EverMore EB-N701 User manual

EB-N701 User’s Manual
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
1
EB-N701
GPS Engine Board Receiver
User’s Manual
EverMore Technology Inc.

EB-N701 User’s Manual
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
2
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.

EB-N701 User’s Manual
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
3
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

EB-N701 User’s Manual
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
4
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

EB-N701 User’s Manual
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
5
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.

EB-N701 User’s Manual
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
6
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

EB-N701 User’s Manual
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
7
1.4 Start-up Modes
Definitions DESCRIPTION
Cold Start
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.
Warm Start
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.
Hot Start
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.
Reacquisition
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).

EB-N701 User’s Manual
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
8
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/second3, max

EB-N701 User’s Manual
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
9
2.1.7 Power
Main power input 3.3V ± 0.1Vp-p DC input.
Supply Current Typical 30 mA
2.1.8 Serial Port
Electrical interface one full duplex serial communication, LVTTL interface
Protocol message NMEA-0183, version 3.0
Default NMEA GGA, GSA, GSV, RMC and VTC. 9600 baud rate,
8 bits data, 1 start, 1 stop, no parity.
(Option baud rate: 4800,19200, 38400)
2.1.9 Time-1PPS Pulse(optional)
Level LVTTL
Pulse duration 100ms
Time reference at the pulse positive edge
Measurements Aligned to GPS second, ±1 microsecond
2.1.10 Recommended External Antenna Specification
Gain 20dB (including cable loss)
Noise figure 1.5dB
Current 3~30mA
Operate Voltage 2.5 ~ 2.8V
2.2 Environmental Characteristics
Operating temperature range -40 ℃to +80 ℃
Storage temperature range -50 ℃to +90 ℃
2.3 Physical Characteristics
Dimension: 26.15mm x 26.15mm x 2.7mm (1.03” x 1.03” x 0.11”)
Weight: 3.8g(0.13oz)
Interface connector: 1.27 mm pitch 10 pin / 6 pin board to board

EB-N701 User’s Manual
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
10
2.4 Other Electrical Specifications
Table 1 Absolute Maximum Ratings
Parameter Symbol Min. Max. Units
Power Supply Voltage VDD -0.3 3.6 V
Input Pin Voltage VIN -0.3 3.3 V
Output Pin Voltage VOUT -0.3 3 V
Reset Pin Voltage Vreset -0.3 2.0 V
Storage Temperature TSTG -50 90 °C
Back-up Voltage BAT 2.2 V
Table 2 Operating Conditions
Parameter Symbol Min. Typical Max. Units
Power Supply Voltage VDD 3 3.3 3.6 V
Input Pin Voltage VIN 2.7 3 3.3 V
Operating Temperature TOPR -40 80 °C
Operating Current ICC 30 mA
Table 3 Backup Battery Conditions
Parameter Symbol Min. Typical Max. Units
RTC(Battery) Power BAT 1.2 1.8 2 V
Supply Current 10 µA
Table 4 DC Characteristics
Parameter Symbol Min. Max. Units
Input High Level Vih 2.5 3.5 V
Input Low Level Vil 0 0.8 V
Output High Level Voh 2.4 3.4 V
Output Low Level Vol 0 0.4 V
Input Leakage Current li 2 2 µA

EB-N701 User’s Manual
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
11
3. Hardware Interface
3.1 EB-N701 Real Picture
EB-N701 Engine Board Top View
EB-N701 Engine Board Bottom View

EB-N701 User’s Manual
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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3.2 EB-N701 Mechanical Dimensions Unit: mm
Table 5
Pin Name Pin Name
1 GPIO [4] 11 DSUMUX
2 NC (MODE) 12 DSUEN
3 NMEATX 13 DSUBRE
4 NMEA RX 14 DSUTX
5 NC(WAKE UP) 15 DSURX
6 Reset 16 DSUACT
7 VBAT 17 RF GND
8 GND 18 RF IN
9 VDD 19 RF GND
10 GPIO [0]
*Pin Assignment please refers to the Table 6.
Pin 1
Pin 11
Pin 17
Pin 1
Pin 11
Pin 17

