LR9552 GPS通信模块.pdf

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1、 i LR9552LP GPS Module ii1.INTRODUCTION.1 1.1.FEATURES.1 HARDWARE AND SOFTWARE.1 PERFORMANCE.1 INTERFACE.1 2.MODULE ARCHITECTURE.2 2.1.DIMENSIONS.3 2.2.SOFTWARE FEATURES.3 2.3.ENVIRONMENTAL SPECIFICATION.4 2.4.REFERENCE DESIGN.4 2.5.REGULATIONS COMPLIANCE.5 3.PERFORMANCE CHARACTERISTICS.7 3.1.POSITI

2、ON AND VELOCITY ACCURACY.7 3.2.DYNAMIC CONSTRAINS.7 3.3.ACQUISITION TIME 1.7 3.4.TIMING 1PPS OUTPUT.8 3.5.SENSITIVITY.8 4.HARDWARE INTERFACE POWER SUPPLY.9 4.1.SPECIFICATIONS.9 I.Pin Positions.9 II.Pin Assignment.9 5.SOFTWARE INTERFACE.10 6.MECHANICAL DRAWING AND FOOTPRINT.11 6.1.OUTLINE DRAWING.11

3、7.PACKAGE.12 7.1.PACKAGE SPECIFICATIONS.12 8.ROHS COMPLIANT INFORMATION.13 8.1.ROHS SOLDERING PROFILE.13 Reflow Profile.13 GLOSSARY.14 2006 Leadtek Research Inc.All rights reserved.Page 1/17 Preliminary Confidential-Information is subject to change without prior notice.LR9552LP Manual V021.Introduct

4、ion The Leadtek GPS 9952LP module(LR9552LP)is a high sensitivity and very compact smart antenna module,with built in GPS receiver circuit.This 20-channel global positioning system(GPS)receiver is designed for a wide range of OEM applications and is based on the fast and deep GPS signal search capabi

5、lities of SiRFStarIII architecture.Leadtek GPS 9552LP is designed to allow quick and easy integration into GPS-related applications such as:PDA,Pocket PC,and other computing devices Car and Marine Navigation Fleet Management/Asset Tracking AVL and Location-Based Services Hand-Held Device for Persona

6、l Positioning and Navigation 1.1.Features Hardware and Software Based on the high performance features of the SiRFStar III/LP single chip Compact module size for easy integration:25x25x8.9 mm(with 4 mm patch antenna)25x25x6.9 mm(with 2 mm patch antenna)option Fully automatic assembly:reflow solder a

7、ssembly ready Hardware compatible with SiRF GSW3.2 serial software Performance Cold/Warm/Hot Start Time:1/38/42 sec.Reacquisition Time:0.1 second.RF Metal Shield for best performance in noisy environments.Interface RS232 or TTL(option)level serial port for GPS communications interface Protocol:NMEA-

8、0183/SiRF Binary(default NMEA).Baud Rate:4800,19200,or 57600 baud(default 4800).2006 Leadtek Research Inc.All rights reserved.Page 2/17 Preliminary Confidential-Information is subject to change without prior notice.LR9552LP Manual V022.Module architecture RS232Transceiver25mm Patch AntennaSiRF GSC3f

9、/LP16.369MHzTCXO32.768KHzCrystal2.85 VDCregulatorvoltagedetector1.50 VDCregulator9552LP(RS232)Block Diagram5.0VDC power inbackup batterybandpassfilterLNANMEAoutput 25mm Patch AntennaSiRF GSC3f16.369MHzTCXO32.768KHzCrystal2.85 VDCregulatorvoltagedetector1.50 VDCregulatorserial IO9552(TTL)Block Diagra

10、m5.0VDC power inbackup batterybandpassfilterLNANMEAoutput 2006 Leadtek Research Inc.All rights reserved.Page 3/17 Preliminary Confidential-Information is subject to change without prior notice.LR9552LP Manual V022.1.Dimensions The Physical dimensions of the Leadtek 9552LP GPS Module are as follow:It

