RoyalTek GPS Receiver REB 1315LPNX User Guide

REB-1315LPNX Operational Manual  
REB-1315LPNX Operational Manual  
Version 1.0  
2008/08/07  
This document contains information highly confidential to RoyalTek Company LTD  
(RoyalTek). It is provided for the sole purpose of the business discussions between customer  
and RoyalTek and is covered under the terms of the applicable Non-Disclosure Agreements.  
Disclosure of this information to other parties is prohibited without the written consent of  
RoyalTek.  
Prepared by RoyalTek Company LTD.  
4F., No.188, Wen Hwa 2nd Rd., Kuei Shan,  
Tao Yuan 333, Taiwan  
TEL: 886-3-3960001  
FAX: 886-3-3960065  
Approved by  
Checked by  
Prepared by  
文件編號:  
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1. Introduction  
RoyalTek REB-1315LPNX small form factor board is the newest generation of RoyalTek  
GPS module. The module is powered by latest SiRF Star III single chip and RoyalTek  
proprietary navigation technology that provides you with stable and accurate navigation data.  
The smallest form factor and miniature design is the best choice to be embedded in a device  
such as portable navigation device, personal locator, speed camera detector and vehicle  
locator.  
Product Features  
20 parallel channels  
SMT type with stamp holes  
TCXO design  
0.1 second reacquisition time  
Small form factor with embedded SiRF Star III single chip technology.  
NMEA-0183 compliant protocol/ customize protocol  
Enhanced algorithm for navigation stability  
Excellent sensitivity for urban canyon and foliage environments.  
DGPS (WAAS, EGNOS ) support  
Auto recovery while RTC crashes  
Build-in saw filter  
1.1 Product Applications  
Automotive navigation  
Personal positioning and navigation  
Marine navigation  
Timing application  
3
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1.2 Product Pictures  
(1) REB-1315LPNX  
Pin 1  
(2) REB-1315LPNX Interface board  
The interface board pin definition  
RoyalTek Evaluation Kit REV-2000 for REB-1315LPNX  
(Please refer to RoyalTek Evaluation Kit REV-2000 for REB-1315LPNX Operational Manual for  
more information)  
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1.3 REB-1315LPNX Series Block Diagram  
System block diagram description:  
a. External antenna.  
b. 4 Mega bits flash memory.  
c. 22 pin I/O pin.  
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1.4 REB-1315LPNX Technical Specification  
Impedance50  
No  
Function  
Specification  
GPS receiver  
SiRF Star III, GSC3f/LPx  
(Digital, RF in a single package)  
L1 1575.42MHz.  
1
Chipset  
2
3
4
5
6
7
8
9
Frequency  
Code  
C.A. Code.  
20 parallel  
-159dBm.  
Channels  
Chip Sensitivity  
Chip Cold start (open sky) 35 sec  
Chip Warm start(open sky) 35 sec  
Chip Hot start (open sky) 1 se  
Reacquisition  
0.1sec typical  
10 Position accuracy  
11 Maximum altitude  
12 Maximum velocity  
13 Trickle power mode  
14 Update rate  
15 DGPS  
10meters at 2D RMS.  
