JP13-LP family

JP13-LP family
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DOCUMENT IS AVAILABLE AT HTTP://WWW.FALCOM.DE/
JP13-LP FAMILY
JP13-LP, JP3-LPx, JP13-B-LP, JP13-S-LP & JP13-S-LPx GPSReceivers
Lead-free products
Hardware description
Version 1.0.4; Last Modified: Tuesday 7 December 2010
JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LPX FALCOM GPS RECEIVERS
VERSION 1.0.4
Table of contents
1 INTRODUCTION.......................................................................................................6
1.1 General...............................................................................................................6
1.2 Order options.....................................................................................................7
1.3 Used abbreviations............................................................................................8
1.4 Related documents............................................................................................8
2 SECURITY..............................................................................................................9
2.1 General information..........................................................................................9
2.2 Restricted use....................................................................................................9
2.3 Children..............................................................................................................9
2.4 Operation/antenna............................................................................................9
2.5 Electrostatic Discharge (ESD).............................................................................9
3 SAFETY STANDARDS.................................................................................................10
4 TECHNICAL DATA....................................................................................................11
4.1 FEATURES.........................................................................................................11
5 TECHNICAL DESCRIPTION...........................................................................................12
5.1 Receiver Architecture......................................................................................12
5.2 Product applications........................................................................................13
5.3 Technical specifications...................................................................................13
5.3.1 Electrical Characteristics........................................................................................................13
5.3.1.1 General...............................................................................................................................................13
5.3.1.2 Accuracy............................................................................................................................................13
5.3.1.3 DGPS Accuracy...................................................................................................................................13
5.3.1.4 Datum................................................................................................................................................13
5.3.1.5 Time to First Position.........................................................................................................................13
5.3.1.6 Sensitivity*.........................................................................................................................................14
5.3.1.7 Dynamic Conditions...........................................................................................................................14
5.3.1.8 DC Power...........................................................................................................................................14
5.3.1.9 Serial Port..........................................................................................................................................14
5.3.1.10 Time – 1PPS Pulse.............................................................................................................................14
5.4 Power management modes overview ............................................................15
5.4.1 Normal Operation mode ........................................................................................................15
5.4.2 Adaptive TricklePower mode (ATP)........................................................................................15
5.4.3 Push-to-Fix Mode ...................................................................................................................16
5.4.4 NMEA input message for ATP & PTF Mode............................................................................17
6 HARDWARE INTERFACE AND CONFIGURATION SIGNALS............................................................19
6.1 Interfaces (pin-out) of the JP13-LP..................................................................19
6.2 Interfaces (ball assignment) of the JP13-B-LP.................................................20
6.3 Interfaces (balls assignment) of the JP13-S-LP................................................22
6.4 Configuration and timing signals.....................................................................23
7 SOFTWARE INTERFACE...............................................................................................25
7.1 SiRF binary data message................................................................................25
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7.2 NMEA data message........................................................................................26
7.2.1 NMEA output messages..........................................................................................................26
7.2.2 NMEA input messages.............................................................................................................26
7.2.3 Transport Message..................................................................................................................27
8 MECHANICAL DRAW.................................................................................................28
9 LAYOUT RECOMMENDATION........................................................................................31
9.1 Ground planes..................................................................................................31
9.2 RF connection..................................................................................................31
10 FIRST STEPS TO MAKE IT WORKS..................................................................................33
11 APPENDIX..........................................................................................................35
11.1 How to set the target GPS receiver into power saving modes?....................35
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VERSION 1.0.4
VERSION HISTORY:
Version
Author
Changes
Modified
1.0.4
F. Beqiri
- Added new JP13-LPx and JP13-S-LPx GPS Receivers - Power consumption added.
07/12/2010
1.0.3
F. Beqiri
- Messages ID 130 and 149 (SiRF binary) are not supported by the SiRF GSW 3.x.x software – see
Table 7
30/11/2007
1.0.2
F. Beqiri
- JP13-LP module can accept only one reflow process.
26/09/2007
1.0.1
F. Beqiri
- Updated soldering profile and added note– see Figure 17, page 34 and read the note below.
20/06/2007
1.0.0
F. Beqiri
- Initial version
03/01/2007
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LPX FALCOM GPS RECEIVERS
VERSION 1.0.4
Cautions
Information furnished herein by FALCOM is believed to be accurate and reliable. However, no responsibility
is assumed for its use. Also the information contained herein is subject to change without notice.
Please, read carefully the safety precautions. If you have any technical questions regarding this document or the
product described in it, please, contact your vendor.
General information about FALCOM and its range of products is available at the following Internet address:
http://www.falcom.de/
Trademarks
Some mentioned products are registered trademarks of their respective companies.
Copyright
This description is copyrighted by FALCOM Wireless Communications GmbH with all rights reserved.
No part of this user’s guide may be produced in any form without the prior written permission of
FALCOM Wireless Communications GmbH.
FALCOM Wireless Communications GmbH.
No patent liability is assumed with respect to the use of the information contained herein.
Note
Specifications and information given in this document are subject to change by FALCOM without notice.
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1
1.1
VERSION 1.0.4
INTRODUCTION
General
This description is focussed on the GPS receiver of the FALCOM JP13-LP family series from FALCOM GmbH.
The JP13-LP family is an excellent device designed for a wide variety of system solutions and offers an easy
integration in various ways on the user application platform. The JP13-LP family architecture based on a
0.13 micron CMOS process of the GSC3eLP chipset is a low-power version of the advanced SiRFstarIII
receiver with increased to 20 parallel channels.
The JP13-LP family with the equivalent of more than 200,000 correlators used for processing signals,
enables extremely fast and deep GPS signal search capabilities; achieving time-to-first-fix in only seconds;
resulting a significant improvement on the GPS performance. The acquiring signals and accomplishment of
getting fixes pushed in places never before expected, supporting a practical of real-time navigation for
location based services, including in many indoor environments, through urban canyons.
The JP13-(S)-LP/LPx delivers major advancements in GPS performance, accuracy, integration, computing
power and flexibility. The FALCOM JP13-LP family has an integrated temperature compensated crystal
oscillators (TCXO). Due to the higher stability of frequency it offers a high-improved GPS performance. In
addition, higher sensitivity allows it more flexibility on its design, the placement of the antenna and the
selection of the kind of antenna. The physical interface to the unit application is made through edge pins,
provided balls or integrated a 50-pin board-to-board connector. This is required for controlling the unit,
receiving GPS location data, transferring data and providing power supply line. The JP13-LP family unit
incorporates 8 megabits of flash memory required for storing the GPS software and user application
programs and 1 megabit of static RAM.
The JP13-LP family consists of two members - the JP13-LP/LPx and JP13-S-LP/LPx. All products have identical
electrical and RF-performance, however, offers different sizes, pin-out and mounting features to the target
application platform. All GPS units introduce new generation of hardware and software.
The single board solution is offered as a 30-pin (24.6 mm x 15.7 mm) edge contacts and as a 48-pin (24.6
mm x 15.7 mm) BGA.
Compared to the JP13-LP/LPx, the JP13-S-LP/LPx are optimized for location applications requiring high
performance in a very small form factor - ideal for devices with limited onboard processing power. The
single board solution is offered as a 52-pin (24.6 mm x 15.7 mm) BGA.
