EverMore EB-N701 User Manual

EB-N701 User’s Manual

EB-N701

GPS Engine Board Receiver

User’ s Manual

EverMore Technology Inc.

EverMore Technology Inc.

2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw

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EB-N701 User’s Manual

Manual Revision History

Revision Date Update Summary

Issue 1.0 June 2005 Initial release
Issue 1.1 September 2005 Modify Page 6

© EverMore Technology Inc. All rights reserved.
Not to be reproduced in whole or part for any purpose without written permission of EverMore Technology Inc.
Information provided by EverMore Technology Inc. is believed to be accurate and reliable. However, no
responsibility is assumed by EverMore Technology Inc. for its use. EverMore Technology Inc. reserves the right to
change specification at any time without notice.

EverMore Technology Inc.

2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw

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EB-N701 User’s Manual

Contents

1. INTRODUCTION............................................................................................... 5

1.1 Overview .............................................................................................................................5

1.2 Features...............................................................................................................................6

1.3 Applications.........................................................................................................................6

1.4 Start-up Modes...................................................................................................................7

2. TECHNICAL SPECIFICATIONS................................................................... 8

2.1 Electrical Characteristics ..................................................................................................8

2.2 Environmental Characteristics.........................................................................................9

2.3 Physical Characteristics..................................................................................................... 9

2.4 Other Electrical Specifications........................................................................................10

3. HARDWARE INTERFACE ............................................................................11

3.1 EB-N701 Real Picture...................................................................................................... 11

3.2 EB-N701 Mechanical Dimensions...................................................................................12

3.3 EB-N701 Serial Interface.................................................................................................13

3.4 EB-N701 Debug Interface................................................................................................ 14

3.5 EB-N701 Reference Design.............................................................................................. 15

3.5.1 Lithium Battery..............................................................................................................15

3.5.2 Nimh Battery..................................................................................................................16

4. OPERATION AND TEST .............................................................................. 17

EverMore Technology Inc.

2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw

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EB-N701 User’s Manual

5. SOFTWARE SPECIFICATION.................................................................... 18

5.1 EB-N701 NMEA Protocol................................................................................................ 18

5.2 General NMEA Format................................................................................................... 18

5.3 $GPGGA...........................................................................................................................19

5.4 $GPGLL............................................................................................................................ 20

5.5 $GPGSA............................................................................................................................20

5.6 $GPGSV............................................................................................................................21

5.7 $GPRMC...........................................................................................................................22

5.8 $GPVTG............................................................................................................................ 22

5.9 $GPZDA............................................................................................................................23

6. LIMITED WARRANTY................................................................................... 23

7. SERIES PRODUCTS INFORMATION....................................................... 24

8. APPENDIX........................................................................................................ 24

EverMore Technology Inc.

2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw

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EB-N701 User’s Manual

1. Introduction

1.1 Overview

EverMore series GPS module EB-N701 is a high sensitivity ultra low power consumption cost
efficient, compact size; plug & play GPS module board designed for a broad spectrum of OEM system
applications. This product is based on the proven technology found in 16 channel GPS receivers and
NEMERIX chipset solution. The GPS module receiver will track up to 16 satellites at a time while
providing fast time-to-first-fix and 1Hz navigation updates. It is far reaching capability meets the
sensitivity & accuracy requirements of car navigation as well as other location-based applications,
such as AVL system. Handheld navigator, PDA, pocket PC, or any battery operated navigation system.

The EB-N701 design utilizes the latest surface mount technology and high level circuit
integration to achieve superior performance while minimizing dimension and power consumption. This
hardware capability combined with software intelligence makes the board easy to be integrated and
used in all kinds of navigation applications or products. The module communicates with application
system via serial LVTTL level signal with NMEA0183 protocol.

EverMore Technology Inc.

2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw

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EB-N701 User’s Manual

1.2 Features

The EB-N701 GPS engine board offers following features:

 Built-in high performance NEMERIX chipset.
 Average Cold Start in 50 seconds.
 Ultra low power consumption.
 16 channels “All-in-View” tracking.
 On chip 4Mb flash memory.
 LVTTL level serial port for GPS receiver command message interface.
 Support standard NMEA-0183 V3.0
 Option accurate 1PPS output signal aligned with GPS timing
 Multi-path mitigation hardware
 Optimum clock drift adjustment
 External antenna open/short detector
 Support dual antenna with built-in auto-detect RF switch
 Compact board Size EBN-700 26.15mm x 26.15mm x 2.7mm (1.03” x 1.03” x 0.11”)

for easy integration into hand-held device.

1.3 Applications

EB-N701 engine board receiver is a high performance, ultra low power consumption, plug &play
product. These applications are as follow.

 Car navigation system for portable device and car device
 Wrist watch
 Solar operated device
 Marine Navigation
 Fleet management
 AVL and location-based services
 Radar detector with GPS function
 Hand-held device for personal positioning and navigation
 Ideal for PDA, pocket PC and other computing devices at GPS application
 Asset tracking
 Timing reference

EverMore Technology Inc.

2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw

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EB-N701 User’s Manual

1.4 Start-up Modes

Definitions

Cold Start

Warm Start

Hot Start

Reacquisition

The Cold Start takes the longest startup time among EMT GPS receivers. In
this scenario, the receiver has no acknowledgment on the last position, time,
and satellite constellation. The receiver is initiated to search blindly for satellite
signals in the cold start mode.

Another situation is that when no backup battery is connected, the GPS
receiver will be in the cold start mode and there is no data stored in SRAM.

Execute cold start of the test tool when first use. By this way can speed up
position fix time.

In this scenario, the receiver was off less than one week but more than 2-hour
time.

The receiver knows its last position, time and almanac because it has a
backup battery to keep current almanac, position and time stored in SRAM.
In the warm start mode, the receiver can quickly acquire satellites and get a
position fix faster than it does in the cold start mode.

In this scenario, the receiver was off less than 2-hour time. With the back up
battery connected and the current almanac, position, time and ephemeris
stored in SRAM, the receiver applies its last ephemeris data to calculate and
get a position fix.

In the reacquisition mode, the receiver takes time to lock on satellites if
buildings or obstacles are blocking the signals for a short while.

This is very common in urban areas, but please be noted that reacquisition
time has nothing to do with the time-to-first-fix (TTFF).

DESCRIPTION

EverMore Technology Inc.

2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw

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EB-N701 User’s Manual

2. Technical Specifications

2.1 Electrical Characteristics

2.1.1 General

Frequency L1, 1575.42 MHz
C/A code 1.023 MHz chip rate
Channels 16

2.1.2 Sensitivity

Tracking -152dBm type
Acquisition -139dBm type

2.1.3 Accuracy

Position 3-25 meters CEP (90%) horizontal, SA off.
Velocity 0.1 meters/second
Time ±100 ns synchronized to GPS time

2.1.4 Datum

Default WGS-84
Other Support different datum by request

2.1.5 Acquisition Rate (Open sky, stationary requirements)

Hot start 7 sec, average
Warm start 38 sec, average
Cold start 50 sec, average

2.1.6 Dynamic Conditions

Altitude 18,000 meters max
Horizontal Velocity 300 kilometers/hour max
Vertical Velocity 36 kilometers/hour max
Acceleration 2g, max
Jerk 4 meters/second

3

, max

EverMore Technology Inc.

2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw

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