18000 m  
514 m/s  
Duty cycle 34%. (Variable)  
Continuous operation: 1Hz  
WAAS, EGNOS  
Interface  
16 LNA  
None  
17 I/O Pin  
22pin stamp holes  
Mechanical requirements  
18 Weight  
3.5g  
Power consumption  
19 Vcc  
DC 3.3 ±5%  
20 Current  
Avg. < [email protected] (Acquisition w/o ext. Antenna)  
Environment  
-40 ~ 85℃  
-40 ~ 85℃  
95%  
21 Operating temperature  
22 Storage temperature  
23 Humidity  
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1.5 Application Circuit  
Reference schematic:  
+3.3V  
R1  
J1  
3
R2  
R3  
HRS_U.FL  
U-FL-R-SMT-3P  
OPEN(10K)  
50 ohm Trace  
1
RXA  
0 ohm  
0 ohm  
C11  
C12  
U1  
2
OPEN  
OPEN  
Please provide  
SYSTEM_TXB  
SYSTEM_RXB  
GPS_PPS  
1
2
20  
19  
18  
17  
16  
22  
15  
14  
13  
12  
11  
DC 5V or 3.3V  
RXB  
GND  
GPS_RF_IN  
GND  
5V or 3.3V  
TXB  
50 ohm Trace  
3
PPS  
4
L4  
39nH/ +/- 0.3nH  
SYSTEM_RX  
SYSTEM_TX  
TXA  
RF_VOUT  
BOOT  
RXA  
5
GPS_BOOT  
RXA  
C10  
21  
6
GND  
GND  
0.1uF  
GPS_IO10  
GPS_IO 0  
GPS_IO 1  
GPIO-13  
GPIO-15  
GPIO-14  
GPS_IO13  
GPIO-10  
GPIO-0  
GPIO-1  
RF_PWR  
ON_OFF  
GPIO-13  
GPIO-15  
GPIO-14  
VIN_3V3  
V_RTC_3V3  
7
GPS_IO15  
+3.3V  
8
GPS_IO14  
9
10  
V_RTC_3V3  
C13  
C14  
(Always)  
0.1uF/X5R/16V  
10uF/Y5V/10V  
+3.3V  
REB-1315  
D301  
2
D302  
3
2
R4  
1
3
1
RB705D  
470  
C15  
U2  
+
RB705D  
10uF /10V /Y5V  
3V 3.3mAH  
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Note:  
(1) Ground Planes:  
These pin(18202122) should be connect to ground.  
(2) Serial Interface:  
()The TXA pin is the serial output data. Default output GPS protocol. (NMEA sentence).  
(). The RXA pin is the serial input data. Default output GPS protocol. (NMEA sentence)  
() The TXB pin is the serial output data (Default Null)  
() The RXB pin is the serial input data (Default Null).  
(3) Backup Battery:  
It’s recommended to connect a backup battery to V_RTC_3V3 pin.  
In order to enable the warm start and hot start features of the GPS receiver.  
If you use backup battery, should be adding a bypassing capacitor (10uF) at  
V_RTC_3V3 pin. It can reduce noise and increase the stability.  
(4) RF_IN:  
Connecting to the antenna has to be routed on the PCB. The transmission line must  
to be control impedance from RF_IN pin to the antenna or antenna connector of  
your choice. (Impedance 50Ω)  
(5) Power:  
Connect V_GPS_3V3 pin to DC 3.3V. The power supply must add bypass capacitor  
(10uF and 1uF).It can reduce the Noise from power supply and increase power  
stability.  
(6) Active antenna bias voltage:  
The RF_OUT pin (pin 17) is provide voltage 2.85V. If you use active antenna, you  
can use this pin to provide bias voltage for active antenna, but you must design the  
RF chock circuit to avoid the RF signal jamming.  
P.S. :  
(1) This pin can provide maximum current is 30mA @ 2.85V.  
(2) The active antenna input gain ranges are recommend 25~ 30dB.  
(7) GPIO:  
The GPIOs functions are for customer used.  
If no use GPIO functions, it doesn’t connect anything.  
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Recommend Layout PAD :  
Dimension13mm*15mm*2.2mm(Tolerance:±0.2mm)  
TOP View  
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Recommend paste mask pad  
Recommend paste mask pad is shift outside the layout pad 0.2mm(See under figure)  
Black Block is layout PADBlue Block(Gray region is paste mask pad recommend)  
TOP View  
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1.6 Mechanical Layout  
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1.7 Hardware interface  
Interface Pin Number:  
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Pin defined:  
Pin Signal Name I/O Description Characteristics  
3.15 VIH 1.995V  
2.85V VOH 2.375V  
2.85V VOH 2.375V  
-0.3V VIL 0.855V  
VOL 0.715V  
RXB  
TXB  
PPS  
I
Serial port B  
1
2
3
O Serial port B  
O One pulse  
per second  
VOL 0.715V  
2.85V VOH 2.375V  
3.15V VIH 1.995V  
3.15 VIH 1.995V  
2.85V VOH 2.375V  
3.15 VIH 1.995V  
2.85V VOH 2.375V  
3.15 VIH 1.995V  
2.85V VOH 2.375V  
VOH = 2.85V  
VOL 0.715V  
- 0.3V VIL 0.855V  
-0.3V VIL 0.855V  
VOL 0.715V  
TXA  
O Serial port A  
4
5
6
RXA  
I
Serial port A  
I/O General  
purpose I/O  
I/O General  
purpose I/O  
I/O General  
purpose I/O  
GPIO[10]  
-0.3V VIL 0.855V  
VOL 0.715V  
GPIO[0]  
GPIO[1]  
RF_PWR  
7
8
9
-0.3V VIL 0.855V  
VOL 0.715V  
VOL = 0V  
O Indicates  
power state  
of RF part  
ON_OFF  
I
Edge  
10  
11  
triggered soft  
on/off  
request.  