The JP13-LP family concept builds perfect basis for the design of high-sensitive, low-power, compact and
cost efficient state-of-the-art GPS enabled system solutions for target platforms such as mobile phones,
automotive systems, portable computing devices, and embedded consumer devices. The FALCOM JP13-LP
family is also designed to be entire products such as AVL tracking units, handheld GPS.
The core of JP13-LP family units is comprised of the GSC3LP for all JP13(-S)-LP versions and GSC3LPx for all
JP13(-S)-LPx receivers coming with Digital and RF in a single chip, and the GSW3 software stored into the
external FLASH that is API compatible with previous GSW2 software.
The internal GSW3 software completes the package providing flexible system architecture for standalone
GPS based products.
Please, consult SiRF (www.sirf.com) for special information about the GSC3LP (GSC3LPx) SiRFstarIII chipsets.
Users are advised to proceed quickly to the chapter "Security" and read the hints carefully to secure its
optimal use.
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1.2
VERSION 1.0.4
Order options
Before you start up the receiver, make sure that your package includes the following items of the purchased
unit. If any item is missing or damaged, please, contact your vendor immediately. According to your
requirements you can choose the desired unit.
Figure 1:
The FALCOM JP13-LP (left) and JP13-B-LP (right) GPS receivers (top and bottom views)
Figure 2:
The FALCOM JP13-S-LP version 5b PCB (top and bottom views)
THE TABLE BELOW CONTAINS THE ORDER OPTIONS OF JP13-LP FAMILY.
Name
JP13-LP
JP13-LPx
JP13-B-LP
JP13-S-LP
Options
Based on the SiRFstarIII GSC3LP chipset and
packaged in a 30-pin package (edge contacts).
Based on the SiRFstarIII GSC3LPx chipset and
packaged in a 30-pin package (edge contacts)
Based on the SiRFstarIII GSC3LP chipset and
packaged in a 48-pin BGA package (available on
the bottom side of the unit)
Based on the SiRFstarIII GSC3LP chipset and
packaged in a 52-pin BGA package (available on
the bottom side of the unit)
Description
Pin-compatible to the JP7-T embedded GPS receivers.
Pin-compatible to the JP7-T and JP13-LP embedded GPS receivers
It can be handled like a BGA unit during the surface mounting process.
In a very small form factor, it can be handled like a BGA unit during the
surface mounting process.
Evaluation Kit Includes:
JP13-LP-EV
The Evaluation Kit with mounted JP13-LP or JP13S-LP GPS receiver.
JP13-S-LPx
Based on the SiRFstarIII GSC3LPx chipset and
packaged in a 52-pin BGA package (available on
the bottom side of the unit)
Table 1:
- JP13-LP or JP13-S-LP sample with soldered antenna cable
- power supply (AC/DC adapter, Type FW738/05, Output 5VDC 1.3 A)
- active GPS antenna (FAL-ANT-3)
- RS232 level shifter
- RS232 cable to your computer.
In a very small form factor, it can be handled like a BGA unit during the
surface mounting process. Pin-compatible to the JP13-S-LP embedded
GPS receiver
Ordering options
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1.3
Used abbreviations
Abbreviation
Description
BGA
Ball Grid Array
DGPS
Differential GPS
DOP
Dilution of Precision
GPS
Global Positioning System
GGA
GPS Fixed Data
LNA
Low Noise Amplifier
NMEA
National Maritime Electronics Association
PRN
Pseudo - Random Noise Number – The Identity of GPS satellites
RF
Radio Frequency
RP
Receive Protocol
RTC
Real Time Clock
RTCM
Radio Technical Commission for Maritime Services
SDI
Data input
SDO
Data output
SA
Selective Availability
WAAS
Wide Area Augmentation System
MSK
Minimum Shift Keying
PCB
Printed Circuit Board
PRN
Pseudo-random noise
IF
Intermediate Frequency
A/D
Analog/Digital
Table 2:
1.4
VERSION 1.0.4
Abbreviations
Related documents
[1.] SiRF binary and NMEA protocol specification;
www.falcom.de│Support│Download│Documentation│Sirf │ SiRFmessages_SSIII.zip
[2.] SiRF-demo software and manual;
www.falcom.de│Support│Download│Documentation│Sirf │ SiRFdemo.pdf
www.falcom.de│Support│Download│Software & Tools│Sirf │ SiRFdemo.zip
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2
VERSION 1.0.4
SECURITY
This chapter contains important information for the safe and reliable use of the GPS receiver. Please read
this chapter carefully before starting to use the GPS receiver.
2.1
General information
The Global Positioning System uses satellite navigation, an entirely new concept in navigation. GPS has
become established in many areas, for example, in civil aviation or deep-sea shipping. It is making deep
inroads in vehicle manufacturing and before long everyone of us will use it this way or another. The GPS
system is operated by the government of the United States of America, which also has sole responsibility for
the accuracy and maintenance of the system. The system is constantly being improved and may entail
modifications effecting the accuracy and performance of the GPS equipment.
2.2
Restricted use
Certain restrictions on the use of the GPS receiver may have to be observed on board a plane, in hospitals,
public places or government institutions, laboratories etc. Follow these instructions.
2.3
Children
Do not allow children to play with the GPS receiver. It is not a toy and children could hurt themselves or
others. The GPS receiver consists of many small parts which can come loose and could be swallowed by
small children. Thoughtless handling can damage the GPS receiver.
2.4
Operation/antenna
Operate the GPS receiver with an antenna connected to it and with no obstruction between the receiver
and the satellite. Make absolutely sure that the antenna socket or antenna cable is not shorted as this
would render the GPS receiver non-functional. Do not use the receiver with a damaged antenna. Replace a
damaged antenna without delay. Use only a manufacturer-approved antenna. Use only the supplied or an
approved antenna with your GPS receiver. Antennas from other manufacturers which are not authorized by
the supplier can damage the GPS receiver. Technical modifications and additions may contravene local
radio-frequency emission regulations or invalidate the type approval.
Authorized GPS antennas: FAL-ANT-3 (active antenna)
2.5
Electrostatic Discharge (ESD)
The JP13-LP family GPS receiver contains class 1 devices. The following Electrostatic Discharge (ESD)
precautions are recommended:
-
Protective outer garments.
-
Handle device in ESD safeguarded work area.
-
Transport device in ESD shielded containers.
-
Monitor and test all ESD protection equipment.
-
Treat the JP13-LP family GPS receiver as extremely sensitive to ESD.
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3
VERSION 1.0.4
SAFETY STANDARDS
The GPS receiver meets the safety standards for RF receivers and the standards and recommendations for
the protection of public exposure to RF electromagnetic energy established by government bodies and
professional organizations, such as directives of the European Community, Directorate General V in matters
of radio frequency electromagnetic energy.
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4.1
VERSION 1.0.4
TECHNICAL DATA
FEATURES
-
OEM single board 20 channel GPS receiver
-
Size:
JP13-LP/LPx/B : 25.4 x 25.4 x 3 mm (L x B x H)
JP13-S-LP/LPx : 24.6 x 15.7 x 3 mm (L x B x H)
-
Weight:
JP13/-B-LP/LPx : 3 gr
JP13-S-LP/LPx : 2 gr
-
Casing:
Fully shielded
-
TCXO:
± 0.5 ppm
-
FLASH Memory:
8 MBit FLASH.
-
Operating voltage:
+3.3 V DC ±5 %
-
Power consumption:
-
JP13-LP, JP13-S/B-LP
Approx. 140 mW (continuous mode)
JP13-LPx, JP13-S-LPx
Approx. 100 mW (continuous mode)
Power management :
Adaptive TricklePower™ (ATP)
Push-to-Fix (PTF)
For more details see chapter 5.4.