11、ems Description Length 25.0 0.3 mm Width 25.0 0.3 mm Height 8.90 0.3 mm 6.90 0.3 mm Weight 13.0g(w/4mm patch antenna)8.0g(w/2mm patch antenna)2.2.Software Features The Leadtek 9552LP module includes GSW3.2.,high sensitivity software solution.For SiRFStarIII/LP receivers,the default configuration is

12、as follows:Item Description Core of firmware SiRF GSW3.2 Baud rate 4800,9600,19200,38400 or 57600 bps(default 4800)Code type NMEA-0183 ASCII Datum WGS-84 Protocol message GGA(1sec),GSA(5sec),GSV(5sec),RMC(1sec),VTG(1sec)Output frequency 1 Hz 2006 Leadtek Research Inc.All rights reserved.Page 4/17 Pr

13、eliminary Confidential-Information is subject to change without prior notice.LR9552LP Manual V022.3.Environmental Specification Item Description Operating temperature rang(note)-30 deg.C to+60 deg.C Storage temperature range-30 deg.C to+65 deg.C Humidity up to 95%non-condensing or a wet bulb tempera

14、ture of+35 deg.C Altitude 18,000 meters(60,000 feet)max.Velocity 515 meters/second(1000 knots)max.Jerk 20 meters/second3,max.Acceleration 4g,max.Note:The module can be operated between-30+85degC,but higher temperature may cause internal Li backup battery deterioration that will influence the perform

15、ance of GPS hot start.2.4.Reference design The user can use a PMOS to control 9552LP power on or off as below:IRLML6402VCC 5.0 VDCTo 9552LP pin7 VCC_5VON/OFF Control 2006 Leadtek Research Inc.All rights reserved.Page 5/17 Preliminary Confidential-Information is subject to change without prior notice

16、.LR9552LP Manual V022.5.Regulations compliance RoHS:This device complies with the Restriction of Hazardous Substances(RoHS)directive that is enforced on 1st July 2006,saying all electronic products sold in the EU must with RoHS compliance.2006 Leadtek Research Inc.All rights reserved.Page 6/17 Preli

17、minary Confidential-Information is subject to change without prior notice.LR9552LP Manual V02FCC/CE:This device complies with the Federal Communications Commission(FCC),an independent United States government agency regulating interstate and international communications by radio,television,wire,sate

18、llite and cable,and CE,an European electromagnetic waves emission and immunity party,regulations.Please note that the compliances of this device are for this SMD module itself only.The complete system compliance must be examined and certified whenever you put this SMD inside.2006 Leadtek Research In

19、c.All rights reserved.Page 7/17 Preliminary Confidential-Information is subject to change without prior notice.LR9552LP Manual V023.Performance Characteristics 3.1.Position and velocity accuracy Position 10 meters,2D RMS 5 meters 2D RMS,WAAS corrected 5meters(50%).Velocity 0.1 meters/second Accuracy

20、 Time 1 microsecond synchronized to GPS time 3.2.Dynamic constrains Altitude 18,000 meters(60,000 feet)max.Velocity 515 meters/second(1000 knots)max.Acceleration 4g,max.Dynamic Conditions Jerk 20 meters/second3,max.3.3.Acquisition time 1 Mode Leadtek 9101 GPS Module TTFF Hot(valid almanac,position,t

21、ime&ephemeris)1 s TTFF Warm(valid almanac,position,&time)38 s TTFF Cold(valid almanac)42 s re-acquisition(10 s obstruction with valid almanac,position,time&ephemeris)100 ms Note 1:Open Sky and Stationary Environments.2006 Leadtek Research Inc.All rights reserved.Page 8/17 Preliminary Confidential-In

22、formation is subject to change without prior notice.LR9552LP Manual V023.4.Timing 1PPS output The 1PPS output width of the Leadtek 9552 GPS Module is 1s.3.5.Sensitivity Parameter Description Tracking Sensitivity-158 dBm Acquisition Sensitivity-142 dBm 2006 Leadtek Research Inc.All rights reserved.Pa