EB-N701 User’s Manual
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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3.3 EB-N701 Serial Interface
Communication to the EB-N701 is provided via a serial interface. A 10-pin 1.27mm whole connector is
used. The pin out is shown in Table 6.
Pin 6 (Reset) is the active-low reset input. The EB-N701 always requires a reset at power-up, or it will
not start properly. An optional onboard reset circuit can be provided. A reset forces the EB-N701
processor to reboot, but will not influence other parameters such as hot or cold start.
Pin 1 (GPIO [4]) and pin 10 (GPIO [0]) are spare pins that can be used e.g. to control power modes, to
indicate EB-N701 status, or to force a cold start. They can be left unconnected if desired.
I/O voltage level is set to 2.7V.
Table 6 Pin list of the serial Interface
Pin Name Type Description
1 GPIO [4] I/O GPS Status
2 NC (MODE) NU Reserved, keep float
3 NMEA TX I/O NMEA Serial Data Output
4 NMEA RX I/O NMEA Serial Data Input
5 NC (WAKEUP) NU Reserved, keep float
6 Reset I Low Active, keep float if not use *1
7 VBAT I Backup Battery Input (1.2~2V)
8 GND PWR Ground
9 VDD PWR +3.0~3.6V DC Power Input
10 GPIO [0] I/O SW dependent functions
*1: Max voltage is DC 2V.
In the case of NMEA(TX & RX), the rate at which data is transmitted is 9600 Baud using printable 8-bit
ASCII characters. Transmission begins with a start bit (logical zero), followed by eight data bits and a
stop bit (logical one) added at the end. No parity bits are used.
LVTTL
Level

EB-N701 User’s Manual
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
14
3.4 EB-N701 Debug Interface
A dedicated pin out (in form of test points) is provided on the board to give the possibility to
connect the EB-N701 debug unit. The debug port is intended to be used only during the development
stage and to download the firmware at factor setup. It is not meant to be used by the customers unless
they want to develop or modify the SW of the EB-N701 module.
The debug port includes the signals required by the debug system unit (DSU). Acompanion DSU
interface board has been already developed.
Table 7 Pin list of the debug Interface
Pin Name Type Description
11 DSUMUX I Serial / DSU select
12 DSUEN I DSU enable
13 DSUBRE I DSU break enable
14 DSUTX O DSU transmitter
15 DSURX I DSU receiver
16 DSUACT O DSU active

EB-N701 User’s Manual
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
15
3.5 EB-N701 Reference Design
3.5.1 Lithium Battery
To EB-N701
Pin7 VBAT

EB-N701 User’s Manual
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
16
3.5.2 Nimh Battery
To EB-N701
Pin7 VBAT

EB-N701 User’s Manual
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
17
4. Operation and Test
The customers can change the data protocol and communication data baud rate for your application
using these tools. The software and manual are available for download from website.
Below list EB-N701 software tools
For example double click 700_SeriesGPSTest.exe to test GM-R700

EB-N701 User’s Manual
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
18
5. Software Specification
5.1 EB-N701 NMEA Protocol
The EB-N701 software is capable of supporting the following NMEA message formats
NMEA Message
Prefix Format Direction
$GPGGA(1)*GPS fix data. Out
$GPGLL Geographic position Latitude / Longitude. Out
$GPGSA(3)*GNSS DOP and actives satellites Out
$GPGSV(3)*Satellites in view. Out
$GPRMC(1)*Recommended minimum specific GNSS data. Out
$GPVTG(1)*Velocity and track over ground. Out
$GPZDA Date and time. Out
*: (1): 1sec output 1msg , (3): 3sec output 1msg , 9600 baud rate (Standard output)
5.2 General NMEA Format
The general NMEA format consists of an ASCII string commencing with a ‘$’ character and
terminating with a <CR><LF> sequence. NMEA standard messages commence with ‘GP’ then a
3-letter message identifier. The message header is followed by a comma delimited list of fields
optionally terminated with a checksum consisting of an asterix ‘*’ and a 2 digit hex value representing
the checksum. There is no comma preceding the checksum field. When present, the checksum is
calculated as a bitwise exclusive of the characters between the ‘$’ and ‘*’. As an ASCII representation,
the number of digits in each number will vary depending on the number and precision, hence the
record length will vary. Certain fields may be omitted if they are not used, in which case the field
position is reserved using commas to ensure correct interpretation of subsequent fields.
The tables below indicate the maximum and minimum widths of the fields to allow for buffer size
allocation.