-
Temperature range:
-40 to +85 °C (operation, transportation and
storage).
-
Protocol:
SDI1/ SDO1:
NMEA 38400 baud, Msg.: GLL, GGA, RMC,
GSV, GSA, VTG.
8 data bits, no parity, 1 stop bit
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5.1
VERSION 1.0.4
TECHNICAL DESCRIPTION
Receiver Architecture
The JP13-LP family OEM GPS receiver from FALCOM is a new OEM GPS receiver product that features
the SiRFstarIII single chipset. The core of JP13-LP family units is comprised of the GSC3LP for all JP13(-S)LP versions and GSC3LPx for all JP13(-S)-LPx receivers including the Digital and RF in a single chip. The
JP13-LP family is built around a re-configurable high-output segmented matched filter in conjunction
with a FFT processor, which can search all 1023 chips of the GPS code simultaneously over a wide
frequency range for fast initial acquisition with large uncertainties. The flexibility of the core allows the
core processing engine and memory to be reconfigured to track more than 20 satellites using the same
hardware. This flexibility makes the JP13-LP family a highly efficient engine for a wide variety of location
applications. The core of JP13-LP family contains a built in sequencer, which handles all the high-rate
interrupts for GPS and SBAS (WAAS, EGNOS) tracking and acquisitions. After initialization, the receiver
handles all the time critical and low latency acquisition, tracking and reacquisition tasks of GPS and SBAS
autonomously. The on-chip SRAM size is 1-Mbit (32Kx32) memory that can be used for either
instructions or data. The SRAM is designed for a combination of low power and high speed, and can
support single cycle reads for all bus speeds.
Figure 3:
Receiver architecture of the JP13-LP family GPS receiver.
Figure 3 above shows the block diagram of the JP13-LP family architecture.
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5.2
VERSION 1.0.4
Product applications
- Handheld GPS receiver applications.
- Automotive applications.
- Marine navigation applications.
- Aviation applications.
- Timing applications.
5.3
Technical specifications
5.3.1
Electrical Characteristics
5.3.1.1
5.3.1.2
5.3.1.3
General
Frequency
L1, 1575.42 MHz
C/A code
1.023 MHz chip rate
Channels
20
Max. update rate
1 Hz
Processor speed
6, 12.5, 25 and 49 MHz
Data bus
16 bit
Accuracy
Position
Autonomous: 10 meters CEP without SA
SBAS
< 5 meter
Velocity
0.01 meters/second, without SA
Time
1 microsecond synchronized to GPS time
DGPS Accuracy
The current GPS operating firmware does not support DGPS.
5.3.1.4
Datum
WGS-84
5.3.1.5
Time to First Position
GSM
< 20 sec., average
3G
< 20 sec., average
CDMA
< 16 sec., average
Hot start
< 18 sec., average
Hot start (open sky)
< 1 sec., average
Cold start
< 42 sec., average
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5.3.1.6
VERSION 1.0.4
Sensitivity*
GSM
15 dBHz**
3G
15 dBHz**
CDMA
15 dBHz**
Tracking
13 dBHz
Hot Start
15 dBHz
Cold Start
30 dBHz
*
The sensitivity value is specified at the correlator. On a JP13-LP Evaluation Receiver using GSW3 firmware
with the supplied antenna, 17 dBHz is equivalent to -155 dBm. Other board and antenna characteristics
will vary.
**
Using SiRFLock firmware (not provided by FALCOM).
5.3.1.7
5.3.1.8
Dynamic Conditions
Altitude
18,000 meters (60,000 feet) max.
Velocity
<515 meters/second (1000 knots) max.
Acceleration
4 g, max.
Jerk
20 meters/second³, max.
DC Power
Main power
+ 3.3 V DC ±5 %
Core power
+1.2 V DC
Continuous mode
JP13-LP, JP13-S/B-LP
approx. 43 mA @ 3.3 V DC (with an active antenna
“FAL-ANT-3“)
JP13-LPx, JP13-S-LPx
average 29 mA @ 3.3 V DC (with an active antenna and
“FAL-ANT-3“)
Backup battery power
5.3.1.9
+3 V DC ±5%
Serial Port
Electrical interface
Two full duplex serial communication, CMOS.
Protocol messages: SiRF binary and NMEA-0183 with a
baud rate selection.
SiRF binary – position, velocity, altitude, status and
control NMEA – GGA, GLL, GSA, GSV, RMC, VTG
5.3.1.10 Time – 1PPS Pulse
Level
CMOS
Pulse duration
100 ms (starting from firmware revision 3.2.4, previous
1.5 µs)
Time reference
At the pulse positive edge
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5.4
VERSION 1.0.4
Power management modes overview
There are three basic operating modes in which the JP13-LP family operates during use. Each mode is used
to accomplish a different task during the process of acquiring and maintaining the GPS information. The
JP13-LP family include all the functionality necessary to implement the three different modes of operation.
By default, the JP13-LP family runs in normal mode (continuous mode). All three different operating modes
are described below. Additionally, two of them such as Adaptive TricklePower™ (ATP) and Push-to-Fix (PTF)
are designed as power saving modes.
5.4.1
Normal Operation mode
In this default implementation of normal mode the JP13-LP family is fully powered and performs the
function of signal search, acquisition, measurement and satellite tracking. The amount of time spent in the
initial full power is dependent on the start conditions such as the number of satellites for which the
ephemeris data must be collected and the time to calibrate the RTC. When the JP13-LP family has been
locked-on to at least four satellites, the receiver is able to calculate its current positions. In this mode the
JP13-LP family is fully powered and satellite searching, initial acquisition, initial position calculation and
tracking measurement functions are always performed. In order to reduce the start up time of the receiver
it is preferable to connect externally a backup battery, so that the RTC is running during the power
interrupt. The backup power is required for retention of SRAM memory and maintaining the Real-TimeClock. The validity of data stored in SRAM is kept due to RTC keeps running and these data will be needed
on the next power up scenario.
5.4.2
Adaptive TricklePower mode (ATP)
Adaptive TricklePower (ATP) is a variant of TricklePower ™. But only ATP and Push-To-Fix (PTF is described in
next chapter) modes are supported on JP13-LP family. ATP is best suited for applications where regular
updates are required, and where stronger signal levels are expected. The transition of receiver into the ATP
mode can be done and configured by using either the Action│Set Low Power (Trickle Power) … command
available in SiRFDemo evaluation software or the input command described in chapter 5.4.4 on page 17.
When ATP is enabled the receiver will maximize the navigation performance. Depending on different states
of the power management circuits, the receiver belongs to one of three system states:
Full Power State (Acquisition/Tracking modes)
After initial turn on or system reset, the JP13-LP will remain in the full power state until a series of
Kalman filter navigation solution is obtained, all ephemeris data is collected and the RTC is calibrated
before transitioning to CPU-state. The receiver stays in full power state until a position solution is
made and estimated to be reliable. In this state all RF circuitry and the baseband are fully powered.
