 of 37 maestro y GPS receiver 3 Quick Start In order to allow an easy and quick start with the A2235 H module this chapter provides a short overview on the important steps to be taken to receive NMEA messages with position i
20. eater 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 purpose V1 1 Oct 13 User s Manual Page 25 of 37 maestro 5 GPS receiver 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 V1 1 Oct 13 User s Manual Page 26 of 37 maestro 5 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
21. eatures of the SiRFstarlV ROM chip set 3 5 Self start configuration In order to minimize the GPIO required for operating A2235 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 nRST RXO SPI Dl Host Port l2C DIO NC GPIO3 TXO SPI DO VCC_3V3 Extint GPIO8 WAKEUP ON_OFF Vout 12C DIO GND 12C CLK TM_GPIO5 GPIO4 Host Port l2C_CLK GPIO6 SPI CLK GPIO7 SPI C Figure 7 Self start configuration A2235 H V1 1 Oct 13 User s Manual Page 16 of 37 maestro y N GPS receiver For self start mode full power operation will be activated once Vcc applied No power saving mode PTF MPM Hibernation will be supported While using external EEPROM or SPI Flash power supervision chip Maxim MAX809SEUR T is mandatory in order to prevent any memory corruption if the Vcc removes abruptly 3 6 Configure the baud rate Baud rate and protocol selection can be set upon start up through GPIO configura tion A2235 H can be configured to output NMEA at standard baud rates if the A2235 H is using the UART host interface Table 4 lists the settings for GPIO 0 and GPIO 1 to configure the baud rate at start up After start up the GPIOs can be used for other purposes GPIO 0 I2C DIO GPIO 1 I2C_CLK Protocol Baud Rate Pull high Pull high NMEA 4800
22. er 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 Tek PL Stop M Pos 60 00ms n j aes ES i x os ES Ll L Jenene CH1 200m M 500ms CH1 Z 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 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 Navigation Update Rate command e NMEA command MID103 PSRF103 00 7 00 0 22 OSP command MID136 A0 A2 00 OE 88 00 00 04 00 00 00 00 00 00 00 00 OF 02 00 9D BO B3 V1 1 Oct 13 User s Manual Page 33 of 37 maestro GPS receiver 11 Evaluation Kit EVA2235 H For demonstration and easy evaluation of GPS performance Maestro offers an evaluation kit including one GPS A2235 H module It contains a USB interface with according drivers to connect easily to
23. maestro 5 GPS receiver GPS Receiver A2235 H A Description of Maestro s GPS Antenna Receiver Module A2235 H User s Manual Version 1 1 maestro GPS receiver Revision History Rev Date Description 0 1 08 15 12 First release 0 2 04 19 13 1 Update DC interface description 2 Update Pin information 3 Add self start description 4 Add External Antenna description 0 9 05 08 13 1 Version updated 2 Add section 6 1 remark 08 15 13 Update Pin information and Table 6 current consumption data 10 16 13 Update Pin information and Mechanical outline solder side wb wesch alo A2235 H mm dd yy Name Date Signature Written by Happy wen 10 16 13 HW Checked by Sam Law Matthieu 10 16 13 S L M Approval by Frank Tang Calvin Yau 10 16 13 FT CY V1 1 Oct 13 User s Manual Page 2 of 37 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
24. n the operational sections of this specification is not implied Exposure to absolute maximum rating Table 7 Absolute maximum ratings conditions for extended periods may affect device reliability V1 1 Oct 13 User s Manual Page 23 of 37 maestro 5 GPS receiver 6 3 DC Electrical Characteristics Symbol 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 8 DC electrical characteristics V1 1 Oct 13 User s Manual Page 24 of 37 maestro 5 GPS receiver 7 Mounting This chapter describes the suggested mounting process for the A2235 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 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 7 2 PCB Design Guide 1 Drill a through hole with diameter gr
25. neesseeeeerrrtrtresserrrrrrnnnnnnsrtrrtnnnnneneeent 23 Table 8 DC electrical characteristics EE 24 Table 9 Reflow soldering profile A223pH 27 Table 10 Environmental CODGITOfIS sunt xe to nene Eo R cu x eh bx ue exe ke dai 30 V1 1 Oct 13 User s Manual Page 37 of 37
26. nformation on a serial port UART NOTE 1 The A2235 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 A2235 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 mandatory NOTE 3 It is recommended to connect the nRST pin of the A2235 H to an open collector open drain output of a microprocessor NOTE 4 The A2235 H needs two external pull up resistors to be configured for the Baud rate 4800 Please consider the pull up resistor in your design 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 A2235 H A2235 H nRST RXO SPI Dl Host Port DC DIO NC GPIO3 TXO SPI DO VCC_3V3 ExtInt GPIO8 WAKEUP ON OFF Vout I2C DIO GND 12C CLK TM GPIO5 GPIO4 Host Port DC CLK GPIO6 SPI C GPIO7 SPI C GND Figure 5 Minimum configuration A2235 H V1 1 Oct 13 User s Manual Page 14 of 37 maestro y GPS receiver 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 e External antenna input impedance is 50 Q Match as close as pos
27. rmation nera nona ta tun ra nhan nisu uuu raa tuna caua o Ch Yao gau iru aaa 10 2 1 GPS Receiver e ME 10 2 2 Packing scita onto Oen Lou Mat dpt tee 10 2 3 Additional EgHIDITIGIIL EEN 13 3 Quick e DITE 14 3 1 Minimum Configuration acne deren me emen mcsmeisendicecn nna 14 EX qu a EEN 16 3 3 ERSTEN m 16 3 4 Improved TIFF EE 16 3 5 Self start config ratior E 16 3 6 Configure the baud rate e 17 4 Mechanical Outline ccccesseeeeceeesseeeeeensseeenecenseeeeeeanseeeseonseeeeeoenseeeseoensees 18 4 1 Details Component Side A2235 H sssssssssseennn 18 4 2 Details Solder Side A2235 H wvcicssssscssssssisceccctssascccedesasectessssesdeesnscidencseestanescnans 19 5 Pin out Infor mallOpi ss sis xvinaskttcusueE puis buVEERku uet xcu tu wd Rv CRR V UN UN CE Ca MU eege 20 5 Layout A2235 H EE 20 5 2 Description A2235 H Signals EE 21 6 Electrical Characteristics e eese eeeeee eene nennen nennen nnn nnns 23 6 1 Seu eto eie NND 23 6 2 Absolute Maximum Ratings EEN 23 6 3 DG Electrical Characternsfios usc de d Cx E tr edid ER RS LER ca LR CR E 24 r i 25 7 1 Proposed Footprint for Soldering AEN 25 7 2 PCB Design Guide Mw 25 7 3 Recommended Profile for Reflow Soldering ccccceeeeeeeeeeeeteeeeeeeeeeeeeeee 27 8 Use of External ANntenina cccccccessseeecceesseeeeeesnseeeeeesseeeneeaaseeeseonsseeeseeeneees 28 8 1
28. sible e Maximum allowed external antenna current is 50 mA Consider a current li miter 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 V1 1 Oct 13 User s Manual Page 15 of 37 maestro GPS receiver 3 2 Antenna Although the A2235 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 2Description A2235 H Signals It is recommended to use an active GPS antenna with supply voltage of 3 to 5 VDC and a current draw of 50 mA maximum The quality of the GPS antenna chosen is off great 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 The default configuration within the custom specific GPS firmware is 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 f
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