Datasheet LR9805ST Datasheet (QLEADTEK)

LR9805ST

LR9805-ST

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.

Trademarks

Leadtek and the Leadtek logo are registered trademarks of Leadtek Research Inc.

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 USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENT, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Customer Support

• Visit our Web site at www.leadtek.com.tw.

• For support via e-mail, submit your question at service@leadtek.com.tw

Leadtek Research Inc. 18F, 166, Chien-Yi Rd., Chung Ho, Taipei Hsien, Taiwan (235)

Telephone: +886-(0)2 8226 5800

Fax: +886-(0)2 8226 3087

gpssales@leadtek.com.tw

gpsfae@leadtek.com.tw

Leadtek Research USA 910 Auburn Ct. Fremont, CA 94538, USA

Telephone: +510 490 8076, ext. 203

Fax: +510 490 7759

gps@leadtek.com

.

Contents

INTRODUCTION..........................................................................................................................1

FEATURES.....................................................................................................................................1

ARDWARE AND SOFTWARE .........................................................................................................1

H

ERFORMANCE ..............................................................................................................................1

P

NTERFACE ....................................................................................................................................2

I A

DVANTAGES................................................................................................................................2

EFERENCE DESIGN.......................................................................................................................3

R

SPECIFICATIONS........................................................................................................................4

TECHNICAL SPECIFICATIONS...............................................................................................4

E

NVIRONMENTAL CHARACTERISTICS............................................................................................5

HYSICAL CHARACTERISTICS ........................................................................................................5

P

NTERFACE SPECIFICATIONS ..........................................................................................................5

I

SOFTWARE...................................................................................................................................6

ELECTRICAL SPECIFICATIONS.............................................................................................7

B

LOCK DIAGRAM ..........................................................................................................................7

INTERFACE SPECIFICATION..................................................................................................7

P

HOTOS AND PIN POSITIONS..........................................................................................................7

IN SETTINGS ................................................................................................................................8

P

MECHANICAL DIMENSIONS................................................... ... .............................................9

O

UTLINE DRAWING ( UNIT : MM ) .................................................................................................9

OTTOM VIEW ( UNIT : MM ) ........................................................................................................10

B

ECOMMENDED FOOTPRINT ( UNIT : MM ) ..................................................................................11

R

AUTOMATED MANUFACTURING COMPONENTS ..........................................................11

R

EEL 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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LR9805ST GPS Module v1.51Technical Manual

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 General

Accuracy

Datum

Time to First Fix (TTFF) ( Open Sky and Stationary Environment )

Dynamic Conditions

Power

Serial Port

Time-1PPS Pulse

GSC2x Series SiRFstarII single chip technology Frequency L1, 1575.42 MHz C/A code 1.023 MHz chip rate Channels 12

Position

Velocity 0.1 meters/second

Time 1 microsecond synchronized to GPS time

Default WGS-84

Other selectable for other Datum

Reacquisition 0.1 sec., average

Hot start 4 sec., average typical TTFF

Warm start 35 sec., average typical TTFF

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.

Jerk 20 meters/second3, max.

Main power input 3.3 ± 0.3VDC input

Power consumption

Supply Current Backup Power 1.5 ± 0.1V DC input.

Electrical interface Two full duplex serial TTL interface.

Protocol messages NMEA-0183@4800 bps (Default)

Level TTL

Pulse duration 1 µs

Time reference At the pulse positive edge.

Measurement

10 meters, 2D RMS

5 meters 2D RMS, WAAS corrected

<5meters(50%), DGPS corrected

≈106 mW (continuous mode) ≈32 mA

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 Baud rate Code type Datum Protocol message Output frequency

SiRFXTrac

4800, 9600, 19200, 38400 or 57600 bps (default 4800)

NMEA-0183 ASCII

WGS-84

GGA(1sec), GSA(5sec), GSV(5sec), RMC(1sec),VTG(1sec)

1 Hz

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Electrical Specifications

Block Diagram

Interface Specification

Photos and Pin Positions

Model

Pin 28

Pin 1

Pin 15

Serial

Pin 14

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Pin Settings

PIN Name Type Description

1 REV I Reserved

2 GPIO6 I/O Reserved

3 GPIO10 I/O Reserved

4 RXDB I TTL UART Port B input. If not used, keep floating

5 RXDA I TTL UART Port A input

6 TXDA O TTL UART Port A output

7 GPIO5 I/O Reserved

8 TIMEMARK O 1 PPS timemark output

9 GPIO7 I/O Reserved

10 GPIO11 I/O Reserved

11 GPIO0 I/O Reserved

12 GPIO1 I/O Reserved

13 GPIO12 I/O Reserved

14 GND PWR Ground

15 VCC_IN PWR 3.3V supply input

16 VSTBY PWR

17 BOOTSEL1 I Pull high for programming mode. If not used, keep floating

18 PBRESN I Reset pin, active low, If not used, keep floating

19 GPIO13 I/O Reserved

20 GND PWR Ground

21 GPIO2 I/O Reserved

22 GPIO3 I/O Reserved

23 TXDB O TTL UART Port B output. If not used, keep floating

24 BOOTSEL0 I Pull low for programming mode. If not used, keep floating

25 ANTPWR PWR Antenna power input

26 GND PWR Ground

27 RFIN I RF Signal input

28 GND PWR Ground

Apply 1.5V DC for backup RTC & SRAM. If not used, keep floating

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Mechanical Dimensions

Outline Drawing Tolerance:

Length 24.0 ± 0.4 mm Width 20.0 ± 0.1 mm Height 2.90 ± 0.1 mm

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Bottom view ( unit : mm )

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Recommended Footprint ( Unit : mm )

Automated Manufacturing Components

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Reel Taping Specification

• Material: Black Conductive High Impact Polystyrene Alloy (UP-6100)

• Surface resistivity 10

• Quantity per reel: 1000 pcs./reel

Tape Reel Drawing ( Unit: mm )

9

– 1012 Ω/□

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Polystyrene Alloy Taping Specifications

10 sprocket hole pitch cumulative tolerance ±0.20mm Carrier camber is within 1mm in 250mm A0 and B0 measured on a plane 0.3mm above the bottom of the pocket K0 measured from a plane on the inside bottom of the pocket to the top surface of the carrier Material: black anti-static polystyrene alloy All dimensions meet EIA-481-3 requirements Thickness: 0.50±0.05cm Packing length per 22” reel: 50.0 Meters (1:2) Component load per 15” reel: 1000 pcs. (SUR-56-3-XL)

Polystyrene Alloy Taping Drawing

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Reflow Profile

High quality, low defect soldering requires identifying the optimum temperature profile for reflowing the solder 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 rise 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.

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Ordering Information

For every order of 1000 pcs , Leadtek will ship the modules with the reel package (shown on page 15).

For order quantities less than 1000 pcs, or when ordering non-whole numbers, Leadtek will snip the

taping and ship the quantity that you request without the reel.

To place an order, please contact gpssales@leadtek.com.tw

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LR9805ST GPS Module v1.51Technical Manual

Glossary

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 lines 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 power

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 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 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.

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Dead Reckoning

The 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-based 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 (European Geostationary Navigation Overlay System)

A satellite navigation system being developed by the European Space Agency, the European

Commission, 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 consist of three geostationary satellites and a network of ground stations.

Similar service is provided in America by the WAAS system. See WAAS.

LNA (Low Noise Amplifier)

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 receiver system.

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. The signal which traverses a longer path will yield a

larger pseudo range estimate and increase the error.

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NMEA (National Marine Electronics Association)

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.

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 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 at

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 (Surface Mount Device)

Electronic device components that are mounted directly onto the surface of printed circuit boards

(PCBs). In the industry it has largely replaced the previous construction method of fitting components

with wire leads into holes in the circuit board (also called through-hole technology).

TCXO (Temperature Controlled Crystal Oscillator)

An electronic device that uses the mechanical resonance of a physical crystal to create an electrical

signal with a very precise frequency and can be embedded in integrated circuits. TCXO reduces the

environmental changes of temperature, humidity, and vibration, to keep a stable output frequency.

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LR9805ST GPS Module v1.51Technical Manual

Time To First Fix (TTFF)

The time it takes a GPS receiver to find satellites after you first turn it on, when the GPS receiver has

lost memory, or has been moved over 300 miles from its last location. Standard TTFF Timing consists

of:

Mode Requires Timing

Snap Start Hot + Clock + Sat Pos 3 minutes off

Hot Start Warm + Ephemeris 30 minutes off

Position Accuracy

Warm Start

Cold Start Nothing N/A

Specifications are typical times assuming good satellite visibility and above threshold signal strengths.

WAAS (Wide Area Augmentation System)

Time Accuracy Almanac

<500 KM <2 hours <1 year

A system of satellites and ground stations that provide GPS signal corrections for better position

accuracy. A WAAS-capable receiver can give you a position accuracy of better than three meters, 95

percent of the time. (At this time, the system is still in the development stage and is not fully

operational.) WAAS consists of approximately 25 ground reference stations positioned across the

United States that monitor GPS satellite data. Two master stations, located on either coast, collect data

from the reference stations and create a GPS correction message.

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Leadtek Research Inc. 18F, 166, Chien-Yi Rd., Chung Ho, Taipei Hsien, Taiwan (235)

Version 1.51 5/09/06

Datasheet LR9805ST Datasheet (QLEADTEK)

Specifications and Main Features

Frequently Asked Questions

User Manual