Even in this state, there is a difference in power consumption during acquisition mode and tracking
mode. During the acquisition mode, processing is more intense, thus consuming more power
(Diagram is shown below that is simplified for ease of understanding. Timing values are only
examples).
CPU-State
In this state the LNA in the RF section is shut off. The TCXO and fractional synthesizer from the RF
section are still powered in order to provide a clock to the CPU. This state is entered when the
satellite measurements have been collected but the navigation solution still needs to be computed,
thus consuming power is less than in the full power state.
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VERSION 1.0.4
Standby state
In the standby state, power remains applied to the JP13-LP family, but the RF section is completely
powered off and the clock to the baseband is stopped. About 900 µA of current is drawn in this state
for the internal core regulator, RTC and battery-backed RAM. The receiver enters this state when a
position fix has been computed and reported. Typically, before shutting down the RTC wakeup
register is programmed to wake up the system sometime in the future.
Remark:
The environment temperature may also affect the power consumption in the Standby state.
Figure 4:
Three system states into the ATP mode.
The transition from Standby state back to the full power is generated through the internal RTC, which
transmits a wake up signal to the GPS engine to switch it on. The JP13-LP is woken up and begins to acquire
the on view satellites and to collect their data. Under normal tracking conditions, the receiver is set for a
specific update period (range from 1 to 10 seconds), and a specific sampling time during each period (range
from 200 to 900 ms). The receiver turns to full power state for the sampling time to collect data, and then
operates in Standby state for the remainder of the update period. The next full-power state is initiated by
an RTC wakeup. But in harsh tracking environments the receiver automatically switches to full power state
to improve navigation performance. When the satellites are sorted according to their signal strength, the
fourth satellite determines if the transition will occur or not. The threshold is 26 dB-Hz. When tracking,
conditions return to normal (four or more satellites with C/No of 30 dB-Hz or higher), the receiver switches
back to the power saving mode.
5.4.3
Push-to-Fix Mode
The Push-to-Fix mode puts the FALCOM JP13-LP family into a background duty cycle which provides a
periodic refresh of position, receiver time, ephemeris data and RTC calibration every 10 seconds to 2 hours.
The transition of receiver into the Push-to-Fix mode can be implemented and configured by using either the
Action│Set Low Power (Trickle Power) … command available in SiRFDemo evaluation software or the input
command described in chapter 5.4.4 on page 17.
The PTF period is 30 minutes by default but can be anywhere between 10 seconds and 2 hours. When the
PTF mode is enabled, due to a new PTF cycle, the receiver will stay on full power until the good navigation
solution is computed. The so-called hibernate state will follow for the remainder of the period. For example,
if the receiver took 15 seconds to fix position and refresh ephemeris on the default period of 30 minutes,
the receiver will sleep for the 29 minutes and 45 seconds. Whenever the receiver wakes up, it collects
almanac and ephemeris data and then goes back to the previous sleep phase again.
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Page 16
JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
Remark:
VERSION 1.0.4
The environment temperature may also affect the power consumption in the Hibernate state.
Figure 5:
5.4.4
Three system states into the PTF mode.
NMEA input message for ATP & PTF Mode
Power saving mode is disabled by default. In order to enable it, input the NMEA message in table below.
The description of each parameter used for Adaptive TricklePower or Push-to-Fix ™ is listed below. How to
send these messages to the target unit, refer to chapter Appendix section 11.1 page 37.
$PSRF107,<Mode>,<OnTimeMs*>,<LPInterval*>,<MaxAcqTimeMs>,<MaxOffTimeMs>,<TPAdaptive><*C
S><CR><LF>
Syntax
$PSRF107,1,400,2000,60000,60000,1*17<CR><LF>
$PSRF107,2,400,60000,60000,60000,0*21<CR><LF>
Examples
$PSRF107,0,0,0,0,0,0*21<CR><LF>
Parameter Description
<Mode>
It defines the mode to be performed. It can be set to:
0
Sets the target receiver back to the Continuous mode (full
power).
1
Sets the target receiver into the Adaptive TricklePower (TP)
mode.
2
Sets the target receiver into the Push-To-Fix (PTF) mode.
<OnTimeMs*>
It defines the OnTime period in milliseconds the receiver will stay in full power state until
a position solution is made and estimated to be reliable. Please note that, in harsh
tracking environments the receiver automatically switches to full power state to improve
navigation performance even if the defined OnTime has been expired. When the
satellites are sorted according their signal strength, the fourth satellite determines if the
transition to Standby mode/hibernate state will occur or not. It can be set to a value
between:
200 ... 900
OnTime period in milliseconds
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
VERSION 1.0.4
<LPInterval*>
It defines the complete interval of time in milliseconds the receiver will stay in full power
and Standby mode/hibernate state.
It can be set to a value between:
1000 ... 10000
The interval of time in milliseconds intended for Adaptive
TricklePower (ATP) mode.
10000 ... 7200000
The interval of time in milliseconds intended for Push-ToFix (PTF) mode.
<MaxAcqTimeMs>
It specifies the Maximum Acquire Time in milliseconds how long the target receiver
should attempt to acquire satellites and navigate. If this time elapses and no GPS-fix is
obtained, the target receiver is set into the sleep mode for up to MaxOffTime in ms. It
means, the target receiver searches for MaxAcqTime in ms, sleeps for MaxOffTime in ms,
searches again for MaxAcqTime in ms, etc. It can be set to a value between:
1000 ... No Limit
<MaxOffTimeMs>
It specifies the Maximum Off Time in milliseconds how long the target receiver should
remain off (sleep mode) before making another attempt to navigate. This mode is
enabled, if the target receiver is turned on and acquires satellites, but does not navigate.
This mode is disabled, if the target receiver is turned on, acquires and navigates. It can be
set to a value between:
1000 .. 1800000
<TPAdaptive>
It enables/disables the Adaptive TricklePower (ATP) mode if the value of the <Mode>
parameter is set to 1, otherwise it does not have any effect. It can be set to:
0
It disables the Adaptive TricklePower (ATP) mode.
1
It enables the Adaptive TricklePower (ATP) mode.
<*CS>
CHECKSUM is a two-hex character as defined in the NMEA specification. Use of
checksums is required on all input messages. For more detailed information, refer to the
chapter 7.2.3 page 29.
<CR><LF>
Each message is terminated using Carriage Return (CR) Line Feed (LF) which is hex 0D 0A.
Because 0D 0A are not printable ASCII characters, they are omitted from the example
strings, but must be sent to terminate the message and cause the receiver to process that
input message.
* Note:
• SiRF recommends the use of 300 ms, 1-second or 400 ms, 2-second for optimum
performance.
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Page 18
JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
6
VERSION 1.0.4
HARDWARE INTERFACE AND CONFIGURATION SIGNALS
Please note that, the black point on the bottom-left corner marks the antenna side and not
Pin1 (see figure 6).

Figure 6:
6.1
JP13-LP/LPx & JP13-S-LP/LPx orientation point for antenna site.
Interfaces (pin-out) of the JP13-LP/LPx
Figure 7:
JP13-LP/LPx pin out.
Pin
Name
I/O
Description
1
VCC
I
2
GND
-
Digital ground
GND (0 V)
3
BOOT_SELECT
I
Boots in update mode, if high
CMOS
4
SDI1
I
Serial Data Input A (first receive line).
