Leadtek LR9805ST User manual

LR9805-ST
GPS Module
LR9805ST
GPS Module

Copyright
©2006 Leadtek Research Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval
system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise,
without the prior written consent of Leadtek Research Inc.
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All other trademarks are the property of their respective owners.
Changes
The material in this document is for information only and is subject to change without notice. While reasonable efforts
have been made in the preparation of this document to assure its accuracy, Leadtek Research assumes no liability
resulting from errors or omissions in this document, or from the use of the information contained herein.
Leadtek reserves the right to make changes in the product design without reservation and without notification to its
users.
THE DOCUMENT IS PROVIDED BY LEADTEK "AS IS", AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL LEADTEK BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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POSSIBILITY OF SUCH DAMAGE.
Customer Support
•Visit our Web site at www.leadtek.com.tw.
•For support via e-mail, submit your question at [email protected].
Leadtek Research Inc. 18F, 166, Chien-Yi Rd., Chung Ho, Taipei Hsien, Taiwan (235)
Telephone: [phone]
Fax: [phone]
[email protected]
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Leadtek Research USA 910 Auburn Ct. Fremont, CA 94538, USA
Telephone: [phone], ext. 203
Fax: [phone]
[email protected]

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Contents
INTRODUCTION..........................................................................................................................1
FEATURES.....................................................................................................................................1
HARDWARE AND SOFTWARE .........................................................................................................1
PERFORMANCE ..............................................................................................................................1
INTERFACE ....................................................................................................................................2
ADVANTAGES................................................................................................................................2
REFERENCE DESIGN.......................................................................................................................3
SPECIFICATIONS........................................................................................................................4
TECHNICAL SPECIFICATIONS...............................................................................................4
ENVIRONMENTAL CHARACTERISTICS............................................................................................5
PHYSICAL CHARACTERISTICS........................................................................................................5
INTERFACE SPECIFICATIONS..........................................................................................................5
SOFTWARE...................................................................................................................................6
ELECTRICAL SPECIFICATIONS.............................................................................................7
BLOCK DIAGRAM ..........................................................................................................................7
INTERFACE SPECIFICATION..................................................................................................7
PHOTOS AND PIN POSITIONS..........................................................................................................7
PIN SETTINGS ................................................................................................................................8
MECHANICAL DIMENSIONS...................................................................................................9
OUTLINE DRAWING (UNIT :MM ) .................................................................................................9
BOTTOM VIEW (UNIT :MM ) ........................................................................................................10
RECOMMENDED FOOTPRINT (UNIT :MM ) ..................................................................................11
AUTOMATED MANUFACTURING COMPONENTS..........................................................11
REEL TAPING SPECIFICATION......................................................................................................12
Tape Reel Drawing ( Unit: mm )............................................................................................12
Polystyrene Alloy Taping Specifications................................................................................13
Polystyrene Alloy Taping Drawing........................................................................................13
REFLOW PROFILE ...................................................................................................................14
ORDERING INFORMATION...................................................................................................15
GLOSSARY..................................................................................................................................16

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Introduction
The Leadtek LR9805ST GPS module is a high sensitivity, low power, Surface Mount Device (SMD).
This 12-channel global positioning system (GPS) receiver is designed for a broad spectrum of OEM
applications and is based on the fast and deep GPS signal search capabilities of SiRFstarII™ single
chipset. As the single chip version of the LR9805T, The LR9805ST is pin-to-pin compatible with the
LR9805-T for easier and faster transition.
The LR9805ST 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 Personal Positioning and Navigation
Features
Hardware and Software
•Based on the high performance features of the SiRFstarII single chipset
•Compact module size for easy integration: 24x20x2.9 mm (0.94x0.79x0.11 in)
•Fully automatic assembly: reflow solder assembly ready
•Hardware compatible with SiRFXTrac software
•Multiple I/O pins reserved for customizing special user applications
•RoHS compliance
Performance
•Cold/Warm/Hot Start Time: 45/35/4 sec at open sky and stationary environments
•Reacquisition Time: 0.1 second
•RF Metal Shield for best performance in noisy environments
•Multi-path Mitigation Hardware

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Interface
•TTL level serial port for GPS communications interface
•Protocol: NMEA-0183 / SiRF Binary (default NMEA)
•Baud Rate: 4800, 9600, 19200, 38400 or 57600 bps (default 4800)
Advantages
•Ideal for high volume mass production(Taping reel package)
•Cost saving through elimination of RF and board to board digital connectors
•Flexible and cost effective hardware design for different application needs
•Secure SMD PCB mounting method

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Reference design
All ground pads attach directly to ground plane by way of via.
All components are reference only.

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Specifications
Technical Specifications
Feature Item Description
Chipset GSC2x Series SiRFstarII single chip technology
Frequency L1, 1575.42 MHz
C/A code 1.023 MHz chip rate
General
Channels 12
10 meters, 2D RMS
5 meters 2D RMS, WAAS corrected
Position
<5meters(50%), DGPS corrected
Velocity 0.1 meters/second
Accuracy
Time 1 microsecond synchronized to GPS time
Default WGS-84
Datum
Other selectable for other Datum
Reacquisition 0.1 sec., average
Hot start 4 sec., average typical TTFF
Warm start 35 sec., average typical TTFF
Time to First Fix (TTFF)
( Open Sky and
Stationary Environment )
Cold start 45 sec., average typical TTFF
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.
Main power input 3.3 ± 0.3VDC input
Power consumption ≈106 mW (continuous mode)
Supply Current ≈32 mA
Power
Backup Power 1.5 ± 0.1V DC input.
Electrical interface Two full duplex serial TTL interface.
Serial Port
Protocol messages NMEA-0183@4800 bps (Default)
Level TTL
Pulse duration 1 µs
Time reference At the pulse positive edge.
Time-1PPS Pulse
Measurement Aligned to GPS second, ±1 microsecond

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Environmental Characteristics
Items Description
Operating temperature range -40 deg. C to +85 deg. C
Storage temperature range -55 deg. C to +100 deg. C
Physical Characteristics
Items Description
Length 24 mm (0.94in)
Width 20 mm (0.79 in)
Height 2.9 mm (0.11 in)
Weight 2.5g
Interface Specifications
Items Description
I/O 28 pin SMD micro package

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Software
The Leadtek LR9805ST module includes SiRFXTrac high sensitivity software solution.
Features include:
•High tracking sensitivity (-154 dBm)
•High configurability
•1 Hz position update rate
•Real-time Operating System (RTOS) friendly
•Capable of outputting both NMEA and SiRF-proprietary binary protocols
•Designed to accept custom user tasks executed on the integrated ARM7TDM1 processor
•Runs in full power operation or optional power saving modes
SiRFXTrac default configuration is as follows:
Item Description
Core of firmware SiRFXTrac
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

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Electrical Specifications
Block Diagram
Interface Specification
Photos and Pin Positions
Pin 15
Pin 28
Pin 1 Pin 14
Serial
Model