REB-1315LP Operational Manual
REB-1315LP Operational Manual
Version 1.6
2007/09/13
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.
1071, Chung Cheng Rd., Suite 9F-1
Tao Yuan City, Taiwan
TEL: 886-3-3569666
FAX: 886-3-3580050
Approved by
Checked by
Prepared by
文件編號：
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REB-1315LP Operational Manual
1. Introduction
RoyalTek REB-1315LP 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
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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 LNA and saw filter
1.1 Product Applications
Automotive navigation
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Personal positioning and navigation
Marine navigation
Timing application
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REB-1315LP Operational Manual
1.2 Product Pictures
(1) REB-1315LP
Pin 1
(2) REB-1315LP Interface board
The interface board pin definition
RoyalTek Evaluation Kit REV-2000 for REB-1315LP
(Please refer to RoyalTek Evaluation Kit REV-2000 for REB-1315LP Operational Manual for more
information)
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REB-1315LP Operational Manual
1.3 REB-1315LP 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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REB-1315LP Operational Manual
1.4 REB-1315LP Technical Specification
Impedance：50Ω
No
Function
Specification
GPS receiver
SiRF Star III, GSC3f/LP
(Digital, RF in a single package)
L1 1575.42MHz.
1
Chipset
2
3
4
5
6
7
8
9
Frequency
Code
C.A. Code.
Channels
20 parallel
Chipset Sensitivity
Chipset cold start
Chipset warm start
Chipset hot start
Reacquisition
-159dBm
35 sec @ open sky (avg.)
35 sec @ open sky (avg.)
1 sec @ open sky (avg.)
0.1sec typical
10 Position accuracy
11 Maximum altitude
12 Maximum velocity
13 Trickle power mode
14 Update rate
10meters at 2D RMS.
18000 m
514 m/s
Duty cycle ≦ 34%. (Variable)
Continuous operation: 1Hz
It shall be able to be tested by SiRF testmode 4 and
single channel simulator.
It shall store the protocol setup in the SRAM memory.
WAAS, EGNOS
15 Testability
16 Protocol setup
17 DGPS
Interface
18 LNA
15dB Gain. (Typical)
22pin
19 I/O Pin
Mechanical requirements
20 Weight
≦3.5g
Power consumption
21 Vcc
DC 3.3 5%
22 Current
GPS :
Typ. [email protected] (Avg Acquisition w/o ext. Antenna)
Typ. [email protected] (tracking w/o ext. Antenna)
Typ. [email protected] (Standby mode w/o ext. Antenna)
Environment
-40 ~ 85℃
23 Operating temperature
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REB-1315LP Operational Manual
≦95%
24 Humidity
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REB-1315LP Operational Manual
1.5 Application Circuit
Reference schematic:
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REB-1315LP Operational Manual
Note:
(1) Ground Planes:
These pin(18、20、21、22) should be connect to ground.
(2) Serial Interface:
(Ⅰ)The TXA pin is the serial output data. Default output GPS protocol. (NMEA
sentence ).
(Ⅱ). The RXA pin is the serial input data. Default output GPS protocol. (NMEA
sentence)
(Ⅲ) The TXB pin is the serial output data (Default Null)
(Ⅳ) 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 VIN_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_VOUT 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.
PS:
(1) This pin can provided maximum current is 30mA @ 2.85V.
(2) The input gain ranges are 19~ 22dB.
(7) GPIO:
The GPIOs functions are for customer used.
If no use GPIO functions, it don’t connect anything.
(8) GPS_RTC1 3.3V/3.3VSUB :
The GPS_RTC1 provide one kinds input voltage.
If you select pin 12 VIN_3V3 voltage then you can ignore 3.3VSUB.
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REB-1315LP Operational Manual
If you choice 3.3VSUB voltage then the power can use by different power supply.