CMOS 3.3 V DC level
5
SDO1
O
Serial Data Output A (first transmit line).
CMOS 3.3 V DC level
6
SDO2
O
Serial Data Output B (second transmit line).
CMOS 3.3 V DC level
7
SDI2
I
Serial Data Input B (second receive line).
CMOS 3.3 V DC level
8
SPI_EN
I
Control output for internal use, only. Do not use, leave it open.
-
9
VCCGSP3
O
Control output for internal use, only. Do not use, leave it open.
-
10
GND
-
Digital ground
GND (0 V)
Main power supply. It also powers the RTC and SRAM.
Level
VI = + 3.3 ±5%
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
VERSION 1.0.4
Pin
Name
I/O
Description
Level
11
RF_GND
-
Analog grounds
GND (0 V)
12
RF_GND
-
Analog grounds
GND (0 V)
13
RF_GND
-
Analog grounds
GND (0 V)
14
RF_GND
-
Analog grounds
GND (0 V)
15
RF_GND
-
Analog grounds
GND (0 V)
16
RF_GND
-
Analog grounds
GND (0 V)
17
RF_IN
I
GPS signal from connected antenna
50 Ohms @ 1.575 GHz
18
RF_GND
Analog ground
GND (0 V)
19
V_ANT
I
Power supply for active antenna
upto +12 V DC
20
VCCRF
O
Supply voltage of RF section
+ 2.85 V DC /
max. 25 mA
21
V_BAT
I
Power for RTC and SRAM. Starting form the JP13-LP_REV04A PCB
version the Vbat signal incorporates voltage detection.
+3 V DC ±5%
22
RESET_N
I
Resets the GPS unit when it is driven LOW.
LOW = 0 V (GND)
23
VCC/GPIO10
I
24
SPI_DATA
O
Control output for internal use, only. Do not use, leave it open.
-
25
NADC_D
I
Control output for internal use, only. Do not use, leave it open.
-
26
SPI_CLK
I
Control output for internal use, only. Do not use, leave it open.
-
27
GPIO0
I/O
General purpose input/output
CMOS
28
Odometer/
GPIO1
I/O
Alternate function is Odometer interface for SiRFDRive (GSW3version). Internal pull-down resistor. Default input at reset. Do not
use, leave it open.
CMOS
29
T-MARK
O
One pulse per second
CMOS
30
GND
-
Digital ground
GND (0 V)
Table 3:
Main power supply. It also powers the RTC and SRAM.
VI = + 3.3 ±5%
Pin assignment of the JP13-LP and JP13-LPx
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
6.2
VERSION 1.0.4
Interfaces (ball assignment) of the JP13-B-LP
Figure 8:
JP13-B-LP ball assignment.
The left figure shows the ball assignments.
Ball
Name
I/O
Description
Level
1
Odometer/
GPIO1
I/O
Alternate function is Odometer interface for SiRFDRive (GSW3version). Internal pull-down resistor. Default input at reset. Do not
use, leave it open.
CMOS
2
GPIO0
I/O
General propose input/output
CMOS
3
SPI_CLK
I
Control output for internal use, only. Do not use, leave it open.
-
4
NADC_D
I
Control output for internal use, only. Do not use, leave it open.
-
5
SPI_DATA
O
Control output for internal use, only. Do not use, leave it open.
-
6
VCC/GPIO10
I
Main power supply. It also powers the RTC and SRAM.
VI = + 3.3 ±5%
7
RESET_N
I
Resets the GPS unit when it is driven LOW.
LOW = 0 V (GND)
8
V_BAT
I
Power for RTC and SRAM. Power for RTC and SRAM. Starting form
the JP13-LP_REV04A PCB version the Vbat signal incorporates
voltage detection.
+3 V DC ±5%
9
VCCRF
O
Supply voltage of RF section
+ 2.85 V DC / max. 25 mA
10
V_ANT
I
Power supply for an active antenna
up to +12 V DC / max. 25 mA
11
RF_GND
-
Analog ground
GND (0 V)
12
RF_GND
-
Analog ground
GND (0 V)
13
RF_IN
I
GPS signal from connected antenna
50 Ohms @ 1.575 GHz
14
GND
-
Digital ground
GND (0 V)
15
GND
-
Digital ground
GND (0 V)
16
GND
-
Digital ground
GND (0 V)
17
GND
-
Digital ground
GND (0 V)
18
GND
-
Digital ground
GND (0 V)
19
GND
-
Digital ground
GND (0 V)
20
GND
-
Digital ground
GND (0 V)
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
VERSION 1.0.4
Ball
Name
I/O
Description
Level
21
GND
-
Digital ground
GND (0 V)
22
GND
-
Digital ground
GND (0 V)
23
GND
-
Digital ground
GND (0 V)
24
GND
-
Digital ground
GND (0 V)
25
GND
-
Digital ground
GND (0 V)
26
GND
-
Digital ground
GND (0 V)
27
GND
-
Digital ground
GND (0 V)
28
VDDK*
O
Control output for internal use, only. Do not use, leave it open.
-
29
ON/OFF*
I
Control output for internal use, only. Do not use, leave it open.
-
30
GND
-
Digital Ground
GND (0 V)
31
VCCGSP3
O
Control output for internal use, only. Do not use, leave it open.
-
32
SPI_EN
I
Control output for internal use, only. Do not use, leave it open.
-
33
SDI2
I
Serial Data Input B (second receive line).
CMOS 3.3 V DC level
34
SDO2
O
Serial Data Output B (second transmit line).
CMOS 3.3 V DC level
35
SDO1
O
Serial Data Output A (first transmit line).
CMOS 3.3 V DC level
36
SDI1
I
Serial Data Input A (first receive line).
CMOS 3.3 V DC level
37
BOOT_SELECT
I
Boots in update mode, if high
CMOS
38
GND
Digital ground
GND (0 V)
39
VCC
I
Main power supply. It also powers the RTC and SRAM.
VI = + 3.3 ±5%
40
VCC
I
Main power supply. It also powers the RTC and SRAM.
VI = + 3.3 ±5%
41
GND
-
Digital Ground
GND (0 V)
42
Wakeup
O
Control output for internal use, only. Do not use, leave it open.
-
43
PWRCTL
O
Control output for internal use, only. Do not use, leave it open.
-
44
Timer_sync
O
Control output for internal use, only. Do not use, leave it open.
-
45
CS2
O
Control output for internal use, only. Do not use, leave it open.
-
46
NADC_CS
O
Control output for internal use, only. Do not use, leave it open.
-
47
T-MARK
O
1 PPS Time Mark Output
CMOS
48
GND
-
Digital ground
GND (0 V)
* The main difference between the JP13-B-LP and the JP17-TB is the function of pins 28 and 29.
Table 4:
Pin assignment of the JP13-B-LP
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Page 22
JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
6.3
VERSION 1.0.4
Interfaces (balls assignment) of the JP13-S-LP/LPx
Figure 9:
JP13-S-LP/LPx ball assignment.
Ball
Name
I/O
Description
Level
1
Odometer/
GPIO1
I/O
Alternate function is Odometer interface for SiRFDRive (GSW3-version).
Internal pull-down resistor. Default input at reset. Do not use, leave it
open.
CMOS
2
GPIO0
I/O
General propose input/output.
CMOS
3
SPI_CLK
I
Control output for internal use, only. Do not use, leave it open.