EB-N701 User’s Manual
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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5.3 $GPGGA
This message transfers global positioning system fix data. The $GPGGA message structure is shown
below:
Field Format Min
chars Max chars Notes
Message
ID $GPGGA 6 6 GGA protocol header.
UTC Time hhmmss.sss 2,2,2.3 2,2,2.3 Fix time to 1ms accuracy.
Latitude float 3,2.4 3,2.4 Degrees * 100 + minutes.
N/S
Indicator char 1 1 N=north or S=south
Longitude float 3,2.4 3,2.4 Degree * 100 + minutes.
E/W
indicator Char 1 1 E=east or W=west
Position Fix
Indictor Int 1 1 0: Fix not available or invalid. 1: GPS SPS mode. Fix available.
Satellites
Used Int 2 2 Number of satellites used to calculate fix.
HDOP Float 1.1 3.1 Horizontal Dilution of Precision.
MSL
Altitude Float 1.1 5.1 Altitude above mean seal level
Units Char 1 1 M Stands for “meters”.
Geoid
Separation Int (0) 1 4 Separation from Geoids can be blank.
Units Char 1 1 M Stands for “meters”.
Age of
Differential
Corrections
int (0) 1 5 Age in seconds Blank (Null) fields when DGPS
is not used.
Diff
Reference
Corrections
int 4 4 0000.
Checksum *xx (0) 3 3 2 digits.
Message
terminator <CR> <LF> 2 2 ASCII 13, ASCII 10.

EB-N701 User’s Manual
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
20
5.4 $GPGLL
This message transfers Geographic position, Latitude, Longitude, and time. The $GPGLL message
structure is shown below:
Field Format Min
chars Max chars Notes
Message ID $GPGLL 6 6 GLL protocol header.
Latitude Float 1,2.1 3,2.4 Degree * 100 + minutes.
N/S Indicator Char 1 1 N=north or S=south.
Longitude Float 1,2.1 3,2.4 Degree * 100 + minutes.
E/W indicator Character 1 1 E=east or W=west.
UTC Time hhmmss.sss 1,2,2.1 2,2,2.3 Fix time to 1ms accuracy.
Status Char 1 1 A Data Valid.
V Data invalid.
Mode Indicator Char 1 1 A Autonomous
Checksum *xx (0) 3 3 2 digits.
Message terminator <CR><LF> 2 2 ASCII 13, ASCII 10.
5.5 $GPGSA
This message transfers DOP and active satellites information. The $GPGSAmessage structure is
shown below:
Field Format Min
chars Max chars Notes
Message ID $GPGSA 6 6 GSA protocol header.
Mode Char 1 1 MManual, forced to operate in
selected mode.
AAutomatic switching between
modes.
Mode Int 1 1 1.Fix not available.
22D position fix.
33D position fix.
Satellites Used Int 2 2 SV on channel 1.
Satellites Used Int 2 2 SV on channel 2.
… . .. .. ..
Satellites Used Int 2 2 SV on channel 12.
PDOP Float 1.1 3.1
HDOP Float 1.1 3.1
VDOP Float 1.1 3.1
Checksum *xx 0 3 2 digits
Message
terminator <CR> <LF> 2 2 ASCII 13, ASCII 10