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REB-1315LP Operational Manual
Recommend Layout PAD :
TOP View
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REB-1315LP Operational Manual
Recommend paste mask pad
Recommend paste mask pad is shift outside the layout pad 0.2mm(See under figure)
Black Block is layout PAD、Blue Block(Gray region is paste mask pad recommend)
TOP View
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REB-1315LP Operational Manual
1.6 Mechanical Layout
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REB-1315LP Operational Manual
1.7 Hardware interface
Interface Pin Number:
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REB-1315LP Operational Manual
Pin defined:
Pin Signal Name
I/O Description Characteristics
1
2
3
RXB
TXB
PPS
I
Serial port B 3.15 ≥VIH ≥1.995V
-0.3V ≤VIL ≤ 0.855V
VOL ≤ 0.715V
2.85V ≥ VOH ≥ 2.375V
O
O
Serial port B
One pulse per
second
2.85V ≥ VOH ≥ 2.375V
VOL ≤ 0.715V
2.85V ≥ VOH ≥ 2.375V
VOL ≤ 0.715V
- 0.3V ≤ VIL ≤ 0.855V
-0.3V ≤VIL ≤ 0.855V
VOL ≤ 0.715V
4
5
6
TXA
O
Serial port A
RXA
I
Serial port A 3.15V ≥ VIH ≥1.995V
GPIO[10]
I/O
General
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
purpose I/O
General
7
8
9
GPIO[0]
GPIO[1]
RF_PWR
I/O
I/O
O
-0.3V ≤VIL ≤ 0.855V
VOL ≤ 0.715V
purpose I/O
General
-0.3V ≤VIL ≤ 0.855V
VOL ≤ 0.715V
purpose I/O
Indicates
power state of
RF part
VOL = 0V
10 ON_OFF
I
I
Edge
Reserve function
PS: Let it N.C.
triggered soft
on/off
request.
11 V_RTC_3V3
Backup
DC + 2.5 ~ +3.6V
voltage
Current ≤ 10uA
supply
12 VIN_3V3
13 GPIO[14]
14 GPIO[15]
15 GPIO[13]
I
DC Supply
Voltage input
General
DC +3.3V 5%
I/O
I/O
I/O
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
purpose I/O
General
-0.3V ≤VIL ≤ 0.855V
VOL ≤ 0.715V
purpose I/O
General
-0.3V ≤VIL ≤ 0.855V
VOL ≤ 0.715V
purpose I/O
16
Boot
I
Boot mode
Supply
3.15 ≥VIH ≥1.995V
-0.3V ≤VIL ≤ 0.855V
VO = 2.85V 5%
17 RF_VOUT
O
Antenna Bias Current 30mA
ٛ
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REB-1315LP Operational Manual
voltage
Ground
18 GND
G
I
Reference Ground
19 RF_IN
GPS Signal 50 Ω @1.57542GHz
input
20 GND
21 GND
22 GND
G
G
G
Ground
Ground
Ground
Reference Ground
Reference Ground
Reference Ground
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. This pin via serial port output GPS NEMA
data.
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. (Output 2.85V for user)
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
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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REB-1315LP Operational Manual
V_RTC_3V3 (Backup battery )
This is the battery backup input that powers the SRAM and RTC (Real Time Clock) when
main power is removed. Typical current draw is 10uA.
The supply voltage should be between 2.5V and 3.6V.
ON_OFF (GPS Sleep Mode)
This pin is triggered soft on/off request. Please shall only used to wake up chip. Control for
hibernate. Please let it N.C.
GPIO Functions
Several I/Os are connected to the digital interface connector for custom applications.
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REB-1315LP Operational Manual
2. Software Interface
NMEA V3.0 Protocol
Its output signal level is TTL: 4800 bps (default), 8 bit data, 1 stop bit and no parity. It supports the following
NMEA-0183
Messages: GGA, GSA, GSV, RMC .