-
4
NADC_D
I
Control output for internal use, only. Do not use, leave it open.
-
5
SPI_DATA
O
Control output for internal use, only. Do not use, leave it open.
-
6
NC
-
Not connected
-
7
RESET_N
I
Resets the GPS unit when it is driven LOW.
LOW = 0 V (GND)
8
V_BAT
I
Power for RTC and SRAM
+3 V DC ±5%
9
GND
-
Digital ground
GND (0 V)
10
VCCRF
O
Supply voltage of RF section
+ 2.85 V DC /
Imax. 25 mA
11
V_ANT
I
Power supply for an active antenna
Up to +12 V DC /
Imax. 25 mA
12
RF_GND
-
Analog ground
GND (0 V)
13
RF_GND
-
Analog ground
GND (0 V)
14
RF_IN
I
GPS signal from connected antenna
50 Ohms @ 1.575 GHz
15
RF_GND
-
Analog ground
GND (0 V)
16
RF_GND
-
Analog ground
GND (0 V)
17
RF_GND
-
Analog ground
GND (0 V)
18
GND
-
Digital ground
GND (0 V)
19
GND
-
Digital ground
GND (0 V)
20
GND
-
Digital ground
GND (0 V)
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
VERSION 1.0.4
Ball
Name
I/O
Description
Level
21
GND
-
Digital ground
GND (0 V)
22
GND
-
Digital ground
GND (0 V)
23
NC
-
Not connected
-
24
NC
-
Not connected
-
25
NC
-
Not connected
-
26
NC
-
Not connected
-
27
NC
-
Not connected
-
28
VDDK
O
Control output for internal use, only. Do not use, leave it open.
-
29
ON/OFF
I
Control output for internal use, only. Do not use, leave it open.
-
30
GND
-
Digital ground
GND (0 V)
31
VCCGSP3
O
Control output for internal use, only. Do not use, leave it open.
-
32
SPI_EN
I
Control output for internal use, only. Do not use, leave it open.
-
33
SDI2
I
Serial Data Input B (second receive line).
CMOS 3.3 V DC level
34
SDO2
O
Serial Data Output B (second transmit line).
CMOS 3.3 V DC level
35
SDO1
O
Serial Data Output A (first transmit line).
CMOS 3.3 V DC level
36
SDI1
I
Serial Data Input A (first receive line).
CMOS 3.3 V DC level
37
BOOT_SELE
CT
I
Boots in update mode, if high
CMOS
38
VCC
I
Main power supply. It also powers the RTC and SRAM.
VI = + 3.3 ±5%
39
GND
-
Digital ground
40
VCC
I
Main power supply. It also powers the RTC and SRAM.
VI = + 3.3 ±5%
41
GND
-
Digital ground
GND (0 V)
42
Wakeup
O
Control output for internal use, only. Do not use, leave it open.
-
43
PWRCTL
O
Control output for internal use, only. Do not use, leave it open.
-
44
Timer_sync
O
Control output for internal use, only. Do not use, leave it open.
-
45
CS2
O
Control output for internal use, only. Do not use, leave it open.
-
46
NADC_CS
O
Control output for internal use, only. Do not use, leave it open.
-
47
GND
O
Digital ground
GND (0 V)
48
T-MARK
O
1 PPS Time Mark Output
CMOS
49
VCC
I
Main power supply. It also powers the RTC and SRAM.
VI = + 3.3 ±5%
50
NC
-
Not connected
-
51
RF_GND
-
Analog ground
GND (0 V)
52
GND
-
Digital ground
GND (0 V)
Table 5:
Pin assignment of the JP13-S-LP and JP13-S-LPx
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
6.4
VERSION 1.0.4
Configuration and timing signals
RESET_N
This pin provides an active-low (GND) reset input to the board. It causes the board
to reset and to start searching for satellites. If not utilized, this input pin may be left
open.
T-MARK
This pin provides 1 pulse per second output from the board, which is synchronized
to within 1 microsecond of GPS time. The output is a CMOS level signal.
BOOT_SELECT
Set this Pin to high (+3.3 V DC) for reprogramming the flash of the JP13-LP family
(for instance updating a new firmware for the JP13-LP).
SDI1
This is the main receiving channel and is used to receive software commands to the
board from SiRFdemo software or from user written software.
SDI2
This is the auxiliary receiving channel used to input differential corrections to the
board to enable DGPS navigation. Note that, the current operating firmware does
not support DGPS.
SDO1
This is the main transmitting channel and is used to output navigation and
measurement data to SiRFdemo or user written software.
SDO2
For user’s application.
VCC
This is the main DC power supply for 3,3 V ±5 % powered board JP13-LP family.
RF_IN
Active antennas have an integrated low-noise amplifier. They can be directly
connected to this pin (RF_IN). If an active antenna is connected to RF_IN, the
integrated low-noise amplifier of the antenna needs to be supplied with the correct
voltage through pin V_ANT.
Caution: Do not connect or disconnect the antenna while the JP13-LP family is
running.
Caution: The RF_IN is always fed from the input voltage on the V_ANT. Do not use
any input voltage on this pin.
V_ANT
This pin is an input and reserved for an external DC power supply for an active
antenna.
The antenna bias for an external active antenna can be provided in two way s to pin
V_ANT.
In order to use a 5 V or 12 V active GPS antenna, the V_ANT has to be connected to
5 V, 12 V external power supply, respectively.
The other possibility is available when you connect the VCCRF output (which
provides 2.85 V) to V_ANT, so that an antenna with 2.85 V supply voltage can be
used.
Hint: The input voltage on the V_ANT should be chosen in according to the antenna
to be used.
Note: The GPS receiver JP13-LP family has to be connected to an active GPS
antenna with a max. current 25 mA.
VCCRF
This pin is an output, which provides +2.85 V DC, and can be connected to the
V_ANT, to supply the connected GPS antenna (2,85V active antenna).
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Page 25
JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
7
VERSION 1.0.4
SOFTWARE INTERFACE
The FALCOM JP13-LP family supports NMEA-0183 and SiRF binary protocols. A short description of these
protocols is provided herein.
For more detailed information about the messages listed in tables below, please refer to the SiRFstarIII
message
set
specification
available
in
the
section
“Support/Downloads/Documentation/SiRF/SiRFmessages_SSIII.zip” at FALCOM homepage.
7.1
SiRF binary data message
Table 6 lists the messages for the SiRF output
Hex
ASCII
Name
Description
0 x 02
2
Measured Navigation Data
Position, velocity and time
0 x 03
3
True Tracker Data
Not implemented
0 x 04
4
Measured Tracking Data
Satellite and C/No information
0 x 06
6
SW Version
Receiver software
0 x 07
7
Clock Status
Current clock status
0 x 08
8
50 BPS Subframe Data
Standard ICD format
0 x 09
9
Throughput
Navigation complete data
0 x 0A
10
Error ID
Error coding for message failure
0 x 0B
11
Command Acknowledgement
Successful request
0 x 0C
12
Command No Acknowledgement
Unsuccessful request
0 x 0D
13
Visible List
Auto Output
0 x 0E
14
Almanac Data
Response to Poll
0 x 0F
15
Ephemeris Data
Response to Poll
0 x 10
16
Test Mode 1
For use with SiRFtest (Test Mode 1)
0 x 12
18
Ok To Send
CPU ON/OFF (Trickle Power)
0 x 13
19
Navigation Parameters
Response to Poll
0 x 14
20
Test Mode 2
Additional test data (Test Mode 2)
0 x 1C
28
Nav. Lib. Measurement Data
Measurement Data
0 x 1E
30
Nav. Lib. SV State Data
Satellite State Data
0 x 1F
31
Nav. Lib. Initialization Data
Initialization Data
0 x FF
255
Development Data
Various status messages
Table 6:
SiRF Output Messages
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Page 26
JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
VERSION 1.0.4
Table 7 lists the message list for the SiRF input messages.