Backup  
DC + 2.5 ~ +3.6V  
V_RTC_3V3  
I
I
Current 10uA  
voltage  
supply  
VIN_3V3  
GPIO[14]  
GPIO[15]  
GPIO[13]  
DC Supply  
Voltage input  
DC +3.3V 5%  
12  
13  
14  
15  
3.15 VIH 1.995V  
2.85V VOH 2.375V  
3.15 VIH 1.995V  
2.85V VOH 2.375V  
3.15 VIH 1.995V  
2.85V VOH 2.375V  
-0.3V VIL 0.855V  
VOL 0.715V  
I/O General  
purpose I/O  
I/O General  
purpose I/O  
I/O General  
purpose I/O  
-0.3V VIL 0.855V  
VOL 0.715V  
-0.3V VIL 0.855V  
VOL 0.715V  
3.15 VIH 1.995V  
-0.3V VIL 0.855V  
Boot  
I
Boot mode  
16  
17  
VO = 2.85V 5%  
RF_VOUT  
O Supply  
Antenna  
Current 30mA  
ٛ
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Bias voltage  
G Ground  
GND  
Reference Ground  
18  
19  
RF_IN  
I
GPS Signal 50 @1.57542GHz  
input  
GND  
GND  
GND  
G Ground  
G Ground  
G Ground  
Reference Ground  
Reference Ground  
Reference Ground  
20  
21  
22  
VIN_3V3(+3.3V DC power Input)  
This is the DC power supply input pin for GPS system. It provides voltage to module.  
GND  
GND provides the reference ground.  
Boot  
Set this pin to high for programming flash.  
RXA  
This is the main receiver channel and is used to receive software commands to the board from  
SIRFdemo software or from user written software.  
RXB  
This is the auxiliary receiving channel and is used to input differential corrections to the board  
to enable DGPS navigation. (Default Null).  
TXA  
This is the main transmitting channel and is used to output navigation and measurement data  
to SiRFdemo or user written software.  
TXB  
For user’s application (not currently used). (Default Null).  
RF_PWR  
This pin indicates state of RF voltage.  
RF_IN  
This pin receives GPS analog signal. The line on the PCB between the antenna(or antenna  
connector) has to be a controlled impedance line (Microstrip at 50Ω).  
RF_VOUT  
This pin can provide maximum power [email protected] for active antenna.  
PPS  
This pin provides one pulse-per-second output from the board, which is synchronized to GPS  
time. This is not available in Trickle Power mode.  
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V_RTC_3V3 (Backup battery)  
This is the battery backup input that powers the SRAM and RTC when main power is  
removed. Typical current draw is 10uA.  
The supply voltage should be between 2.5V and 3.6V.  
ON_OFF  
Edge triggered soft on/off request. Should only be used to wake up chip.  
GPIO Functions  
Several I/Os are connected to the digital interface connector for custom applications.  
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2. Software Interface  
NMEA Protocol  
NMEA Output Messages: the Engine board outputs the following messages as shown in Table 1:  
Table 1 NMEA-0183 Output Messages  
NMEA Record  
GGA  
Description  
Global positioning system fixed data  
GNSS DOP and active satellites  
GSA  
GSV  
GNSS satellites in view  
RMC  
Recommended minimum specific GNSS data  
Geographic position – latitude/longitude  
Course over ground and ground speed  
GLL  
VTG  
GGA-Global Positioning System Fixed Data  
Table 2 contains the values of the following example:  
$GPGGA, 161229.487, 3723.2475, N, 12158.3416, W, 1, 07, 1.0, 9.0, M, , , ,0000*18  
Table 2 GGA Data Format  
Name  
Message ID  
Example  
Units  
Description  
GGA protocol header  
hhmmss.sss  
$GPGGA  
UTC Position  
Latitude  
161229.487  
3723.2475  
ddmm.mmmm  
N/S Indicator  
Longitude  
N
N=north or S=south  
Dddmm.mmmm  
12158.3416  
E/W Indicator  
Position Fix Indicator  
Satellites Used  
HDOP  
W
1
E=east or W=west  
See Table 2-1  
07  
1.0  
9.0  
M
Range 0 to 12  
Horizontal Dilution of Precision  
MSL Altitude  
Units  
meters  
meters  
meters  
meters  
second  
Geoid Separation  
Units  
M
Null fields when DGPS is not  
used  
Age of Diff. Corr.  