23、ge 9/17 Preliminary Confidential-Information is subject to change without prior notice.LR9552LP Manual V024.Hardware Interface Power supply Parameter Leadtek 9552 GPS Module Input voltage 3.2 5.0V DC input.Current(typ)at full power(3.3V)55mA Battery backup voltage 1.65 5.0V DC input.4.1.specificatio

24、ns I.Pin Positions II.Pin Assignment Pin No.Define Pin No.Define 1 GND 5 RXDB 2 TXDA 6 TIMEMARK 3 RXDA 7 VCC_5V 4 TXDB Pin7Pin 1 2006 Leadtek Research Inc.All rights reserved.Page 10/17 Preliminary Confidential-Information is subject to change without prior notice.LR9552LP Manual V025.Software inter

25、face The host serial I/O port of the modules serial data interface supports full duplex communication between the module and the user.The default serials are shown in Table 5-1.Port Protocol Description Port A NMEA 0183,9600 bps GGA,GSA,GSV,GLL,RMC,VTG Port B N/A N/A Table 5-1 Leadtek 9552LP GPS mod

26、ule default baud rates The Leadtek LR9552LP module includes GSW3 high sensitivity software solution.Features include:High tracking sensitivity High configurability 1 Hz position update rate Real-time Operating System(RTOS)friendly Capable of outputting both NMEA and SiRF-proprietary binary protocols

27、 Designed to accept custom user tasks executed on the integrated ARM7TDM1 processor Runs in full power operation or optional power saving modes GSW3 default configuration is as follows:Item Description Core of firmware GSW3.2 serial Baud rate 4800,9600,19200,38400 or 57600 bps(default 4800)Code type

28、 NMEA-0183 ASCII Datum WGS-84 Protocol message GGA(1sec),GSA(5sec),GSV(5sec),RMC(1sec),VTG(1sec)Output frequency 1 Hz 2006 Leadtek Research Inc.All rights reserved.Page 11/17 Preliminary Confidential-Information is subject to change without prior notice.LR9552LP Manual V026.Mechanical drawing and fo

29、otprint 6.1.Outline Drawing (4mm patch antenna)(2mm patch antenna)Items Description Length 25.0 0.3 mm Width 24.0 0.3 mm Height 8.90 0.3 mm 6.90 0.3 mm 2006 Leadtek Research Inc.All rights reserved.Page 12/17 Preliminary Confidential-Information is subject to change without prior notice.LR9552LP Man

30、ual V02 7.Package 7.1.Package specifications Tolerance:10mm Electric Specification:Surface impedance Relative humidity:50%Relative temperature:24 28 Bubble diameter:1cm Color:pink With SGS Test Report Dimension:90mm(W)x 55mm+50mm(L)5.5 cm 9 cm 5 cm 2006 Leadtek Research Inc.All rights reserved.Page

31、13/17 Preliminary Confidential-Information is subject to change without prior notice.LR9552LP Manual V028.RoHS compliant information By July 1,2006,all electronic products sold in the EU must be free of hazardous materials,such as lead.Leadtek is filly committed to being one of the first to introduc

32、e lead-free GPS Products while maintaining backwards compatibility and focusing on a continuously high level of product and manufacturing quality.8.1.RoHS soldering profile Reflow Profile High quality,low defect soldering requires identifying the optimum temperature profile for reflowing the solder

33、paste.To have the correct profile assures components,boards,and solder joints are not damaged and reliable solder connection is achievable.Profiles are essential for establishing and maintaining processes.You must be able to repeat the profile to achieve process consistency.The heating and cooling r

34、ise rates must be compatible with the solder paste and components.The amount of time that the assembly is exposed to certain temperatures must first be defined and then maintained.The following is an example of a typical thermal profile.2006 Leadtek Research Inc.All rights reserved.Page 14/17 Prelim