Hex
ASCII
Name
Description
0 x 55
85
Transmit Serial Message
User definable message
0 x 80
128
Initialize Data Source
Receiver initialization and associated parameters
0 x 81
129
Switch to NMEA Protocol
Enable NMEA message, output rate and baud rate
0 x 82
130
Set Almanac (upload)
Not supported by SiRF GSW 3.x.x software
0 x 84
132
Software Version (Poll)
Polls for the loaded software version
0 x 86
134
Set Main Serial Port
Baud rate, data bits, stop bits and parity
0 x 87
135
Switch Protocol
Obsolete
0 x 88
136
Mode Control
Navigation mode configuration
0 x 89
137
DOP Mask Control
DOP mask selection and parameters
0 x 8B
139
Elevation Mask
Elevation tracking and navigation masks
0 x 8C
140
Power Mask
Power tracking and navigation masks
0 x 8D
141
Editing Residual
Not implemented
0 x 8E
142
Steady-State Detection – not used
Not implemented
0 x 8F
143
Static Navigation
Configuration for static operation
0 x 90
144
Poll Clock Status (Poll)
Polls the clock status
0 x 92
146
Poll Almanac
Polls for almanac data
0 x 93
147
Poll Ephemeris
Polls for ephemeris data
0 x 94
148
Flash Update
On the fly software update
0 x 95
149
Set Ephemeris (upload)
Not supported in the SiRF GSW 3.2.5 software
0 x 96
150
Switch Operating Mode
Test mode selection, SV ID and period
0 x 97
151
Set Trickle Power Parameters
Push to fix mode, duty cycle and on time
0 x 98
152
Poll Navigation Parameters
Polls for the current navigation parameters
0 x A5
165
Set UART Configuration
Protocol selection, baud rate, data bits, stop bits and
parity
0 x A6
166
Set Message Rate
SiRF binary message output rate
0 x A7
167
Low Power Acquisition Parameters
Low power configuration parameters
0 x B6
182
Set UART Configuration
Obsolete
Table 7:
SiRF Input Messages
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Page 27
JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
7.2
NMEA data message
7.2.1
NMEA output messages
VERSION 1.0.4
Table 7 lists all NMEA output messages supported by SiRFstarIII evaluation receiver and a brief
description.
Option
Description
GGA
Time, position and fix type data.
GLL
Latitude, longitude, UTC time of position fix and status.
GSA
GPS receiver operating mode, satellites used in the position solution and DOP values.
GSV
The number of GPS satellites in view satellite ID numbers, elevation, azimuth and SNR values.
MSS
(This message can be switched on via SiRFdemo software) Signal-to-noise ratio, signal strength, frequency and bit
rate from a radio-beacon receiver.
RMC
Time, date, position, course and speed data.
VTG
Course and speed information relative to the ground.
Table 8:
7.2.2
NMEA Output Messages
NMEA input messages
Message
MID1
Description
Set Serial Port
100
Set PORT A parameters and protocol
Navigation Initialization
101
Parameters required for start using X/Y/Z2
Query/Rate Control
103
Query standard NMEA message and/or set output rate
LLA Navigation Initialization
104
Parameters required for start using Lat/Lon/Alt 3
Development Data On/Off
105
Development Data messages On/Off
MSK Receiver Interface
MSK
Command message to a MSK radio-beacon receiver.
Table 9:
MEA Input Messages
1. Message Identification (MID).
2. Input co-ordinates must be WGS84.
3. Input co-ordinates must be WGS84.
Note:
NMEA input messages 100 to 105 are SiRF proprietary. The MSK NMEA string is as defined by
the NMEA 0183 standard.
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
7.2.3
VERSION 1.0.4
Transport Message
Start Sequence
$PSRF<MID>1
Payload
Data2
Checksum
*CKSUM3
End Sequence
<CR> <LF>4
1. Message Identifier consisting of three numeric characters. Input messages begin at MID 100.
2. Message specific data. Refer to a specific message section for <data>...<data> definition.
3. CHECKSUM is a two-hex character checksum as defined in the NMEA specification. Use of checksums is
required on all input messages.
4. Each message is terminated using Carriage Return (CR) Line Feed (LF) which is \r\n which is hex 0D 0A.
Because \r\n are not printable ASCII characters, they are omitted from the example strings, but must be
sent to terminate the message and cause the receiver to process that input message.
CheckSum
The checksum is 15-bit checksum of the bytes in the payload data. The following pseudo code
defines the algorithm used.
Let message to be the array of bytes to be sent by the transport.
Let msgLen be the number of bytes in the message array to be transmitted.
Clearly to say, the string over which the checksum has to be calculated is between the “$” and “*”
(without characters “$” and “*”).
Index = first
checkSum = 0
while index < msgLen
checkSum = checkSum + message[index]
checkSum = checkSum AND (215-1).
Note: All fields in all proprietary NMEA messages are required, none are optional. All NMEA
messages are comma delimited.
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
8
VERSION 1.0.4
MECHANICAL DRAW
The following chapters describe the mechanical dimensions of JP13-LP family and give recommendations for
integrating of the JP13-LP family into your application platform. Note that, the absolute maximum
dimension for JP13-LP/LPx and JP13-B-LP modules is: 25.4 mm x 25.4 mm (L x B).
Figures 10 and 11 show the top view on JP13-LP/LPx and JP13-S-LP GPS receivers and provide an overview
of the mechanical dimensions of the board, respectively.
Please note that, the JP13-LP receiver and all its members have a dimension tolerance: ±0.1 mm.
Figure 10:
The mechanical draw of the JP13-LP/LPx with edge contacts
Figure 11:
The mechanical draw of the JP13-S-LP and JP13-S-LPx GPS receivers
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
VERSION 1.0.4
22.20 mm
20.70 mm
19.70 mm
18.70 mm
17.20 mm
15.70 mm
14.20 mm
12.70 mm
11.20 mm
9.70 mm
8.20 mm
5.70 mm
23.70 mm
0.0 mm
22.70 mm
21.70 mm
21.20 mm
20.20 mm
18.70 mm
17.20 mm
15.70 mm
14.20 mm
12.70 mm
11.20 mm
9.70 mm
8.20 mm
6.70 mm
5.20 mm
4.20 mm
3.70 mm
2.70 mm
m
m
1.70 mm
1.
00
Round ball diameter
2.20 mm
4.70 mm
3.20 mm
6.70 mm
Figure 12 shows the bottom view on JP13-B-LP and provides an overview of the mechanical dimensions of
the pointed balls. The diameter of the test points is 0.80 mm. The test points are not represented in the
figure below. See Figure 8 above as reference.
Square ball dimensions
2.20 mm
Figure 12:
The mechanical draw of the JP13-B-LP receiver
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
VERSION 1.0.4
Figure 13 shows the bottom view on JP13-S-LP/LPx and provides an overview of the mechanical
dimensions of the pointed balls.