Diff. Ref. Station ID  
Checksum  
0000  
*18  
CR><LF>  
End of message termination  
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Table 3 Position Fix Indicators  
Description  
Fix not available or invalid  
Value  
0
1
GPS SPS Mode, fix valid  
Differential GPS, SPS Mode, fix valid  
Not Supported  
2
3-5  
6
Dead Reckoning Mode, fix valid  
GSA-GNSS DOP and Active Satellites  
Table 4 contains the values of the following example:  
$GPGSA, A, 3, 07, 02, 26, 27, 09, 04, 15, , , , , , 1.8,1.0,1.5*33  
Table 4 GSA Data Format  
Name  
Message ID  
Mode 1  
Example Units  
Description  
GSA protocol header  
$GPGSA  
A
3
See Table 5  
Mode 2  
See Table 6  
ID of Satellite  
Used  
07  
Sv on Channel 1  
ID of Satellite  
Used  
02  
Sv on Channel 2  
….  
….  
ID of Satellite  
Used  
Sv on Channel 12  
PDOP  
1.8  
1.0  
1.5  
*33  
Position Dilution of Precision  
Horizontal Dilution of Precision  
Vertical Dilution of Precision  
HDOP  
VDOP  
Checksum  
CR><LF>  
End of message termination  
Table 5 Mode 1  
Description  
Value  
M
A
Manual-forced to operate in 2D or 3D mode  
Automatic-allowed to automatically switch 2D/3D  
Table 6 Mode 2  
Value  
Description  
Fix not available  
1
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2
3
2D  
3D  
GSV-GNSS Satellites in View  
Table 7 contains the values of the following example:  
$GPGSV, 2, 1, 07, 07, 79, 048, 42, 02, 51, 062, 43, 26, 36, 256, 42, 27, 27, 138, 42*71  
$GPGSV, 2, 2, 07, 09, 23, 313, 42, 04, 19, 159, 41, 15, 12, 041, 42*41  
Table 7 GSV Data Format  
Name  
Message ID  
Total Number of  
Messages1  
Example  
$GPGSV  
2
Units  
Description  
GSV protocol header  
Range 1 to 3  
Messages Number1  
Satellites in View  
Satellite ID  
1
07  
07  
79  
048  
42  
Range 1 to 3  
Channel 1(Range 1 to 32)  
Elevation  
degrees Channel 1(Range 00 to 90)  
degrees Channel 1(True, Range 000 to 359)  
dBHz Channel 1(Range 0 to 99, null when not  
tracking)  
Azimuth  
SNR (C/No)  
Satellite ID  
Elevation  
27  
27  
Channel 4(Range 01 to 32)  
degrees Channel 4(Range 00 to 90)  
degrees Channel 4(True, Range 000 to 359)  
dB-Hz Channel 4(Range 00 to 99, null when not  
tracking)  
Azimuth  
138  
42  
SNR (C/No)  
Checksum  
*71  
CR><LF>  
End of message termination  
1Depending on the number of satellites tracked multiple messages of GSV data may be required.  