35、inary Confidential-Information is subject to change without prior notice.LR9552LP Manual V02Glossary A-GPS Assisted GPS or AGPS is a technology that uses an assistance server to cut down the time needed to find the location.Although GPS provides excellent position accuracy,position fixes require lin

36、es of sight to the satellites.In regular GPS networks there are only GPS satellites and GPS receivers.In A-GPS networks,the receiver,being limited in processing power and normally under less than ideal locations for position fixing,communicates with the assistance server that has high processing pow

37、er and access to a reference network.Although dependent on cellular coverage,AGPS processing is quicker and more efficient than regular GPS.API An application programming interface is a set of definitions of the way one piece of computer software communicates with another.One of the primary purposes

38、 of an API is to provide a set of commonly used functions,such as to draw windows or icons on the screen.Programmers can then take advantage of the API by making use of its functionality,saving them the task of programming everything from scratch.Baud Rate Is a measure of the signaling rate,which is

39、 the number of changes to the transmission media per second in a modulated signal.For Example:250 baud means that 250 signals are transmitted in one second.If each signal carries 4 bits of information then in each second 1000 bits are transmitted.This is abbreviated as 1000 bit/s.Dead Reckoning The

40、process of estimating your position by advancing a known position using course,speed,time and distance to be traveled.It is figuring out where you will be at a certain time if you hold the speed,time and course you plan to travel.Differential GPS(DGPS)An extension of the GPS system that uses land-ba

41、sed radio beacons to transmit position corrections to GPS receivers.DGPS reduces the effect of selective availability,propagation delay,etc.and can improve position accuracy to better than 10 meters.EGNOS A satellite navigation system being developed by the European Space Agency,the European Commiss

42、ion,and EUROCONTROL.It is intended to supplement the GPS and GLONASS systems by reporting on the reliability and accuracy of the signals.According to specifications,horizontal position accuracy should be better than 7 meters.In practice,the horizontal position accuracy is at the meter level.It will

43、consist of three geostationary satellites and a network of ground stations.Similar service is provided in America by the WAAS system.See WAAS.2006 Leadtek Research Inc.All rights reserved.Page 15/17 Preliminary Confidential-Information is subject to change without prior notice.LR9552LP Manual V02 Eu

44、ropean Geostationary Navigation Overlay System See EGNOS.LNA A special type of electronic amplifier or amplifier used in communication systems to amplify very weak signals captured by an antenna.It is usually located at the antenna and is a key component,which is placed at the front-end of a receive

45、r system.Low Noise Amplifier See LNA.Multi-path mitigation Anticipating errors caused when a satellite signal reaches the GPS receiver antenna by more than one path.Usually caused by one or more paths being bounced or reflected off of structures near the antenna and occurs to some extent everywhere.

46、The signal which traverses a longer path will yield a larger pseudo range estimate and increase the error.NMEA An U.S.standards committee that defines data message structure,contents,and protocols to allow the GPS receiver to communicate with other pieces of electronic equipment.National Marine Elec

47、tronics Association See NMEA.1PPS Pulse which is generated once per second.GPS and some radio clocks and related timekeeping gear have a pulse-per-second or PPS signal that is needed for high accuracy time synchronization.The PPS signal can be connected in either of two ways,either through the data

48、leads of a serial port or through the modem control leads.Either way requires conversion of the PPS signal,Most GPS devices emit an rs-232 serial stream with some kind of timestamp format.Many GPS devices are small realtime systems with the satellite tracking done at high priority,positioning done a

49、t medium priority,and time output done at low priority.The timestamps often have+-200 ms of jitter(variance in delay),and output a PPS signal on the exact second.SMD Electronic device components that are mounted directly onto the surface of printed circuit boards(PCBs).In the industry it has largely

50、 replaced the previous construction method of fitting components with wire leads into holes in the circuit board(also called through-hole technology).2006 Leadtek Research Inc.All rights reserved.Page 16/17 Preliminary Confidential-Information is subject to change without prior notice.LR9552LP Manua