Figure 14:
The mechanical draw of the JP13-S-LP/LPx receiver
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
9
9.1
VERSION 1.0.4
LAYOUT RECOMMENDATION
Ground planes
JP13-LP GPS receiver needs two different ground planes. The pins RF_GND shall be connected to analog
ground, the pins GND to digital ground, see tables 3, 4 and Table 5. The two ground planes shall be
separated:
♦ planes are connected inside the receiver (see figure 14).
connected internally
Analog GND
Digital GND
Figure 14:
9.2
Ground plane of the JP13-LP family GPS receivers
RF connection
The JP13-LP family GPS receiver is designed to be functional by using either a passive patch antenna or an
antenna connector with standard RF cables. In order to make a properly RF connection, the user has to
connect the antenna points or the pins of the connector to the RF pin (RF_IN, see tables 3, 4 and Table 5.)
and RF grounds (GND’s of RF part), respectively (see figures below).
Figure 15:
RF connection to antenna feed of the JP13-LP GPS receiver with edge contacts.
Recommendations for layout, and soldering. Please note that, the dimension tolerance is ±0.1 mm.
2.0
0.8
1.9
2.8
25.4
1.277
1.5
25.4
Figure 16:
Recommendations for layout (JP13-LP with edge contacts).
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LPX FALCOM GPS RECEIVERS
VERSION 1.0.4
Figure 17 shows the recommended solder profile for Pb-free JP13-LP family units.
Figure 17:
Typical solder conditions (temperature profile, reflow conditions).
Consider for a long time in the soldering zone (with temperature higher than 217 °C) has to be kept as
short as possible to prevent component and substrate damages. Peak temperature must not exceed 250
°C.
Please note that, this soldering profile is a reference to the soldering machine FALCOM utilizes. This profile
can vary by using different paste types, and soldering machines, and it should be adapted to the customer
application. NO liability is assumed for any damage to the module caused while soldering.
Reflow profiles in tabular form
Profile Feature
Values
Ramp-Up Rate
< 3 K/second
Preheat- zone
Temperature Range
–
–
Time
160-180°C
100-120 seconds
Peak-zone:
–
–
Peak Temperature
Time above 217°C
Ramp-Down Rate
240°C .. 250°C max.
65-75 seconds
< 3 K/second
Note: JP13-LP family modules can accept only one reflow process
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
VERSION 1.0.4
10 FIRST STEPS TO MAKE IT WORKS
Figure 18:
The minimum hardware interface of JP13-LP/LPx (with edge contacts) to get started.
Antenna:
The antenna connection is the most critical part of PCB routing. Before placing the JP13-LP on the
PCB, secure that the connection to the antenna signals is routed. In order to make it properly
functional, a control impedance line has to connect the RF_IN signal with antenna feed points or
antenna connector, respectively. The routing on the PCB depends on your choice.
Power:
The input power is also very important as far as the minimum and maximum voltage is concern ed.
The power supply of JP13-LP family has to be a single voltage source of VCC at 3.3 VDC ±5 %. Please,
connect GND pins to ground, and connect the lines which supply the VCC pin to +3.3 V, properly. If
they are correctly connected, the board is full powered and the unit begins obtaining its position fix.
Serial Interface:
The JP13-LP family provides two serial interfaces. Each interface is provided with two wires the SDI1
and SDO1 lines for the first serial interface (port A) and SDI2 and SDO2 lines for the second serial
interface (port B). The current firmware does not support DGPS correction data. These pins are 3.3 V
CMOS compatible. In order to use different voltage levels, an appropriate level shifter has to be
used.
E.g. in order to provide RS232 compatible levels use the 3 V compatible MAX3232 transceiver
from Maxim or others based on the required levels. The GPS data will be transmitted through
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
VERSION 1.0.4
port A (first serial port), if an active antenna is connected, which has a good view to sky. Pull-up
(100 kΩ) to the unused SDI inputs.
Active Antenna Bias Voltage:
The output voltage at the antenna cable can be used to power the bias voltage of the antenna,
provided can make sure that the antenna runs down to 2.7 V bias voltage and the current does not
exceed 20 mA.
Backup Battery:
In case of a power interruption on pin VCC the real-time clock and backed-up SRAM are continually
supplied through V_BAT. The voltage at this pin has to be +3 V DC ±5%. If you do not use a backup
battery, connect this pin to GND or leave it open.
The quickest way to get first results with the JP13-LP is to use the JP13-LP Evaluation board together with
the program SiRFdemo.
Figure 19:
Evaluation board with connected JP13-LP GPS receiver.
The Evaluation board contains:
- Evaluation Box
- JP13-LP sample with soldered antenna cable
- power supply (AC/DC adapter, Type FW738/05, Output 5VDC 1.3 A)
- active GPS antenna (FAL-ANT-3)
- RS232 level shifter
- RS232 cable to your computer
- Evaluation board user’s manual
The Evaluation board with contained components are not included in the delivery pack age. The
Evaluation board will have to be purchased separately.
The SiRFdemo manual and software are available on FALCOM’s Website for free download:
 www.falcom.de│Support│Download│Documentation│Sirf│SiRFdemo.pdf
 www.falcom.de│Support│Download│Documentation│Sirf│SiRFdemo.zip
This confidential document is the property of FALCOM and may not be copied or circulated without permission.
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JP13-LP /JP13-LPX/JP13-B-LP /JP13-S-LP / JP13-S-LP X FALCOM GPS RECEIVERS
VERSION 1.0.4
11 APPENDIX
11.1 How to set the target GPS receiver into power saving modes?
By means of SiRFdemo software version 3.81 from SiRF the user is able to configure this operation mode
with desired setting.
The input message is accepted if the GPS receiver operates in the NMEA mode, else the input message will
be ignored. The commands above cannot be implemented if the target receiver operates in the SiRF Binary
mode.
In order to set the receiver into the ATP or PTF mode via input messages, start the SiRFdemo software
version 3.81, select the COM port where GPS receiver is connected and the baud rate to 38400 bps, then
open the COM port. If the receiver is operating in SiRF binary mode, switch it to the NMEA mode, select
Switch to NMEA protocol from the Action menu of main window. After the receiver has obtained a GPS fix,
it is able to be set in the ATP or PTF mode. To do this, open Action menu from main window and start
Transmit Serial Message …. On the appeared dialog box select NMEA… protocol from the Protocol
Wrapper option and type the following command onto the memo field as shown in the Figure 20:
PSRF107,1,400,2000,60000,60000,1
(sets the target receiver into the ATP mode. Excluding
$-sign and checksum )
After the message is correctly typed, send the defined message to the target unit by clicking the SEND
button. The target device responds with Acknowledged … if the sent message is accepted by the target unit.
Figure 20:
Transmit a NMEA message to the target unit.
To set the target receiver back to the full power mode just transmit the following message:
PSRF107,0,0,0,0,0,0
// sets the target receiver back to full power mode
For more information, how to send the SiRF Binary or NMEA messages to the target unit, please refer to the
SiRFstarIII
message
set
specification
available
in
the
section
“Support/Downloads/Documentation/SiRF/SiRFmessages_SSIII.zip” at FALCOM homepage.
This confidential document is the property of FALCOM and may not be copied or circulated without permission.
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