RMC-Recommended Minimum Specific GNSS Data  
Table 8 contains the values of the following example:  
$GPRMC, 161229.487, A, 3723.2475, N, 12158.3416, W, 0.13, 309.62, 120598, ,*10  
Table 8 RMC Data Format  
Name  
Message ID  
UTC Time  
Example  
$GPRMC  
161229.487  
Units  
Description  
RMC protocol header  
hhmmss.sss  
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Status  
A
3723.2475  
N
A=data valid or V=data not valid  
ddmm.mmmm  
Latitude  
N/S Indicator  
Longitude  
N=north or S=south  
dddmm.mmmm  
12158.3416  
W
E/W Indicator  
Speed Over Ground  
Course Over Ground  
Date  
E=east or W=west  
0.13  
knots  
True  
309.62  
120598  
degrees  
ddmmyy  
Magnetic Variation  
Variation sense  
Mode  
degrees  
E=east or W=west (Not shown)  
A=Autonomous, D=DGPS, E=DR  
A
Checksum  
*10  
<CR><LF>  
End of message termination  
VTG-Course Over Ground and Ground Speed  
Table 9 contains the values of the following example:  
$GPVTG,79.65,T,,M,2.69,N,5.0,K,A*38  
Table 9 VTG Data Format  
Name  
Message ID  
Example  
$GPVTG  
79.65  
Units  
degrees  
degrees  
Knots  
Description  
VTG protocol header  
Course over rgound  
Reference  
Measured heading  
True  
T
Course over ground  
Reference  
Measured heading  
Magnetic  
M
2.69  
N
Speed over ground  
Units  
Measured speed  
Knots  
Speed over ground  
Units  
5.0  
K
Km/hr  
Measured speed  
Kilometer per hour  
A-autonomous, D=DGPS, E=DR  
Mode  
A
Checksum  
*38  
<CR><LF>  
End of message termination  
GLL-Geographic Position – Latitude/Longitude  
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Table 10 contains the values of the following example:  
$GPGLL,2503.6319,N,12136.0099,E,053740.000,A,A*52  
Table 10 GLL Data Format  
Example Units  
Name  
Message ID  
Description  
GLL protocol header  
$GPGLL  
Latitude  
2503.6319  
ddmm.mmmm  
N/S indicator  
Longitude  
E/W indicator  
UTC Time  
Status  
N
N=north or S=south  
Dddmm.mmmm  
12136.0099  
E
E=east or W=west  
053740.000  
hhmmss.sss  
A
A
A=data valid or V=data not valid  
A=autonomous, D=DGPS, E=DR  
Mode  
Checksum  
<CR><LF>  
*52  
End of message termination  
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3. GPS Receiver User’s Tip  
A. GPS signal will be affected by weather and environment conditions, so it is recommended to use  
the GPS receiver under less shielding environments to ensure GPS receiver has better receiving  
performance.  
B. When GPS receiver is moving, it will prolong the time to fix the position, so it is recommended  
to wait for the satellite signals locked at a fixed point when first power-on the GPS receiver to  
ensure to lock the GPS signal at the shortest time.  
C. The following situation will affect the GPS receiving performance:  
i. Solar control filmed windows.  
ii. Metal shielded, such as umbrella, or in vehicle.  
iii. Among high buildings.  
iv. Under bridges or tunnels.  
v. Under high voltage cables or near by radio wave sources, such as mobile phone base  
stations.  
vi. Bad or heavy cloudy weather.  
D. If the satellite signals can not be locked or encounter receiving problem (while in the urban area),  
the following steps are suggested:  
i. Please plug the external active antenna into GPS receiver and put the antenna on outdoor  
or the roof of the vehicle for better receiving performance.  
ii. Move to another open space or reposition GPS receiver toward the direction with less  
blockage.  
iii. Move the GPS receiver away from the interferences resources.  
iv. Wait until the weather condition is improved.  
E. While a GPS with a backup battery, the GPS receiver can fix a position immediately at  
next power-on if the build-in backup battery is full-recharged.  
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4. Package Specification and Order Information  
Shipment Method: Tape and reel  
SMT type with stamp holes (22 holes)  
5. Matching active antenna  
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6. Contact Royaltek  
Contact: [email protected]  
Headquarter:  
Address4F., No.188, Wen Hwa 2nd Rd., Kuei Shan, Tao Yuan 333, Taiwan  
TEL: 886-3-3960001  
FAX: 886-3-3960065  
Web Site Customer Service: http://www.royaltek.com/contact  
7. Revision History  
Title  
REB-1315LPNX GPS Receiver Module  
Doc Type User Manual  
Revision  
Date  
Author  
Change notice  
Number  
1.0  
Initial Release  
2007/08/07  
Amy Liu  
Copyright © 2007-2008, RoyalTek Company Ltd.  
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