NMEA Output Messages: the Engine board outputs the following messages as shown in Table 1:
Table 2 NMEA-0183 Output Messages
NMEA Record
GGA
Description
Global positioning system fixed data
GNSS DOP and active satellites
GNSS satellites in view
GSA
GSV
RMC
Recommended minimum specific GNSS data
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 3 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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REB-1315LP Operational Manual
Table 3 Position Fix Indicators
Description
Fix not available or invalid
Value
0
1
GPS SPS Mode, fix valid
2
Differential GPS, SPS Mode, fix valid
Not Supported GPS PPS Mode, fix valid
Dead Reckoning Mode, fix valid
3-5
6
GSA-GNSS DOP and Active Satellites
Table 2-4 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 4-2
Mode 2
See Table 4-1
Satellite Used
Satellite Used
….
07
02
Sv on Channel 1
Sv on Channel 2
….
Satellite Used
PDOP
Sv on Channel 12
Position Dilution of Precision
Horizontal Dilution of Precision
Vertical Dilution of Precision
1.8
1.0
1.5
*33
HDOP
VDOP
Checksum
＜CR＞＜LF＞
End of message termination
Table 5 Mode 1
Value
Description
1
2
3
Fix not available
2D
3D
Table 6 Mode 2
Value
Description
M
A
Manual-forced to operate in 2D or 3D mode
Automatic-allowed to automatically switch 2D/3D
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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 GGA Data Format
Name
Message ID
Number of
Messages1
Example
$GPGSV
2
Units
Description
GSV protocol header
Range 1 to 3
Messages Number1
Satellites in View
Satellite ID
Elevation
1
07
07
79
048
42
Range 1 to 3
Channel 1(Range 1 to 32)
degrees Channel 1(Maximum 90)
degrees Channel 1(True, Range 0 to 359)
dBHz Range 0 to 99, null when not tracking
….
Azimuth
SNR (C/No)
….
Satellite ID
Elevation
27
27
Channel 4(Range 1 to 32)
degrees Channel 4(Maximum 90)
degrees Channel 4(True, Range 0 to 359)
dBHz Range 0 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 GGA Data Format
Name
Message ID
Example
$GPRMC
161229.487
A
Units
Description
RMC protocol header
UTC Position
Status
hhmmss.sss
A=data valid or V=data not valid
ddmm.mmmm
Latitude
3723.2475
N
N/S Indicator
Longitude
N=north or S=south
dddmm.mmmm
12158.3416
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E/W Indicator
Speed Over Ground
Course Over Ground
Date
W
E=east or W=west
knots
0.13
309.62
120598
degrees
True
ddmmyy
Magnetic Variation
Mode
degrees
E=east or W=west
A
A=Autonomous, D=DGPS, E=DR
Checksum
*10
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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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REB-1315 Operational Manual
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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REB-1315 Operational Manual
6. Contact Royaltek
H eadquarter:
Address: 1071, Chung Cheng Rd., Suite 9F-1 Tao Yuan City, Taiwan
TEL: 886-3-3569666
FAX: 886-3-3580050
7. Revision History
Title
REB-1315LP GPS Receiver Module
Doc Type User Manual
Revision
Date
Author
Change notice
Number
0.1
0.2
0.3
1.0
2006/09/07
2006/11/08
2006/11/13
2006/11/28
Amy Liu
Amy Liu
Amy Liu
Amy Liu
Initial Release
Add recommend layout PAD and modify mechanical layout
Modify 1.6 Mechanical Layout
Modify 1.6 Mechanical Layout, 1.7 Hardware interface
Modify 1.4 REB-1315LP Technical Specification – LNA, 1.5 Reference
schematic; add 5. RGA-1201 Antenna
1.1
1.2
2007/02/06
2007/05/11
Amy Liu
Amy Liu
Modify 1.4 REB-1315LP Technical Specification - Chipset Sensitivity、
cold start、warm start、hot start、DGPS、Operating temperature
Add recommend paste mask pad
1.3
1.4
1.5
1.6
2007/06/21
2007/08/02
2007/09/07
2007/09/13
Amy Liu
Amy Liu
Amy Liu
Amy Liu
Modify 1.5 Active antenna bias voltage: The input gain ranges
Add 5. Matching antenna board
Modify 1.5 reference schematic
Copyright © 2005-2006, RoyalTek Company Ltd.
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